Hardware

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  Open Hardware Licensing
  • Anticimex  

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  Im leaving this here for the future. An interesting way/discussion to license and share open source hardware. https://www.eevblog.com/oshw/ EEVblog #921 - Open Source Hardware Problems Solved! – 11:09— EEVblog
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  Step-by-step procedure to connect the NRF24L01+ to the GPIO pins and use the Raspberry as a Serial Gateway (MySensors 1.x)
  gateway raspberry pi raspberry nrf24 raspberry nrf24l01 gpio • • mfalkvidd  

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  @ricorico94 welcome to the MySensors commu ity! All you need to do when switching from raspberry pi gateway to ethernet gateway is change the "hardware" configuration in Domoticz. However, if you are just starting out, don't use this gateway. It works for MySensors 1.x only. Use the new raspberry pi gateway instead.
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  PCB Boards for MySensors
  • meanpenugin  

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  I would like to have some kind of "donate-to-hardware-creator" functionality... anyone here who knows paypal apis and in-and-out? (maybe i'll just contact them directly for the options available).
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  Best time of year to buy higher quality small project solar panels?
  • NeverDie  

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  It probably has to do with fewer people buying them once summer ends, so companies might lower prices to clear out stock before winter.
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  Sleep mode for bmp280
  • fishermans  

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  Just wanted to say thanks for this, it is still relevant and useful six years later !
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  "Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design"
  • wrendral  

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  @wrendral said in "Remote Irrigation with LoRaWAN: LM27313 Challenges and PCB Design": I will go with a Li-Po Battery type: 304048 3.7V 1200mAh Might work, but maybe the internal protection will trigger with the high current peaks. I'd suggest you plan a 0 Ohm, (2512/THT) resistor as R2 and then replace it with a 100Ohm/1Watt if the protection triggers.
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  Does MySensors require Arduino Timer 2?
  mysensors interrupt nano interrupts esp • • OldSurferDude  

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  I have success! (oops, that's suppose to be Timer1) I only sample for 1/60 of a second. What I did was to back up all the timer registered I used and then resorted them after I was done sampling. (As opposed to initializing the registers in setup and then starting the timer when needed.) Now I have a Nano sampling the data and sending it to a MySensors Gateway on an RPi3B+ which then sends it to an MQTT broker runing on an old laptop. Also running on the laptop is Home Assistant running inside of VirtualBox. If MySensors does use Timer1, it appears that restoring the registers allows it to be shared. //------------------------------------------------------ISR ISR(TIMER1_OVF_vect){ // interrupt service routine for overflow TCNT1 = TimerPreloadValue; // must be first line! starts the timer counting again digitalWrite(TRIGGER_START_SAMPLE_PIN,HIGH); samplesVolts[--sample]=analogRead(VOLTS_IN_PIN); // decrement before capturing samplesCurrent[sample]=analogRead(CURRENT_IN_PIN); digitalWrite(TRIGGER_START_SAMPLE_PIN,LOW); if (!sample){ // count down to zero digitalWrite(TRIGGER_START_SAMPLE_PERIOD_PIN,LOW); // indicate that sampling is complete samplingEnd = micros(); TCCR1B &= 248; // turns off timer } } //------------------------------------------------------sampleOneCycle void sampleOneCycle(){ // back up timer registers uint8_t TCNT1_b = TCNT1; uint8_t TCCR1B_b = TCCR1B; uint8_t TCCR1A_b = TCCR1A; uint8_t TIMSK1_b = TIMSK1; // configure timer which starts the sampling noInterrupts(); // disable all interrupts TCCR1A = 0; TCCR1B = 0; TCNT1 = TimerPreloadValue; // preload timer //TCCR1B |= (1 << CS10)|(1 << CS12); // 1024 prescaler TCCR1B &= 248; // turns off timer? TIMSK1 |= (1 << TOIE1); // enable timer overflow interrupt ISR // demark sampling sample = NUMBER_OF_SAMPLES; // count down to zero digitalWrite(TRIGGER_START_SAMPLE_PERIOD_PIN,HIGH); samplingStart = micros(); TCNT1 = 65535; // first trigger right away! TCCR1B |= 1; // turns on timer interrupts(); // enable all interrupts // wait for sampling to be complete while(digitalRead(TRIGGER_START_SAMPLE_PERIOD_PIN)){}; samplingEnd = micros(); // restore timer registers TCNT1 = TCNT1_b; TCCR1B = TCCR1B_b; TCCR1A = TCCR1A_b; TIMSK1 = TIMSK1_b; }
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  Arduino Nano Every problem
  • hakha4  

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  I bought the Every because it implied it was backward compatible with the nano. No, it's not, as we found out. Be that as it may, any word on a getting the Every working with mySensors?
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  Best VOC sensor for detecting a wide range of VOC's?
  • NeverDie  

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  @eiten I haven't yet made any progress on finding a good VOC sensor, but along the way I did find out something interesting regarding CO2: namely, if you sleep with your bedroom door closed at night, then the odds are good that the CO2 levels rise to surprisingly high and unhealthy levels. The better CO2 sensors are factory calibrated and never again need recalibration for the life of the sensor (usually around 10 years or so), because they are used in HVAC systems to control fresh air intake to guarantee indoor air quality. As a for instance, here is one such CO2 sensor: https://www.digikey.com/en/products/detail/senseair/006-0-0008/15790694 At around $50 for just the sensor element itself, it's not exactly cheap, but then again, I'd say it's worth it, because who wants to be burdened by remembering to calibrate their CO2 sensors? Ideally, I'd like to find a sensitive VOC sensor that also will never require calibration. Nearly all, and maybe all, of the off-the-shelf IAQ montoring stuff that you might buy for, say, $300 or less seems to require periodic calibration. For that reason, this might be one of those occasions where build is rather than buy.
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  hlk-pm01 are to noisy for rfm69?
  • Tmaster  

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  @Tmaster Never assume the original PCB was just a circuit of components, the PCB can incorporate RF shields and antenna radio ground planes...
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  Sensors and more
  • Robert Leverett  

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  Which one should i choose? PIR or microwave sensor
  • h01  

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  Supposedly PIR doesn't work through glass (e.g. if looking for motion through a window), whereas I presume a microwave sensor might still work.
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  New user has questions
  • Doggie  

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  I am new in this forum and I have a question regarding mysensors and iobroker. I did not work with mysensors up to now. Since some weeks I use iobroker installed on a raspberrypi. Now I want to integrate my 433 Mhz doorbell in iobroker. I know, that there is an adapter for mysensors in iobroker. My question is: Is it possible to get a notification in iobroker if someone is pressing the button on my doorbell? As I understood, I have to connect the receiver to an arduino nano and connect the arduino to my rasberrypi on which iobroker is running.
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  Node with only sendBatteryLevel into Home Assistant
  • Arno  

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  Great! I'm glad it works and thank you very much for reporting back!
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  Problem with LGT-RF-Nano
  • Sanderunizuki  

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  I had the same problem with "Emakefun LGT-RF-Nano für Arduino Nano V 3,0 RF-NANO LGT8F328P Integrieren NRF24l01 + Micro USB Nano Bord mit Antenne Interface" Using the default Compiler the Serial Messages were not working properly. I used this https://github.com/nulllaborg/arduino_nulllab Board Package and it worked(at least the serial issue). The rest I still need to test. I hope this helps some hours of trouble.
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  nRF5 Multi Sensor Board (12-14€)
  • d00616  

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  https://github.com/sandeepmistry/arduino-nRF5 Install this and find libraries for whatever sensors you have on that board. @basaksts said in nRF5 Multi Sensor Board (12-14€): Also I need an bootloader No, you really don't. You need ST-Link, or J-Link SWD programmer/debugger. Connect it to SWDIO, SWCLK, 3.3V and GND and program it using Arduino IDE.
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  My HW gives me wrong battery voltage
  • igo  

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  It's an awfully convoluted way of doing things but suspect your error lies in misunderstanding calculations mixing ints and floats and something screwy with your resistor bridge - It is always worth checking the bridge with a multimeter and raw voltage to verify the expectation. If you have 3v at the top of your voltage divider, you should be getting 0.9593v applied on the ADC pin which will be read as 892 against the 1.1v internal reference. The easiest way I found was to define a multiplier needed to derive the raw voltage, in this case (((R1+R2)x1.1)/R2) - For your resistor arrangement the max you can read is 3.4404v before exceeding the 1.1v internal reference. To reverse the ADC reading of 892 to raw voltage is (892x3.4404)/1023 = 2.9984 v. Perhaps this is a simpler way to do it float MULTIPLIER= (((1000+470)*1.1)/470);//Resistor bridge values in k and Vref int sensorValue = analogRead(BATTERY_SENSE_PIN); float batteryV = (sensorValue * MULTIPLIER)/1023.0; //Note the trailing decimal point on the 1023 for calculations involving floats
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  sx1262 and LLCC68 support.
  • __isded__  

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  @isded from what is explained in this page it seems it is based on the Semtech SX1278 : https://www.makerfabs.com/sx1278-lora-module-433m-10km-ra-02.html
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  Gateway + Oled ?
  • FcNanoLed  

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  Hello Jeelet, Thank you for the encouragements. Your advice to save (protect) the Oled screen is also welcome, thank you. My code expects it, the text is mini and moves every 3 seconds. Press a key and the menu returns. Cordially.
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  Question: FL5150 LED Dimmer - replace a analog potentiometer with a digital one
  • Omemanti  

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  I just tested 2 led types with no flicker on my attiny circuit. It is funny, the expensive leds like from philips: Dimmable 3.8W Warm White have a flickering behavior . A cheap one available in Action from LSC 6.3W, Dim to Warm and 460 Lumen has no flickering behavior. Another one from Osram Par 1650: 5.5W Dimmable Warm White, 350 Lumen also has no flickering. The philips has the best Energy savings though : 4kWh compared to 7kWh for the LSC one. Is there a relation between energy savings and dim quality ?
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  Seeeduino Xiao nRF52840
  • Fumée Bleue  

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  Local Sensors on Raspberry Pi Gateway
  • OldSurferDude  

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  @mfalkvidd I finally got it to work. Look at my post on the Home Assistant forum. There is an amazing thing that someone in the MySensors world did that makes RPi I/O very easy! Just like the Arduino, one uses the code: pinMode(MphysicalPin, OUTPUT); I couldn't believe my eyes when I saw that. And then got double flabbergasted when I discovered that pin is the physical pin of the RPi! No mapping of GPIOi to the pins. Whew! So the I/O was easier than both of us could have imagined! @mfalkvidd if you know who did this, send them praise and thanks. OSD
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  Long Range again
  • JonAndersen  

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  thanks for sharing!
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  E01-2G4M13S (NRF24L01+ PA + LNA)
  • davethomaspilot  

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  Sensor to measure amount of dripping water?
  • 3nibble  

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  I would think that it's the ambient air temperature that affects how much condensate you collect, together with how much fuel was burned. After the initial warm-up that gets you to steady state, wouldn't the efficiency be constant? If the acidity is a problem, you can run the condensate over a bed of acid neutralizing rocks before it goes down your main drain. It's a thing.
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  Output voltage problem with StepUp Booster 3.3V
  • warmaniac  

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  I would like to step up 3.3V from my power supply with the help of a dc-dc-boost converter to 5V and then I want to draw 500mA by placing a 10 Ohm resistor between the output-pin of the boost-converter and ground.
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  Microwave oven (no kidding :D)
  • ben999  

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  @skywatch great, thanks a lot for your suggestion. A bit of research on the internet educated me about these diodes looks like they already exist on the board that carries the relay. However, i deeply thank you for the info. This forum and internet in general is such a powerful tool @ejlane your concern is fully justified i also come from an engineering background and i like to think "worse case scenario". The more one look the more one find that the very vast majority or microwave ovens work the same way : there are 3 industrial switches built in the door lock. 2 of them are cabled on the "power side", one is for signaling ("software side"). So we are pretty safe on that matter. But you are so right about safety. Magnetron do emitt dangerous waves and capacitors and stuff packed in the oven can be deadly because of high voltage. Thanks both for suggestions. I will come back with updated sketches and beg for advice once more
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  Is Ethernet shield for Nano usable in any way?
  • NeoX  

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  @NeoX I use a Nano, Ethernet, LCD display, and GPS for an NTP server on my isolated network to provide the time for [suspect] cameras. #define VER 12.2 bool debug = false; // must be true to have debug statements go to serial /* NTP Time Server: Modified by Gregg Ferry using softwareserial instead of Serial1 using GY-GPS6MV2 This code is in the public domain. ver 12 time server gets time from Arduino clock instead of from gps */ #define enableEthernet false #define enableGPS true #define enableDisplay true #define minimizeSerialTraffic true #if enableEthernet // ethernet #include <SPI.h> // needed for Arduino versions later than 0018 #include <Ethernet.h> #include <EthernetUdp.h> // UDP library from: bjoern@cs.stanford.edu 12/30/2008 // Time Server MAC address byte mac[] = {0xAA, 0xBB, 0xCC, 0xDD, 0xEE, 0xFF }; // NTP Server public IP Address IPAddress ip(192, 168, 2, 130); // Time Server Port #define NTP_PORT 123 unsigned int localPort = 123; static const int NTP_PACKET_SIZE = 48; // buffers for receiving and sending data byte packetBuffer[NTP_PACKET_SIZE]; // An Ethernet UDP instance EthernetUDP Udp; int packetSize; // NTP since 1900/01/01 //#include <PGMWrap.h> //const uint8_t daysInMonth [] PROGMEM = { 31,28,31,30,31,30,31,31,30,31,30,31 }; //const or compiler complains const uint8_t daysInMonth [] = { 31,28,31,30,31,30,31,31,30,31,30,31 }; //const or compiler complains const unsigned long seventyYears = 2208988800UL; // to convert unix time to epoch #endif #if enableGPS // GPS #include <TinyGPS++.h> //GPS instance TinyGPSPlus tinyGPS; #include <NeoSWSerial.h> //#include <SoftwareSerial.h> #define rxPin 5 #define txPin 4 NeoSWSerial GPSSerial(rxPin, txPin); // CONNECT BT RX PIN TO ARDUINO txPin | CONNECT BT TX PIN TO ARDUINO rxPin char incharBefore=255; char inchar=255; #endif #if enableDisplay // Display #include "SSD1306Ascii.h" #include "SSD1306AsciiAvrI2c.h" #define I2C_ADDRESS 0x3C SSD1306AsciiAvrI2c oled; #endif bool TimeHasBeenSet = false; bool firstPass = true; //Time #include <Timezone.h> //#include "Time.h" TimeChangeRule myDST = {"PDT", Second, Sun, Mar, 2, -420}; // Daylight time = UTC - 7 hours TimeChangeRule mySTD = {"PST", First, Sun, Nov, 2, -480}; // Standard time = UTC - 8 hours Timezone myTZ(myDST, mySTD); TimeChangeRule *tcr; // pointer to the time change rule, use to get TZ abbrev time_t local; String timeString = "hh:mm:ss"; String dateString = "yyyy MMM dd"; const String localDaysOfWeek[] = {"Sunday","Monday","Tuesday","Wednesday","Thursday","Friday","Saturday" }; const String localMonthsOfYear[] = {"JAN","FEB","MAR","APR","MAY","JUN","JUL","AUG","SEP","OCT","NOV","DEC"}; uint8_t localDayOfWeek; uint8_t previousHour = 0; uint8_t previousMinute = 0; uint8_t previousSecond = 0; unsigned long timestamp1970; //-----------------------------------------------------------------------------------printTimes void printTimes(){ Serial.print(F("GPS ")); Serial.print(tinyGPS.date.year());Serial.print(F("/")); Serial.print(tinyGPS.date.month());Serial.print(F("/")); Serial.print(tinyGPS.date.day());Serial.print(F(" ")); Serial.print(tinyGPS.time.hour());Serial.print(F(":")); Serial.print(tinyGPS.time.minute());Serial.print(F(":")); Serial.println(tinyGPS.time.second()); Serial.print(F("UTC ")); Serial.print(year());Serial.print(F("/")); Serial.print(month());Serial.print(F("/")); Serial.print(day());Serial.print(F(" ")); Serial.print(hour());Serial.print(F(":")); Serial.print(minute());Serial.print(F(":")); Serial.println(second()); Serial.print(F("local ")); Serial.print(year(local));Serial.print(F("/")); Serial.print(month(local));Serial.print(F("/")); Serial.print(day(local));Serial.print(F(" ")); Serial.print(hour(local));Serial.print(F(":")); Serial.print(minute(local));Serial.print(F(":")); Serial.println(second(local)); Serial.print(F(" ")); Serial.print(dateString);Serial.print(F(" ")); Serial.println(timeString); } //-----------------------------------------------------------------------------------setTimeAndDateStrings void setTimeAndDateStrings(){ local = myTZ.toLocal(now(), &tcr); // two days ago -172800 char buf[32]; sprintf(buf, "%.2d:%.2d:%.2d",hour(local), minute(local), second(local)); timeString = String(buf); // char m[4]; // temporary storage for month string (DateStrings.cpp uses shared buffer) // strcpy(m, monthShortStr(month(local))); // sprintf(buf, "%.2d %s %d",day(local), m, year(local)); // dateString = String(buf); sprintf(buf, "%.2d ",day(local)); dateString = String(buf); dateString += localMonthsOfYear[month(local)-1]; sprintf(buf," %d",year(local)); dateString += String(buf); localDayOfWeek = weekday(local)-1; } #if enableGPS //-----------------------------------------------------------------------------------getgps static bool getgps() { // and update arduino time if (GPSSerial.available()==0) return false; // while (GPSSerial.available()) { incharBefore = inchar; inchar = GPSSerial.read(); tinyGPS.encode(inchar); if (!TimeHasBeenSet) Serial.print(inchar); // } if ((inchar != 10) || (incharBefore != 13)) return false; // make sure to full NMEA statement was received inchar = 0; incharBefore = 0; // NMEA statement received, reset terminators if(tinyGPS.time.isValid()){ /* * setTime( tinyGPS.time.hour(), tinyGPS.time.minute(), tinyGPS.time.second(), tinyGPS.date.day(), tinyGPS.date.month(), tinyGPS.date.year() ); */ int hh=tinyGPS.time.hour(); int mm=tinyGPS.time.minute(); int ss=tinyGPS.time.second(); int DD=tinyGPS.date.day(); int MM=tinyGPS.date.month(); int YY=tinyGPS.date.year(); setTime(hh,mm,ss,DD,MM,YY); local = myTZ.toLocal(now(), &tcr); //get the local time setTimeAndDateStrings(); if (!TimeHasBeenSet) printTimes(); TimeHasBeenSet = true; return true; } else { return false; } } #endif #if enableDisplay //-----------------------------------------------------------------------------------displayGPStimeSetTheTime void displayGPStimeSetTheTime(bool TimeSetByGPS){ oled.setCursor(0,0); // Start at top-left corner if (TimeSetByGPS) oled.print(F(" ")); else oled.print(F("!")); } //-----------------------------------------------------------------------------------displayAwaitingGPS void displayAwaitingGPS() { oled.clear(); oled.setCursor(0,0); // Start at top-left corner oled.println(F("NTP Server")); oled.println(F(" Awating")); oled.println(F(" GPS Lock ")); Serial.println(F(" Awating GPS Lock ")); } //-----------------------------------------------------------------------------------displayNewDay void displayNewDay(){ previousHour = hour(local); previousMinute= minute(local); previousSecond = second(local); oled.clear(); oled.setCursor(12,0); // center time string oled.print(timeString); uint8_t s = (10-localDaysOfWeek[localDayOfWeek].length())*6; oled.setCursor(s,3); oled.print(localDaysOfWeek[localDayOfWeek]); oled.setCursor(0,6); oled.print(dateString); } //-----------------------------------------------------------------------------------displayTime void displayTime(){ // digital clock display of the time if ((second(local)==0 && minute(local)==0 && hour(local)==0) || firstPass){ // new day firstPass = false; displayNewDay(); } else { if (hour(local) != previousHour){ previousHour = hour(local); oled.setCursor(12,0); oled.print(timeString); } else { if (minute(local) != previousMinute){ previousMinute= minute(local); oled.setCursor(48,0); oled.print(timeString.substring(3)); } else { if (second(local) != previousSecond){ previousSecond = second(local); oled.setCursor(84,0); oled.print(timeString.substring(6)); } } } } } // send to serial monitor #else void displayGPStimeSetTheTime(bool TimeSetByGPS){ } void displayAwaitingGPS() { Serial.println(F(" Awating GPS Lock ")); } void displayTime(){ #if !minimizeSerialTraffic Serial.println(); printTimes(); #endif } #endif //-----------------------------------------------------------------------------------setup #if enableEthernet void setupEthernet(){ // start the Ethernet and UDP: Ethernet.begin(mac,ip); Udp.begin(localPort); Serial.print(Ethernet.localIP()); Serial.print(F(" "));Serial.println(NTP_PORT); } #endif #if enableGPS void setupGPS(){ GPSSerial.begin(9600); // start GPS module UART // Disable everything but $GPRMC // Note the following sentences are for UBLOX NEO6MV2 GPS GPSSerial.write("$PUBX,40,GLL,0,0,0,0,0,0*5C\r\n"); GPSSerial.write("$PUBX,40,VTG,0,0,0,0,0,0*5E\r\n"); GPSSerial.write("$PUBX,40,GSV,0,0,0,0,0,0*59\r\n"); GPSSerial.write("$PUBX,40,GGA,0,0,0,0,0,0*5A\r\n"); GPSSerial.write("$PUBX,40,GSA,0,0,0,0,0,0*4E\r\n"); } #endif #if enableDisplay void setupDisplay(){ oled.begin(&Adafruit128x64, I2C_ADDRESS); oled.setFont(System5x7); oled.set2X(); } #endif void setup() { Serial.begin(115200); Serial.print("NTP Server with display version ");Serial.println(VER); #if enableDisplay setupDisplay(); #endif displayAwaitingGPS(); #if enableEthernet setupEthernet(); #endif #if enableGPS setupGPS(); #endif } //-----------------------------------------------------------------------------------loop void loop() { /* while (Serial.available()){ char inChar = Serial.read(); if (inChar == 'd' || inChar == 'D') { debug = !debug; if (debug) Serial.println(F("debug is ON"));else Serial.println(F("debug is off")); } } */ #if enableGPS if (getgps()){ if(TimeHasBeenSet) displayTime(); } #endif #if enableEthernet // if there's data available, read a packet packetSize = Udp.parsePacket(); if(packetSize) processNTP(); #endif } #if enableEthernet //-----------------------------------------------------------------------------------numberOfSecondsSince1900Epoch unsigned long int numberOfSecondsSince1900Epoch(uint16_t y, uint8_t m, uint8_t d, uint8_t h, uint8_t mm, uint8_t s) { if (y >= 1970) y -= 1970; uint16_t daysLocal = d; for (uint8_t i = 1; i < m; ++i) daysLocal += daysInMonth[i - 1]; // for (uint8_t i = 1; i < m; ++i) // daysLocal += pgm_read_byte(daysInMonth + i - 1); if (m > 2 && y % 4 == 0) ++daysLocal; daysLocal += 365 * y + (y + 3) / 4 - 1; return daysLocal*24L*3600L + h*3600L + mm*60L + s + seventyYears; } //-----------------------------------------------------------------------------------processNTP void processNTP() { Udp.read(packetBuffer,NTP_PACKET_SIZE); IPAddress Remote = Udp.remoteIP(); int PortNum = Udp.remotePort(); /* if (debug) { Serial.println(); Serial.print("Received UDP packet size "); Serial.println(packetSize); Serial.print("From "); for (int i =0; i < 4; i++) { Serial.print(Remote[i], DEC); if (i < 3) { Serial.print("."); } } Serial.print(", port "); Serial.print(PortNum); byte LIVNMODE = packetBuffer[0]; Serial.print(" LI, Vers, Mode :"); Serial.print(packetBuffer[0],HEX); byte STRATUM = packetBuffer[1]; Serial.print(" Stratum :"); Serial.print(packetBuffer[1],HEX); byte POLLING = packetBuffer[2]; Serial.print(" Polling :"); Serial.print(packetBuffer[2],HEX); byte PRECISION = packetBuffer[3]; Serial.print(" Precision :"); Serial.println(packetBuffer[3],HEX); for (int z = 0; z < NTP_PACKET_SIZE; z++) { Serial.print(packetBuffer[z],HEX); if (((z+1) % 4) == 0) { Serial.println(); } } Serial.println(); } // end of debug statements */ packetBuffer[0] = 0b00100100; // LI, Version, Mode packetBuffer[1] = 1 ; // stratum packetBuffer[2] = 6 ; // polling minimum packetBuffer[3] = 0xFA; // precision packetBuffer[7] = 0; // root delay packetBuffer[8] = 0; packetBuffer[9] = 8; packetBuffer[10] = 0; packetBuffer[11] = 0; // root dispersion packetBuffer[12] = 0; packetBuffer[13] = 0xC; packetBuffer[14] = 0; /* uint16_t y=year(); uint8_t m=month(); uint8_t d=day(); uint8_t h=hour(); uint8_t mm=minute(); uint8_t s=second(); if (y >= 1970) y -= 1970; uint16_t daysLocal = d; for (uint8_t i = 1; i < m; ++i) daysLocal += daysInMonth[i - 1]; if (m > 2 && y % 4 == 0) ++daysLocal; daysLocal += 365 * y + (y + 3) / 4 - 1; timestamp1970 = daysLocal*24L*3600L + h*3600L + mm*60L + s + seventyYears; */ // uint16_t utcYY=year(); // uint8_t utcMM=month(); // uint8_t utcDD=day(); // uint8_t utchh=hour(); // uint8_t utcmm=minute(); // uint8_t utcss=second(); // timestamp1970 = numberOfSecondsSince1900Epoch(utcYY,utcMM,utcDD,utchh,utcmm,utcss); // timestamp1970 = numberOfSecondsSince1900Epoch(2022,4,30,10,10,10); timestamp1970 = numberOfSecondsSince1900Epoch(year(),month(),day(),hour(),minute(),second()); /* * timestamp1970 = numberOfSecondsSince1900Epoch( tinyGPS.date.year(), tinyGPS.date.month(), tinyGPS.date.day(), tinyGPS.time.hour(), tinyGPS.time.minute(), tinyGPS.time.second() ); */ unsigned long tempval = timestamp1970; packetBuffer[12] = 71; //"G"; packetBuffer[13] = 80; //"P"; packetBuffer[14] = 83; //"S"; packetBuffer[15] = 0; //"0"; // reference timestamp1970 packetBuffer[16] = (tempval >> 24) & 0XFF; tempval = timestamp1970; packetBuffer[17] = (tempval >> 16) & 0xFF; tempval = timestamp1970; packetBuffer[18] = (tempval >> 8) & 0xFF; tempval = timestamp1970; packetBuffer[19] = (tempval) & 0xFF; packetBuffer[20] = 0; packetBuffer[21] = 0; packetBuffer[22] = 0; packetBuffer[23] = 0; //copy originate timestamp from incoming UDP transmit timestamp packetBuffer[24] = packetBuffer[40]; packetBuffer[25] = packetBuffer[41]; packetBuffer[26] = packetBuffer[42]; packetBuffer[27] = packetBuffer[43]; packetBuffer[28] = packetBuffer[44]; packetBuffer[29] = packetBuffer[45]; packetBuffer[30] = packetBuffer[46]; packetBuffer[31] = packetBuffer[47]; //receive timestamp packetBuffer[32] = (tempval >> 24) & 0XFF; tempval = timestamp1970; packetBuffer[33] = (tempval >> 16) & 0xFF; tempval = timestamp1970; packetBuffer[34] = (tempval >> 8) & 0xFF; tempval = timestamp1970; packetBuffer[35] = (tempval) & 0xFF; packetBuffer[36] = 0; packetBuffer[37] = 0; packetBuffer[38] = 0; packetBuffer[39] = 0; //transmitt timestamp packetBuffer[40] = (tempval >> 24) & 0XFF; tempval = timestamp1970; packetBuffer[41] = (tempval >> 16) & 0xFF; tempval = timestamp1970; packetBuffer[42] = (tempval >> 8) & 0xFF; tempval = timestamp1970; packetBuffer[43] = (tempval) & 0xFF; packetBuffer[44] = 0; packetBuffer[45] = 0; packetBuffer[46] = 0; packetBuffer[47] = 0; // Reply to the IP address and port that sent the NTP request Udp.beginPacket(Remote, PortNum); Udp.write(packetBuffer,NTP_PACKET_SIZE); Udp.endPacket(); } #else void processNTP() {} #endif
• 

  Multi-radio per MCU
  • mavric256  

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  Look here: https://forum.mysensors.org/topic/11135/something-s-cooking-in-the-mysensors-labs?_=1665077470840
• 

  I got a plug-and-play NRF24 shield for the Pi on Aliexpress
  • alowhum  

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  UPDATE: if at one point you need to use GPIO18 for something other then RF24L01 then you have to delete the spi-cs-extend.dtbo file from the /boot/overlays/ and then reboot.
• 

  JSN-SR04T-3.0 Ultrasonic - Please note
  • zboblamont  

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• 

  Temperature and humidity room sensor
  temperature & humidity sensor temperature sensors sql • • martin1234567  

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  @OldSurferDude thank you so much for your reply, I’ll definitely look into this further! Martin
• 

  Need help for yacht lighting wireless switch
  • Damien 0  

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  Thank you very mcuh for your reply, i'll defintely take a look to the sonoff devices if it can suits my need. In the same time regarding eclettis, i contacted them and their reply is that : *Our commands for home automation systems are simple normally open commands so they can be connected to every system. Just pay attention before connecting the device: ensure that the working voltage is properly configured in order to avoid to damage the device. * So i'm still looking in the same time for battery powered 4 way transmitter and corresponding receiver for DC system, on the top of that everything is dimmable led light...
• 

  Unknown Sensor
  • chabo_mq  

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  @chabo_mq Could this possibly be an IR light barrier?
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  I want to know what battery you use. How long can it be used?
  • Rittichai Youyaem  

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  @nagelc Yeah, that was me. I found it makes a difference.
• 

  Need help finding load cell, order qty would be > 32,000 units
  • load_cell_hunter  

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• 

  TEMT6000 Breakout board
  • dbrund  

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  So the station is finally working, with the data being sent to googlesheets and integrated into Data Studio.
• 

  nrf24+ module with stick antenna
  • ben999  

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  @ben999 @NeverDie I had found a similar article about making the antenna a dipole. The interesting thing the article stressed was the lengths of the wires. I'm not an antenna engineer (my brother is) so I made the wires as suggested. I think it made a small improvement. and I still use that radio. My advice on antennas is: don't modify it. If your application needs more range, you're going to need more power. Signal strength drops off with the cube of the distance. So you're going to need a better antenna. For $3 (and a month or two delivery time) you can get a theoretically better module+antenna
• 

  Relay SSR AQH3223 vs AQH3223
  • Rafael Freitas  

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• 

  How is this receiver able to continuously Rx but consume only 90ua?
  • NeverDie  

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  A different link to the same thesis as previoiusly where he claims a wake-up distance of 20 meters: https://hh.diva-portal.org/smash/get/diva2:1187369/FULLTEXT02.pdf Well, it looks not difficult to construct. The AS3933 chips are available for around $1.30 on aliexpress, so cheaper than nRF5x chips. Perhaps cheapest of all would be be a tightly controlled nRF24L01, but it would surely draw more current listening than an AS3933.
• 

  MyS blocking i2c PCF8574
  mysensors • • JeeLet  

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  final sketch and functional with MyController /* * DESCRIPTION : 4 inputs and 4 outputs on i2C bus with a PCF8574 * * LIBRAIRIES: * - Rob Tillaart pour PCF8574 https://github.com/RobTillaart/Arduino/tree/master/libraries/PCF8574 * - MySensors / Arduino Uno https://github.com/mysensors/MySensors * * ELEMENTS: * - Expander PCF8574 avec module Metasys JC / 4di 4do - 0X03D i2c adress * * MODIFICATION: * -x- RAS : Fonctionnelle * -o- * -o- * * (36%) de l'espace de stockage de programmes */ //----------- 9 Mai 2022 ---------------- PCF8574 -4DI-4DO / MyS RS485 et MyC -----------------// //------------------- MyS --------------------------------- //#define MY_DEBUG /*Enable debug prints to serial monitor*/ //#define MY_DEBUG_OTA_DISABLE_ECHO //testing #define MY_TRANSPORT_WAIT_READY_MS 3000 /*Tempo de mis en Com (millisecondes) à placer avant Mysensors.h*/ #define MY_NODE_ID 40 /*Node en ID static*/ /* ----- Module TTL-RS485 ----*/ #define MY_RS485 /*Apl du transport RS485 (protocol?)*/ #define MY_RS485_DE_PIN 10 /*Cmd DE pin*/ #define MY_RS485_BAUD_RATE 9600 /*Set RS485 baud rate to use*/ #define MY_REPEATER_FEATURE /*Activer fonctionnalité de répéteur du nœud*/ #include <MySensors.h> //---------------- PCF ------------------------------- #include "PCF8574.h" PCF8574 PCF27a (0x3D); // adjust addresses i2c pcf8574 // ------ objet ------ #define CHILD_ID_B0 0 /*Id IN - bp */ #define CHILD_ID_B1 1 #define CHILD_ID_B2 2 #define CHILD_ID_B3 3 #define CHILD_ID_R4 4 /*Id OUT - relay */ #define CHILD_ID_R5 5 #define CHILD_ID_R6 6 #define CHILD_ID_R7 7 #define RELAY_ON 0 // 1 valeur #define RELAY_OFF 1 // 0 invers //---------- MyS ------------- MyMessage msg0(CHILD_ID_B0,V_TRIPPED); /*Boton*/ MyMessage msg1(CHILD_ID_B1,V_TRIPPED); MyMessage msg2(CHILD_ID_B2,V_TRIPPED); MyMessage msg3(CHILD_ID_B3,V_TRIPPED); MyMessage msg4(CHILD_ID_R4,V_STATUS); /*Relay*/ MyMessage msg5(CHILD_ID_R5,V_STATUS); MyMessage msg6(CHILD_ID_R6,V_STATUS); MyMessage msg7(CHILD_ID_R7,V_STATUS); bool info; // pour info GW sur MyC bool state = false; // output // bool state4 = false; bool state5 = false; bool state6 = false; bool state7 = false; int oldValue0=-1; int oldValue1=-1; int oldValue2=-1; int oldValue3=-1; // Input //---------------- SETUP ------------------------- void setup() { // Serial.begin(115200); // debug //--------- testing IsConnected i2c PCfx ------------ Serial.println(__FILE__); Serial.print("PCF8574_LIB_VERSION:\t"); Serial.println(PCF8574_LIB_VERSION); if (!PCF27a.begin()) { Serial.println("could not initialize..."); } if (!PCF27a.isConnected()) { Serial.println("=> not connected"); } else { Serial.println("=> connected!!"); } // ---- info send to gateway ---- send(msg0.set(info)); send(msg1.set(info)); //input wait(200); send(msg2.set(info)); send(msg3.set(info)); //input wait(200); //delays for frames, depending on system load and bus type (wireless or wired) send(msg4.set(info)); send(msg5.set(info)); //output wait(200); send(msg6.set(info)); send(msg7.set(info)); //output } //----------------- MyS ---------------------------- void presentation() { sendSketchInfo("PCF8574 x4in/out - node40", "2.0"); /*info version sketch*/ /*Mysenors Enregistre Child sur la Gw*/ present(CHILD_ID_B0, S_DOOR, "boton0"); /*Boton*/ present(CHILD_ID_B1, S_DOOR, "boton1"); wait(200); present(CHILD_ID_B2, S_DOOR, "boton2"); present(CHILD_ID_B3, S_DOOR, "boton3"); wait(200); //delays for frames, depending on system load and bus type (wireless or wired) present(CHILD_ID_R4, S_BINARY, "relay4"); /*Relay*/ present(CHILD_ID_R5, S_BINARY, "relay5"); wait(200); present(CHILD_ID_R6, S_BINARY, "relay6"); present(CHILD_ID_R7, S_BINARY, "relay7"); wait(200); // metric = getControllerConfig().isMetric; } //----------------- LOOP ---------------------------- void loop() { //----------- MyS input ------------------------------- int value0 = PCF27a.read(0); if (value0 != oldValue0) { send(msg0.set(value0==HIGH ? 1 : 0)); //Send new value oldValue0 = value0; } int value1 = PCF27a.read(1); if (value1 != oldValue1) { send(msg1.set(value1==HIGH ? 1 : 0)); oldValue1 = value1; } int value2 = PCF27a.read(2); if (value2 != oldValue2) { send(msg2.set(value2==HIGH ? 1 : 0)); oldValue2 = value2; } int value3 = PCF27a.read(3); if (value3 != oldValue3) { send(msg3.set(value3==HIGH ? 1 : 0)); oldValue3 = value3; } } //----------- MyS out ------------------------------- void receive(const MyMessage &message) { if (message.getType()==V_STATUS) { switch (message.sensor) { case 4: state= message.getBool(); PCF27a.write(4, state?RELAY_ON:RELAY_OFF); break; case 5: state = message.getBool(); PCF27a.write(5, state?RELAY_ON:RELAY_OFF); break; case 6: state = message.getBool(); PCF27a.write(6, state?RELAY_ON:RELAY_OFF); break; case 7: state = message.getBool(); PCF27a.write(7, state?RELAY_ON:RELAY_OFF); break; } } } //------------------------------ End pgm -------------------------------------
• 

  Best PCB Assembly / Manufacturing for UK and Europe?
  • bitterpea  

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• 

  Reed Switch normally open or normally closed
  hardware 3d print • • therik  

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  i had good experience with it. . .
• 

  about Arduino + NRF24L01 need help please.
  • llasking  

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  @llasking Have a look on the arduino forum or github - I still use the older tmrh library for point-to-point on things made before I changed over to mysensors. There is also a nrf24-lite library as well, but I have never used it.
• 

  Mysensors exemple sketch on SAMD21 with i2c EEPROM
  • Laurent Guilloton  

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• 

  Reading INPUTS from arduino in domoticz
  • Mati_Smart  

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  @Mati_Smart, if the messages from the sensor are arriving in domoticz, it must be some configuration in domoticz itself. Can't help you here, I don't know domoticz. Did you search already on the domoticz forum?
• 

  CO2 Sensor Senseair S8 - big values read
  • wasssu  

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  maybe check what they did here: https://github.com/airgradienthq/arduino/blob/master/AirGradient.cpp
• 

  Sensor reboot with Ebyte NRF
  • tutur19  

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  Thanks to all. It's very strange. I try to test NFR with Uno and PCB regulator (3V3 + capacitor) , It's work with old NRF but when I switch old NRF to Ebyte, it's not working... But I test Ebyte antenna to my gateway and it's working, so it's not broken
• 

  Connecting the Dallas DS18B20 temperature sensor.
  • Feliw05  

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  @Feliw05 You have left and right transposed. Looks like the left should go to Vcc and the right should go to ground....or are you looking at it from a different angle?
• 

  Increasing range of 8MHz ATMEGA328P with NRF24L01
  • Ethan Chua  

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  @Ethan-Chua In Arduino IDE, go to "Tools" -> "minicore" and select the board you are using from the drop down menu. Then underneath 'Tools' menu you will see all options for the bootloader. You should select these values to match your requirements.
• 

  Best way to power nano and relay?
  • fhenryco  

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  i tested that if the relay is powered directly and not through the aduino and for all my usb chargers, the switch is 100% responding. dont know really why but it seems better.
• 

  Raspberry Pi 3 as Gateway using RS485
  • matz  

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  Hi All, Following along this thread for RS485, I'm having a difficult time getting any communication to be received from another RS485 Node. I've tried both the Master and Development Branchs on RPI A. In Compiling the configuration in either case, I see alot of Compiler Warning during the make process. Has there been any more movement regarding this repo since the last dated response in this thread. AS of June 6th 2017 - Like 5 Years AGO???
• 

  Heltec Lora32 V2 Gateway
  • pdkwork  

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  Success! In all my testing and trying new settings, I missed that I had commented out on the gateway the frequency setting. It was noobie mistake and I want to thank all of you for your help. I ended up using @FarmerEd's sketches to get my gateway and sensor to work. Thanks again.
• 

  Ultrasonic sensor JSN-SR04T
  mysensors • • Kavitha  

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  To provide a large enough pulse to drive the ceramic transducer , you need a lot of energy, so they pump up the 5v with an inductor/transformer to provide a high voltage pulse. This is 60v or more… The more Energy you produce the farther the pulse will travel…. Everything thing else on the board run at 3.3 to 5V. Add a large Capacitor of 100 µF are so between the 5v and ground on the device, this may clean up your problem.. Some CPU modules just can’t supply enough current quick enough that’s needed when the pulse is triggered. These are very inexpensive device, we’re luck to see them work at 1/2 the spec range.
• 

  Self-balancing robot using MPU-6050
  • Henil179  

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  HI @Henil179 I made one myself a couple of years ago, and yes, it was a fair bit of trial and error to get it working. Of course, the gain values will be dependent on a number of factors, for example, the torque constant of your motor, the gear ratio, the mass of the robot, where your centre of gravity is located, your loop rate, and where you've located your mpu-6050. I located my mpu-6050 over the axis at 12 o'clock near the vertical centre of my bot. What are you control variables? I used pitch (angle of rotation around motor axis) calculated from gx, gz and tan function. I also used pitch rate from the gyro. Are you using the onboard DSP of the mpu-6050 to do the calculations? I had no luck with this, the mpu-6050 kept freezing up, bad clone I guess. You also have to verify the direction of rotation of your motor versus your control variables. If you have the wrong direction, it will just run away. My gains are Kp:41, Ki:160, Kd:0.4 I started with only Kp and kept increasing the value until the system became unstable, then I backed off to a stable point. Next, I began increasing Ki. This will bring you to steady state stability. It should balance itself when Kp & Ki. You will likely have to reduce Kp somewhat as you move to higher Ki values, if your system becomes unstable. Finally, I added Kd, to help it react more quickly to changes in angle. How do you change your gains? I have a bluetooth module on mine, to allow me to send serial commands to the robot, to set the gains and other things. My robot's biggest problem is gear backlash. This generates acceleration noise as it vibrates backward/forward, balancing itself. This vibration can feedback on itself and cause instability (when you increase Kp too high). It looks like the robot has Parkinsons when this happens! I'd like to update my design to use a belt/gear drive or continuous rotation servo, but I haven't had a chance to get back to it. I hope this helps.
• 

  Pir AS 312 with 2 rechargeable AAA battery. Boost needed?
  • franz-unix  

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  One Last (boring ) question... Have you placed a flyback diode across the inductor? I'm not sure if this component is strictly necessary.
• 

  Building a gateway on Linux with a USB stick
  • molpie  

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• 

  MySensors @ Raspberry Pi without gateway
  • pikim  

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  I'm not really familiar with FHEM, but as far as the MySensors side, you still need the gateway software running. However, this code can run directly on a Raspberry Pi, at least with a radio network for the MySensors transport. I haven't ever used RS485 myself, but I would think it would be similar. At least the code itself has sections for dealing with running on Linux, which is what is used when running it on the RPi, so I think you're good. https://github.com/mysensors/MySensors/blob/master/hal/transport/RS485/MyTransportRS485.cpp The gateway code runs as a systemctl service, so it can easily run in parallel with most things, so probably wouldn't conflict with FHEM on the same device. Oh yeah, and in case you haven't found it, there's this page: https://www.mysensors.org/build/rs485
• 

  Modifying IKEA Tradfri Sensor (E1525) timeout help wanted
  • bob21  

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  Hello everyone! Based on the quite useful reverse engineered schematic at https://hackaday.io/project/174308-tradfri-pir-motion-sensor-hacking the measurements were somewhat sabotaged by the 2N7002 (see Connors comment "enables voltage dividers only when triggered"). the transistor is controlled by the Elmos E931.96 PIR motion controller IC. The latter is programmable by the IKEA TRÅDFRI ICC-1 module's EFR32MG1P132F256GM32 MCU. E.g. 2. Blind Time Ignores motion after the interrupt output is switched back to 0 Range: 0.5s... 8s. The blind time is [Register Value] *0.5s 3. Programmable pulse counter 1... 4 pulses with sign change in between Amount of pulses = [Register Value] + 1 4. Window time For noisy environments 2s... 8s window Window time = [Register Value] * 2s + 2s https://github.com/basilfx/TRADFRI-Hacking gives a good overview on that. What is the issue with tose 60s?
• 

  Smart Speakers
  • ejlane  

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  @ejlane Correct. 7 nodes = 7 machines. BUT, the 7 current machines are 7 raspberry pi 4 (8gig Ram) modules. it is 1/2 of what my goal is. Eventually it will be a full 14 node cluster. I had been doing something similar with the pi satellites. I found that if you tell it to use a UDP broadcast to localhost for the wakeword/recording then it doesn't send the audio frames to the mqtt broker.
• 

  New Attiny1614 /3224 /3226 Support?
  • Mr_nanick  

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  Main problem (already "quickfix" solved) is completely new and incompatibile interrupt system implemented in new (post-2016) ATtinys. More flexible, but also coming with some problems when using Arduino-like code and few libraries. Other than that, due to completely new power management these features I don't tested yet, may not work properly...
• 

  CR2032 coin cells - expected life?
  • sundberg84  

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  @Michiel-van-der-Wulp using a megaohms pull-up resistor solves the problem with current consumption, but now you have an input that is more susceptible to interference, because it is high impedance.
• 

  FODY E42 sensor for Tempus Pro E41 Thermo-hgyro sensor 868 MHz wireless
  • Noop  

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• 

  DIY zigbee sensor?
  • martin3000  

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  @martin3000 I just noticed that PTVO firmware does support the "serial bootloader": Anyway this feature is not documented too well.
• 

  Double SPI Radio Raspberry Pi
  • TriXwooD  

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  @TriXwooD said in Double SPI Radio Raspberry Pi: dtparam=spi=on dtoverlay=spi1-1cs,cs0_pin=36 @TriXwooD : Thank you, this helped me a lot. I had to use a different pin number in /boot/cmdline.txt though for that it matches the pin number given in the configure statement: dtparam=spi=on dtoverlay=spi1-1cs,cs0_pin=16 ./configure --my-rf24-cs-pin=36 ... Configure wants the BCM pin number (36), but the dtoverlay wants the corresponding GPIO pin number (16).
• 

  Private BLE Beacons with nRF52840
  • ProfRob  

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  Update Meanwhile I made progress with my project. Together with some colleagues I want to install a real-time measurement system with more than 30 channels (i.e. 30 Nano BLE 33 measuring accel. and gyro.) and one evaluation unit (another Nano BLE 33 combined with other computers). The 6 values (2*x,y,z) of 16 Bit each shall be transmitted with 10 measurements per second. Instead of spontaneous sending beacons with new measurement values from the 30 devices (to many collisions, real-time simply not possible) I use a master-slave polling, done by the evaluation unit. And I continue using non-connectable/non-scannable BLE-Beacons, for the request messages and for the response messages. Meanwhile, my beacons can be detected by typical BLE scanner APPs on my smartphone (Android 10). I do not know, why that did not work at the beginning. May be I corrected some mistakes incidentally in the last months. I am working also on a channel hopping (in case of disturbances by other devices with BT and WLAN) and using more channels for higher measurement speed. But the implementation of that will start later. 8 hours later Now I found a reason for the behavior of the Scan-APPs: My request beacons (without data, only user address of 6 bytes) are detected, but not the response beacons with data. I do not need the smartphones now (the speed of about 500 beacons per second is to fast for them), so I am happy with my solution.
• 

  RC-SPC1K capacitive rain sensor
  • TheoL  

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  @Jodaille Thanx for the link to the project. I think I'll order one of those sensors this weekend. As I hope it can also send the amount of rain that is falling. I do have to check the optical sensor. But I really like the heating in the controlli sensor
• 

  Mysensors and BSFrance Lora32u4 ii
  • CarloMagno  

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  I can confirm the solution posted by FarmerEd works for me. I was able to transmit from a Lora32u4 ii (node) to a TTGO Lora32 gateway. As pointed in his post, the right line was: #define MY_RFM95_IRQ_NUM digitalPinToInterrupt(7) instead of #define MY_RFM95_IRQ_NUM MY_RFM95_IRQ_PIN or #define MY_RFM95_IRQ_NUM 7 Thanks very much again for taking the time to post the solution.
• 

  Glowing/pulsing yellow LED?
  • raptorjr  

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  @raptorjr said in Glowing/pulsing yellow LED?: MKRNB 1500 It helps if you post a wiring diagram and a sketch.
• 

  Where to buy senserbender from spain
  • Danielo Rodríguez  

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  advise to buy a noob PCB
  • Danielo Rodríguez  

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• 

  [SOLVED] MQTT gateway based on Arduino Uno - Uno compatible W5100 Ethernet shield - RFM69HW radio
  • evb  

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  Well, it could be that the issue is the voltage regulator on the Arduino board. The higher the input voltage, the more power/heat that needs to be burnt at the voltage regulator. Maybe it's self-limiting because it's getting too hot? The Arduino website lists this part as the voltage regulator: https://www.mouser.com/datasheet/2/146/SPX1117-1889129.pdf On page 6 it claims a thermal resistance to ambient of 46 degrees/W. If you're using 1A and have 12V input then you're dropping 7W across the regulator. This is a temp rise at the junction of 322 degrees over ambient, which it obviously won't do. The datasheet also says that it's internally regulated and will current limit at 155C. Assuming 25C ambient, this only leaves a margin of ~2.8W that can be dropped over the regulator. So you'd have problems with any more than around 400mA. To have a safety margin, I wouldn't plan on more than 300mA or so, or maybe even down more towards 200. This voltage regulator is a nice, low dropout one, so if you could power it from a supply that gave it 6 or 7V instead of the 12 that would give you a ton more thermal margin and the regulator could then allow a lot more current through.
• 

  Questions about FS1000A and MX-RM-5V RF transmitter/receiver
  • HisDudeness  

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  @virtualmkr Oh, man. Here in Italy too, AFAIK. So, it would be a good idea to add it? Is it really just a coiled copper wire that I can do myself? Also, is the knob to calibrate the frequency?
• 

  Seeeduino Xiao
  • workshopninja  

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  @workshopninja Yes, this is basically what I did with an Arduino MKR1000 WIFI some years ago. There are some #defines for the EEPROM in the code. But for me it worked out of the box with a 24LC32P. See also in the MyS lib code: hal/architecture/SAMD/MyHwSAMD.h#L47 But in the end I switched to the ESP8266 because it also has WiFi and is much cheaper. The support for external libraries is also much better than with the SAMD.
• 

  Read the Digoo DG-R8H temp/humidity sensor
  • DenisJ  

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  @DenisJ yes I will take them , please send me your email so we can arrange this
• 

  My Wemos D1 mini adventures - Interrupts on pins D3 and D4
  • TheoL  

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  While we're at this topic. Does any one know what the NRF24L01+ does with it's interrupt pin? I'd like to hook it up to the other pin - d4 in this case. Does it pull high when there's a new message or is it pulled up by default? Which I hope
• 

  My 32bits ATSAM node project
  • scalz  

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  @scalz Hi, i know its been long time but stil l!!! Can u please explain how it got resolved?
• 

  RFM69 and ATMega 32U4
  • PHIL63  

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  Sck = 15 Miso = 14 Mosi = 16 You choose SS and IRQ from available gpio
• 

  AM312 with no delay
  • halipte  

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  @halipte Yes, you are right. The AM312 is different from the AS312 which I use. see: AM312 Datasheet and AS312 Datasheet But both are looking similar. No additional parts are required. For the HC-SR501 PIR there are a lot of additional parts on the module PCB. So at the end I prefer the AS312 to keep my PIR sensor device small and simple.
• 

  ESP8266 as (MQTT) Gateway with I2C Sensors
  mysensors • • Sunseeker  

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  @Sunseeker According to the Connecting the Radio page, D2 is the default pin for the CE signal for the NRF24. If you'd like to use this pin for I2C, you can free it up by assigning a different pin for the CE signal by adding this line to your sketch: #define MY_RF24_CE_PIN pin IIRC, all available pins should work for this purpose (D0, D3, D4). Just pick one and if it doesn't work, use one of the other pins. Please make sure to add that line before #include <MySensors.h>.
• 

  Misol rain gauge tipping bucket rain amount
  • รอเรือ  

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  Old topic, but my test shows .304mm per tip. I calculated the surface area as 54.7854cm^2, which is 5cm x 11cm minus the small rounded corners. I slowly poured 60cc water and counted 36 tips. Thus, spread out over the whole surface, I poured 1.09518cm of water, divided by 36 tips equals .3042173mm per tip.
• 

  STM32L0 support
  • Marcell Gerzsenyi  

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  @tekka Is there something I could help to spped up merging STM32duinoUpdate branch into master ? At the moment I have couple of blue pill boards (STM32F103C8) and want to test RS485 network with MySensors. And that I have one question, Is it possible to use two hardware serial ports - one for rs485 and another for debug prints ? What I tried is: using AltSoftSerial for rs485 but STM32 platform is not supported there using #define MY_RS485_HWSERIAL Serial1 and #define MY_DEBUGDEVICE Serial2 but Serial2 does not exist using SoftwareSerial but it seems that the code hangs somwhere and does not even get into setup() function (SoftwareSerial uses some timers so maybe they interferre with MySensors)
• 

  I am planning to use this PCB to power 8 x Servo motors consuming max 850mA each so around 7A Peak, I see the PCB is designed for a 1,8A max, do you think it makes any sense ?
  • veynacal  

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• 

  12V distribution box - mysensorized!
  • activemind  

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  Just a quick thought, but would it be preferable to attach something like this to the PCB using connections for current measurement rather than the ACS chip? Modules have the benefit of being optional, so you can skip them if you don't want them on a certain channel. In other words, it is conceivable to have 4 out of 5 channels that report and 1 that doesn't, for example. Because the cost of the module and chip are same, I don't believe there is any difference from a financial standpoint. -AM
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  New esp32 board with more io pins, compatible with d1 mini
  • mfalkvidd  

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• 

  LED Strip: Heat vs. Waterproofing
  • johnyradio  

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  Even if there are quite a few differences between these two types, plus they have not only different shape, but also the raw material is different
• 

  Building a gateway with two transport layers
  gateway serial rs485 rf24 wireless communication wired transport layer • • Giovanni Chiva  

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  @mfalkvidd thank you very much for your quick answer! I'll look into that.
• 

  Raspberry as a node (bis)
  • ben999  

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  @ben999 said in Raspberry as a node (bis): Does it stay local within the LAN (and gets directly to my gateway) or does it have to travel through internet up to openhab and down again to my gateway (remember, my bell has to ring) ? You run an MQTT broker ('server') somewhere in your local network (or even on your pi) that takes care of distributing the data. Not saying you need MQTT, only that it works marvellous for me. So last question just to be sure : it is not common practice to use RPi as a node ? And there is no "sketch" ready made that can be tweaked ? Not to my knowledge, but as all platforms supported by mysensors can be turned into nodes, this should also work for a pi.
• 

  Orange Pi Stability
  • chamroeun ou  

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  yes if the creator is still around Please could you possibly give a circuit diagram please just clear things up
  • clivec  

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  @mutantx Is there something lacking from the circuit diagram on the openhardware page? I'm not the original creator, but it seems like everything is on there. https://www.openhardware.io/uploads/58f4f976bacb0bcc79a15e93/394/DFPlayer_NRF_ProMini2_4.5V_Steckplatine.png
• 

  TGS8100 code?
  • fsbmaster  

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  Mysensors node to poll Modbus device ?
  • Redguy  

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  @Redguy Did you succeed talking modbus and sending to mysensors network ? I have a small mysensors over rs485 network and would like to add this device : https://fr.aliexpress.com/item/4000478781091.html?spm=a2g0o.cart.0.0.1d513c00qfPO3K&mp=1 it would be convinient to use the same cables, ideally the gateway could make the translation directly.
• 

  Reading out Modbus with MySensors
  • dzjr  

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  Hello friend, any progress on this ? I plan to buy a power meter and it would be awesome to read it over my existing rs485 mysensors network ? can mySensors and modBus protocol coexist on the same physical line ?
• 

  mkr1010 and NRLF24L01
  • omarrxa  

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  @omarrxa sure, now you're using identical radios
• 

  Sensor for detecting the presence of jacketed wire
  • alec44  

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  @gregvp Hi gregvp, thanks. The wire moves both axially and radially. It is being reeled and unreeled continuously. About 100 inches per second axially, much slower radially. It moves about 30 feet, close to its full length. It is a stranded wire, about 1mm thick. It's in a very accessible place. No such big environmental considerations. It doesn't connect anything, everything can be altered except the wire itself. It is not possible to inject a signal because I can't cut into its protective coating, just to avoid the coating stripping off during such a long test. It doesn't carry any signal, it's just part of the physical device. It has an aluminum testing apparatus that we can alter in any way. We just need to know when the wire breaks, if it ever does. Thanks for your interest in this problem. I'm hoping this helps give people any ideas that might be feasible. I think we might try a laser but I'm concerned the receiving window will be too small. We'll see though
• 

  anyone can tell me what this Hardware/Sensor/Module is?
  • ANTaro  

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  @Nca78 Thank you so much for your time, i didn't use the stepper motor yet and so i didn't pay attention to what came with it, thank you very much.
• 

  Wake-up by interrupt doesn't work
  • Max Kurilov  

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  @electrik said in Wake-up by interrupt doesn't work: If the delay is not of importance to you, you can also have the sensor request its state from the controller each time it wakes up. No special modifications are needed than. It's true. But the controller must switch its relay state without having ack received from the node. That's not what MySensors plugin for Vera does. But you gave me an idea to implement an additional relay buildin into the gateway which will work as a proxy for my real actuator. Thank you!
• 

  Second setup, choosing a radio
  • projectMarvin  

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  @projectMarvin here's the next gen project that is actually a HW sensorTag but also mainly an nRF52840 firmware compatible with openthread and my previous gen simple mesh framework. The openthread is quite simple as you no longer have to worry about app layer when using directly json from the uC https://www.homesmartmesh.com/docs/microcontrollers/nrf52/thread_sensortag/
• 

  Ebyte nRF24 module comparison (2020)
  • sola  

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  I have built 2 nodes with E01-ML01S (the cheapest module) and I have pretty good experience with them so far. I didn't have to use any capacitors to improve range, they are directly connected to some medium-quality Arduino Nano GND/3.3V. One of them is a lighting controller node, ~3 meters from the PA/LNA gateway (+ a 30cm wall) on the same level as the gateway. The other one is a repeter node and is ~10 meters from the gateway (+ a 20cm wall, same level as the gateway). In this case, radio orientation was important to get a good signal. One of the test modules could communicate with the gateway through 2 walls and a the ceiling (steel-bar reinforced). All-in-all, I am satisfied with the signal stability of these modules. It is a bit finicky to solder the wires to the module because the pads are very small. I always put some solder on the pads first and reheat when I attach the wires.
• 

  APDS9960 - Gesture Sensor and MySensors Sleep
  • Westie  

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  I did more investigation played around with sleep outside of mysensors and found a bit of code in a proximity sensor example: // Reset flag and clear APDS-9960 interrupt (IMPORTANT!) isr_flag = 0; if ( !apds.clearProximityInt() ) { Serial.println("Error clearing interrupt"); } I then needed to play around with delays to allow the sensor to catchup.. void loop() { delay(1000); Recoding back to MySensors if ( !apds.clearProximityInt() ) { Serial.println("Error clearing interrupt"); } wakeupReason = sleep(digitalPinToInterrupt(INT_PIN), FALLING, sleepTime); setting up the interrupt pin with a pullup forced the FALLING when pin dragged down by the sensor. void setup() { pinMode(INT_PIN, INPUT_PULLUP); All this is on caveat it makes it through some more testing.
• 

  Sleep for SAMD, STM32 ?
  • KevinT  

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  @mfalkvidd Good point. I don't know too much about the library, but if that's all it takes, I'll definitely try it.
• 

  Solar/battery powering
  • epierre  

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  @skywatch said in Solar/battery powering: @zboblamont said in Solar/battery powering: @rejoe2 Anti-freeze. But then the hot water would not be suitable to shower/cleaning/pool etc and you then have to go to a heat exchange tank, somewhere to put it and insulate it and pipe to it. I am sure is can be done, but the fact that it is not 'standard' hints at it being costlly or impractical or both. In fact, imo it's highly recommended to use a seperate circle for the "transport medium" (typically: antifreeze liquid)! Otherwise you will at some point in time get problems with corrosion or deposited dirt particles if media would be continuously renewed. Dependent on the needed amounts of (potable) warm water, it might even be a good idea to have three circles (medium for panel, heating water, potable water). But tanks, heat exchangers and so on (including steering electronics ) are (relatively inexpensive) standard components - at least here in Germany. So imo technical complexity isn't a thing to worry about too much. But as already mentionned: I really doubt, if you will have a financial benefit out of such an installation, if you have to built it from scratch nowerdays. Additionally: have a close look, how big the need for hot water really is - in most cases, e.g. 5m² panel size for a family of 4 persons should be enough for hot water supply in middle Europe (+300l tank volume). As soon as heating is involved, you'll need much higher tank volumes - with no benefit in summer, but not sufficient capacity on roof top or tank volume in winter times? @rejoe2 Agreed! - But it's not OT as you could mysensors the hell out of such an installation! Indeed, buiding one's own MySensors-based controller for such a hybrid heating ecosystem would be right on topic - but not in this thread here... Fyi: One of my very first things to get done with MySensors had been around my (gas based) central heating system; we have some tubes installed that would allow medium transport from roof to cellar. But to be honest, atm. I'm not willing to invest in tanks etc.; it's just not cost efficient, even if I would do a lot of the installation work myself....
• 

  Tell Me How To choose the right solar lights
  • lucasbaby  

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  What are you trying to do? Remotely control store-bought solar lights?
• 

  Water level measurement - Ultrasonics V Pressure
  • zboblamont  

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  @CrankyCoder A third the volume I'm looking at, but in your case no pump issues. Perhaps you might have a look at some of the less industrial sensors for what you want - a little differential sensor from Digikey on the end of a some poly pipe to a bib connex on the water line might give you all the info you need, ready compensated against atmosphere...
• 

  head's up: LGT8F328P is allegedly a chinese clone of the atmega328p
  • NeverDie  

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  I have done some test on LGT8F328P-SSOP20 years ago. It may drop down to ~50uA under sleep mode. You may found the lgt8f branch in https://github.com/arcayi/mysensors/tree/lgt8f, which unfortunately was not accepted by master.
• 

  MySensors on Apple AirTags?
  • mfalkvidd  

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  That's a great idea.
• 

  Feather M0 RFM69 433MHz
  • zboblamont  

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• 

  This topic is deleted!
  • Vertorix  

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  Testing battery level with regulator removed
  battery • • 4994james  

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  @4994james or just use internal vcc measurement as described on the same page. That saves you the voltage divider. I wrote a convenient library to measure vcc internally : https://github.com/Yveaux/Arduino_Vcc
• 

  Acceleration sensor > measurement dependant on frequency
  • SimonHW2021  

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• 

  Stove burner detection
  • nagelc  

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  There was a similar discussion over on the Blynk forum a few years ago, which might be worth reading.... https://community.blynk.cc/t/gas-stove-safety/17331 Pete.
• 

  Everything nRF52840 Compile Question
  • mmarks3141  

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  Hello @mmarks3141, I am just learning about nRF52840. My IDE is Eclipse/Sloeber and Arduino NANO BLE 33. And I do not want to use the mbed-OS, because it destroys the timing of my self developed libraries running on any Arduino-Board. Your question is about using a serial interface, which depends on the firmware of your board. If it is mbed-OS, please look to the documentation of mbed: https://os.mbed.com/handbook/Serial. If it is not mbed-OS, look for the resources of Your boards firmware/libraries. For me (Arduino), it would be the initialization with Serial.begin(bitrate) in setup() and using Serial.print() for the output somewhere in loop(). By the way, thanks to @NeverDie for the examples.
• 

  Which magnetic door/window switch for battery powered projects?
  • maddhin  

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  @skywatch said in Which magnetic door/window switch for battery powered projects?: @maddhin You attach the 'large resistor' on the ATmega board from ground to input pin used for interrupt. Then connect the same input pin to 3V via the reed relay switch contacts that are OPEN when the door/window/letterbox is in the untripped (closed) position. If you use the sketch on here you need to reverse the tripped/untripped (open/closed) as the basic sketch is negative triggered and this way it is positive triggered - sorry, it took me a while to get back to this project as finally all parts for my slim nodes arrived and I first had to tinker with the temp sensor:) The NC door switch is working now - although I did connect the large resistor with VCC and pin and connected the switch with pin and GND. The other way around didn't seem to work for me. Here is my sketch for other people having similar issue or for comments (improvements always welcome!). /** * The MySensors Arduino library handles the wireless radio link and protocol * between your home built sensors/actuators and HA controller of choice. * The sensors forms a self healing radio network with optional repeaters. Each * repeater and gateway builds a routing tables in EEPROM which keeps track of the * network topology allowing messages to be routed to nodes. * * Created by Henrik Ekblad <henrik.ekblad@mysensors.org> * Copyright (C) 2013-2015 Sensnology AB * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors * * Documentation: http://www.mysensors.org * Support Forum: http://forum.mysensors.org * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * ******************************* * * DESCRIPTION * * Simple binary switch example * Connect button or door/window reed switch between * digitial I/O pin 3 (BUTTON_PIN below) and GND. * http://www.mysensors.org/build/binary * * Connect normally closed (NC) door sensor: * VCC <--> 3.3M ohm resistor <--> pin D3 * GND <--> NC door sensor <--> pin D3 * REVISION HISTORY * v1.0: Example at https://www.mysensors.org/build/binary * v1.01: Maddhin * v1.03: first working version * */ #define SKETCH_NAME "DoorSen_NC" #define SKETCH_VERSION "1.03" //<--------- UPDATE version nummer!!! // Enable debug prints #define MY_DEBUG //<--------- switch DEBUG mode on/off // Enable REPORT_BATTERY_LEVEL to measure battery level and send changes to gateway #define REPORT_BATTERY_LEVEL // Enable and select radio type attached #define MY_RADIO_RF24 //#define MY_RADIO_RFM69 //#define MY_RS485 #define MY_NODE_ID 101 //#define MY_PARENT_NODE_ID 0 //#define MY_PARENT_NODE_IS_STATIC //#define MY_RF24_PA_LEVEL RF24_PA_MAX #include <MySensors.h> //#include <Bounce2.h> //#define CHILD_ID_HUM 0 //#define CHILD_ID_TEMP 1 #define CHILD_ID_VOLT 2 //Door sensor #define CHILD_ID_DOOR 3 #define BUTTON_PIN 3 // Arduino Digital I/O pin for button/reed switch #define ONE_DAY_SLEEP_TIME 86400000 // report battery status each day at least once //Bounce debouncer = Bounce(); int oldValue=-1; // Change to V_LIGHT if you use S_LIGHT in presentation below MyMessage msg(CHILD_ID_DOOR,V_TRIPPED); // Sleep time between sensor updates (in milliseconds) static const uint64_t UPDATE_INTERVAL = 5*60000; // x * 1 min //for debugging: //static const uint64_t UPDATE_INTERVAL = 5000; /*#include "Adafruit_HTU21DF.h" Adafruit_HTU21DF sensor = Adafruit_HTU21DF(); // Set this offset if the sensor has a permanent small offset to the real temperatures #define SENSOR_TEMP_OFFSET 0 */ #ifdef REPORT_BATTERY_LEVEL #include <Vcc.h> static uint8_t oldBatteryPcnt = 200; // Initialize to 200 to assure first time value will be sent. const float VccMin = 1.8; // Minimum expected Vcc level, in Volts: Brownout at 1.8V -> 0% const float VccMax = 2.0*1.6; // Maximum expected Vcc level, in Volts: 2xAA fresh Alkaline -> 100% const float VccCorrection = 1.0; // Measured Vcc by multimeter divided by reported Vcc static Vcc vcc(VccCorrection); #endif #ifdef MY_DEBUG #define DEBUG_PRINT(x) Serial.print (x) #define DEBUG_PRINTDEC(x) Serial.print (x, DEC) #define DEBUG_PRINTLN(x) Serial.println (x) #else #define DEBUG_PRINT(x) #define DEBUG_PRINTDEC(x) #define DEBUG_PRINTLN(x) #endif void setup() { /*// Temp Hum Sensor while (!sensor.begin()) { DEBUG_PRINTLN(F("Sensor not detected!")); while(1); delay(5000); }*/ //Door Sensor // Setup the button pinMode(BUTTON_PIN,INPUT); // Activate internal pull-up digitalWrite(BUTTON_PIN,HIGH); /*// After setting up the button, setup debouncer debouncer.attach(BUTTON_PIN); debouncer.interval(5); */ } void presentation() { // Send the sketch version information to the gateway and Controller DEBUG_PRINT("SKETCH NAME: "); DEBUG_PRINT(SKETCH_NAME); DEBUG_PRINT(", VERSION: "); DEBUG_PRINTLN(SKETCH_VERSION); sendSketchInfo(SKETCH_NAME, SKETCH_VERSION); // Present sensors as children to gateway //present(CHILD_ID_HUM, S_HUM, "Humidity"); //present(CHILD_ID_TEMP, S_TEMP, "Temperature"); present(CHILD_ID_VOLT, S_MULTIMETER, "Voltage"); // Register binary input sensor to gw (they will be created as child devices) // You can use S_DOOR, S_MOTION or S_LIGHT here depending on your usage. // If S_LIGHT is used, remember to update variable type you send in. See "msg" above. present(CHILD_ID_DOOR, S_DOOR); } void loop() { /*// Read temperature & humidity from sensor. const float temperature = float( sensor.readTemperature() ); const float humidity = float( sensor.readHumidity() ); DEBUG_PRINT(F("Temp ")); DEBUG_PRINT(temperature); DEBUG_PRINT(F("\tHum ")); DEBUG_PRINTLN(humidity); static MyMessage msgHum( CHILD_ID_HUM, V_HUM ); static MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); send(msgTemp.set(temperature, 1)); send(msgHum.set(humidity, 1)); */ //Door sensor /* debouncer.update(); // Get the update value int value = debouncer.read(); */ int value = digitalRead(BUTTON_PIN); //DEBUG_PRINT("digitalRead PIN: "); //DEBUG_PRINTLN(value); wait(50); // "debouncing" //if (value != oldValue) { if (value != oldValue) { // Send in the new value DEBUG_PRINT(F("DOOR SENSOR: ")); DEBUG_PRINTLN(value==HIGH ? 1 : 0); send(msg.set(value==HIGH ? 1 : 0)); oldValue = value; } #ifdef REPORT_BATTERY_LEVEL const uint8_t batteryPcnt = static_cast<uint8_t>(0.5 + vcc.Read_Perc(VccMin, VccMax)); static MyMessage MsgVolt(CHILD_ID_VOLT, V_VOLTAGE); // Node voltage DEBUG_PRINT(F("Vbat ")); DEBUG_PRINT(vcc.Read_Volts()); DEBUG_PRINT(F("\tPerc ")); DEBUG_PRINTLN(batteryPcnt); // Battery readout should only go down. So report only when new value is smaller than previous one. if ( batteryPcnt < oldBatteryPcnt ) { send(MsgVolt.set(vcc.Read_Volts(),2)); sendBatteryLevel(batteryPcnt); oldBatteryPcnt = batteryPcnt; } #endif // Sleep until next update to save energy //sleep(UPDATE_INTERVAL); sleep(BUTTON_PIN-2, CHANGE, ONE_DAY_SLEEP_TIME); } Now, I'll look into adding a second door switch onto the same 328P and hope I have a neat letterbox sensor up and running soon... Power consumption I will have to monitor though. But I don't really know how to measure the sleep / send current. I guess I should build some INA219 based monitor or similar. I guess, for the moment, I just "hope" the setup is good and I'll see how long the batteries will last. After running for ~24h and having triggered a bunch of times, the voltage didn't seem to have changed, so I guess that is good news... Thanks for your help, guys!
• 

  [SOLVED] s17021 vs HTU21
  temperature • • 4994james  

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  @4994james great to hear you solved it, and thanks for reporting back!
• 

  HTU21D Humidity/Temperature Sensor
  • Talisker  

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  @maddhin Any version 2 sketch with HTU21D should work as slim node is atmgea328 based. I use adafruit lib for mine and it works well. To conserve battery energy follow all the steps on the battery power page in here and send data as infrequently as you can for your needs. here is the code I use to test with - you can safely remove all the "force n updates" to reduce memory use ( I always do). It also only send if the temp or hum has changed since last reading to further reduce battery consumption.... /** * The MySensors Arduino library handles the wireless radio link and protocol * between your home built sensors/actuators and HA controller of choice. * The sensors forms a self healing radio network with optional repeaters. Each * repeater and gateway builds a routing tables in EEPROM which keeps track of the * network topology allowing messages to be routed to nodes. * * Created by Henrik Ekblad <henrik.ekblad@mysensors.org> * Copyright (C) 2013-2015 Sensnology AB * Full contributor list: https://github.com/mysensors/Arduino/graphs/contributors * * Documentation: http://www.mysensors.org * Support Forum: http://forum.mysensors.org * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * version 2 as published by the Free Software Foundation. * ******************************* * * REVISION HISTORY * Version 1.0: Andrew Sutcliffe * * DESCRIPTION * This sketch provides an example of how to implement a humidity/temperature * sensor using a HTU21DF Sensor. * * For more information, please visit: * http://www.mysensors.org/build/humidity * * Connect Vin to 3-5VDC * Connect GND to ground * Connect SCL to I2C clock pin (A5 on UNO) * Connect SDA to I2C data pin (A4 on UNO) * */ // Enable debug prints #define MY_DEBUG // Enable and select radio type attached #define MY_RADIO_NRF24 //#define MY_RADIO_RFM69 //#define MY_RS485 #include <MySensors.h> #include <Wire.h> #include "Adafruit_HTU21DF.h" Adafruit_HTU21DF htu = Adafruit_HTU21DF(); // Set this offset if the sensor has a permanent small offset to the real temperatures #define SENSOR_TEMP_OFFSET 0 // Sleep time between sensor updates (in milliseconds) static const uint64_t UPDATE_INTERVAL = 15*60000; // Force sending an update of the temperature after n sensor reads, so a controller showing the // timestamp of the last update doesn't show something like 3 hours in the unlikely case, that // the value didn't change since; // i.e. the sensor would force sending an update every UPDATE_INTERVAL*FORCE_UPDATE_N_READS [ms] static const uint8_t FORCE_UPDATE_N_READS = 10; #define CHILD_ID_HUM 0 #define CHILD_ID_TEMP 1 float lastTemp; float lastHum; uint8_t nNoUpdatesTemp; uint8_t nNoUpdatesHum; bool metric = true; MyMessage msgHum(CHILD_ID_HUM, V_HUM); MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); void presentation() { // Send the sketch version information to the gateway sendSketchInfo("HTU21DF-TemperatureAndHumidity", "1.0"); // Register all sensors to gw (they will be created as child devices) present(CHILD_ID_HUM, S_HUM); present(CHILD_ID_TEMP, S_TEMP); } void setup() { Serial.begin(9600); Serial.println("HTU21D-F test"); if (!htu.begin()) { Serial.println("Couldn't find sensor!"); while (1); } } void loop(){ // Get temperature from HTU21DF library float temperature = (htu.readTemperature()); if (temperature != lastTemp || nNoUpdatesTemp == FORCE_UPDATE_N_READS) { // Only send temperature if it changed since the last measurement or if we didn't send an update for n times lastTemp = temperature; // Reset no updates counter nNoUpdatesTemp = 0; temperature += SENSOR_TEMP_OFFSET; send(msgTemp.set(temperature, 1)); #ifdef MY_DEBUG Serial.print("T: "); Serial.println(temperature); #endif } else { // Increase no update counter if the temperature stayed the same nNoUpdatesTemp++; } // Get humidity from HTU21DF library float humidity = (htu.readHumidity()); if (humidity != lastHum || nNoUpdatesHum == FORCE_UPDATE_N_READS) { // Only send humidity if it changed since the last measurement or if we didn't send an update for n times lastHum = humidity; // Reset no updates counter nNoUpdatesHum = 0; send(msgHum.set(humidity, 1)); #ifdef MY_DEBUG Serial.print("H: "); Serial.println(humidity); #endif } else { // Increase no update counter if the humidity stayed the same nNoUpdatesHum++; } // Sleep for a while to save energy sleep(UPDATE_INTERVAL); } Hope it helps you get up and running.
• 

  PCB verification request for latching valve controller
  • wrendral  

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  Hello, Thanks for all your comments!! I will implement all your improvement this weekend. I come back quickly.
• 

  RFM95 config for receive packet bigger than FIFO
  • MAJSTER XXL  

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  BME280 Temp Sensor Problem - Min Power Up Time? Min Time To Get First Reading?
  • Mahonroy  

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  hi, i'm making something similar to yours, i know a lot of time has elapsed, but i'll input my knowledge. For your problem it has to do with how the data you are collecting is saved and the configuration for taking measurements you are using. You probably are using a pull measurement, instead of constant measurement. So the device will give you the data saved in register, before taking a new measurement. For example if you take a measure every 1hour, without turning off, it will give you the measurement of the preview hour each time you request for data. This is common in a lot of systems with registers. So your problem may be that when you turn on the device, there is garbage on the register. Thats why you have to do 2 measurements to get the actual value.
• 

  [SOLVED] STM32F103C8T6 bluepill clone - RFM69HW SPI port 1 and ILI9341 SPI port 2 not working together
  • thom4s  

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  @thom4s said in [SOLVED] STM32F103C8T6 bluepill clone - RFM69HW SPI port 1 and ILI9341 SPI port 2 not working together: o myself. Problem were in wrong definition of IRQ pin in sketch. But, as I found out STM32F103C8T6 has SPI 1 running on 72MHz (for SPI max 72/2 = 36MHz) and SPI 2 36MHz (for SPI max 36/2 = 18MHz) so it were a stupid idea to wire TFT display to SPI 2 port which is slower than SPI 1 with RFM69HW which doesnt need so fast SPI. Therefore I switched radio to SPI-2 and TFT display to faster SPI-1. Radio SPI-2 and TFT ILI9341 SPI-1 wiring I'm having the same problem with NRF24L01 + ILI9341. TFT is on the SPI2 , its working but NRF24L01 on SPI1 doesnt work the moment i call tft.begin. Its not hardware related. something is wrong when i initialize the spi in the Adafruit_ILI9341_STM::begin Any thoughts?
• 

  New simply node sensor project - please some advise
  • DenisJ  

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  Oh boys... a lot of information here. Thanks so much... but I've already place the pcb order... I have make an order for 10 pieces. Bun in the mean time I'll experiment and modify the schema thanks to you all Anyway I have placed there this capacitor ... I hope will be ok for this time. Thanks so much for all information Denis
• 

  MySensors Linky no data
  • Pieter  

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  Battery life calculator
  • DenisJ  

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  @BearWithBeard said in Battery life calculator: you'd wake up every 30 seconds instead of once every 2 minutes. Whoawwww... I had entered wrong times Now I take 409 days... great !!! Thanks a lot again Denis
• 

  SX 1278 LORA
  • aliazizolahy  

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• 

  What I must buy in order to measure mAh please
  • DenisJ  

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  I already have something like this, but this one have no misurement in uAh Thanks a lot Denis
• 

  Please give me an advice for a simple sensor node
  • DenisJ  

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  @evb said in Please give me an advice for a simple sensor node: But the node will continue to work till 1.8V in a safe operating area. Yeah sure, but alkaline batteries are nearly depleted when they get to 1V, so barely worth the hassle.
• 

  Heltec esp32 LoRa oled
  • hyla  

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  @mrussi I am also interested in using an esp32 with lora as the gateway. Did you make it work? I planning to buy, https://www.botnroll.com/en/esp/2979-esp32-wifi-bluetooth-lora-sx1278-433mhz-with-0-96-oled-display.html
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  Power management using Ebyte E32 LoRa modules
  • JabbaJoe  

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• 

  Selling: Temp, Hum Si7021
  • flopp  

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• 

  Possible securiy breach in ESPS.
  • TheoL  

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  @skywatch not really, depending on the algorithm
• 

  DIY RFM69 Build
  • wvdakker  

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  Thanks, yes. I have posted my question in that forum too. Found that G4C is sold by LCSC. A N83 replacement is found. Now just fabricating the schematic
• 

  nRF52840 Support on MySensors
  • phil2020  

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  @phil2020 look here: https://forum.mysensors.org/post/109039 You may find that useful.
• 

  RF Nano = Nano + NRF24, for just $3,50 on Aliexpress
  • alowhum  

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  How ever powering from usb is not very stable. When sending multiple messages with delays my sketch sometimes stalls. Need to test with the suggested 6v power supply though. But most nodes don't need to send multiple messages quickly
• 

  Raspberry Pi Ethernet Gateway with local sensors
  arduino raspberry pi ethernet gateway • • jvdk  

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  @jvdk I agree with the point made by @evb , why would you want to wire connect the ultrasonic node rather than the usual radio connection ? You are adding levels of complexity and power demands for what reason ? My ultrasonic water tank node (pro-mini+rfm69) is now 2 years on the same 2xAA batteries sending in levels every hour (RTC), the only problem encountered - condensation forming a drip on the face of the ultrasonic head during very low temperatures.
• 

  Project enclosures
  • haloway13  

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  This is my temperature-humidity-pressure sensor in a 1151v3wh enclosure.
• 

  Melexis Infrared Sensor MLX90614
  • User1404  

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• 

  IRQ D2 connection of NRF24L01+
  • FotoFieber  

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  @mfalkvidd Thanks - you are on fire today (that was quick reply)!
• 

  Teensy 3.2 and RFM69HW not working
  • Nigel31  

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  Hi, Well progress, and questions ! When I started this with the Teensy3.2, I used a RFM69CW (smaller pcb) device, and ran into the problems as detailed above. As part of the troubleshooting, I part assembled a "EASY PCB" which I have, to enable, hopefully proving a different radio module (RFM69HW) which is my normal radio module, and attempt to "tight fit" a Pro mini to header pins on the board, to "prove" the radio. This was sucessful, as mentioned above. Using this proven radio / assembly, I removed the Pro Mini, and jumpered to the Teensy with dupont cables, which got the radio "working" in the sense that the transport succeeded, it just couldn't find the parent / gateway. I mentioned above the possibility of connecting the reset pin, as I had the origional bare RFM69CW already to go, I soldered another wire to the reset pad, and utilised this at the radio, commenting out the #define MY_IS_RFM69HW . and adding the #define MY_RFM69_RST_PIN 9 . I uploaded this, and it found, and presented to the GW / Controller. BUT subsequent messages were met with "!MCO:SND:NODE NOT REG" as in the log below 300 MCO:BGN:INIT NODE,CP=RRNNT---,VER=2.2.0 300 TSM:INIT 300 TSF:WUR:MS=0 301 TSM:INIT:TSP OK 301 TSM:INIT:STATID=44 301 TSF:SID:OK,ID=44 301 TSM:FPAR 1529 TSF:MSG:SEND,44-44-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 1547 TSF:MSG:READ,0-0-44,s=255,c=3,t=8,pt=1,l=1,sg=0:0 1547 TSF:MSG:FPAR OK,ID=0,D=1 3530 TSM:FPAR:OK 3530 TSM:ID 3530 TSM:ID:OK 3530 TSM:UPL 3536 TSF:MSG:SEND,44-44-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1 3747 TSF:MSG:READ,0-0-44,s=255,c=3,t=25,pt=1,l=1,sg=0:1 3747 TSF:MSG:PONG RECV,HP=1 3747 TSM:UPL:OK 3747 TSM:READY:ID=44,PAR=0,DIS=1 4774 TSF:MSG:SEND,44-44-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=OK:0100 4985 TSF:MSG:READ,0-0-44,s=255,c=3,t=15,pt=6,l=2,sg=0:0100 6218 !TSF:MSG:SEND,44-44-0-0,s=255,c=0,t=17,pt=0,l=5,sg=0,ft=0,st=NACK:2.2.0 6234 TSF:MSG:SEND,44-44-0-0,s=255,c=3,t=6,pt=1,l=1,sg=0,ft=1,st=OK:0 6459 TSF:MSG:READ,0-0-44,s=255,c=3,t=6,pt=0,l=1,sg=0:M 7492 TSF:MSG:SEND,44-44-0-0,s=255,c=3,t=11,pt=0,l=9,sg=0,ft=0,st=OK:test Node 7502 TSF:MSG:SEND,44-44-0-0,s=255,c=3,t=12,pt=0,l=5,sg=0,ft=0,st=OK:1.0.0 7515 TSF:MSG:SEND,44-44-0-0,s=5,c=0,t=33,pt=0,l=14,sg=0,ft=0,st=OK:Motion RX RSSI 7729 TSF:MSG:READ,0-0-44,s=5,c=0,t=33,pt=0,l=14,sg=0:Motion RX RSS 7729 TSF:MSG:ACK +Ack FMGW *InMsgty :33 MsgComd:0 childID:5 Switch:0.00 7936 TSF:MSG:READ,0-0-44,s=5,c=0,t=33,pt=0,l=14,sg=0:Motion RX RSS 7936 TSF:MSG:ACK +Ack FMGW *InMsgty :33 MsgComd:0 childID:5 Switch:0.00 8141 TSF:MSG:READ,0-0-44,s=5,c=0,t=33,pt=0,l=14,sg=0:Motion RX RSS 8141 TSF:MSG:ACK +Ack FMGW *InMsgty :33 MsgComd:0 childID:5 Switch:0.00 8344 TSF:MSG:READ,0-0-44,s=5,c=0,t=33,pt=0,l=14,sg=0:Motion RX RSS 8345 TSF:MSG:ACK +Ack FMGW *InMsgty :33 MsgComd:0 childID:5 Switch:0.00 8937 TSF:MSG:SEND,44-44-0-0,s=4,c=0,t=1,pt=0,l=9,sg=0,ft=0,st=OK:Prescence 9149 TSF:MSG:READ,0-0-44,s=4,c=0,t=1,pt=0,l=9,sg=0:Prescenc 9149 TSF:MSG:ACK +Ack FMGW *InMsgty :1 MsgComd:0 childID:4 Switch:0.00 10225 TSF:MSG:SEND,44-44-0-0,s=6,c=0,t=30,pt=0,l=16,sg=0,ft=0,st=OK:Motion Battery V 10226 MCO:REG:REQ 10234 TSF:MSG:SEND,44-44-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=0,st=OK:2 10444 TSF:MSG:READ,0-0-44,s=255,c=3,t=27,pt=1,l=1,sg=0:0 10444 MCO:PIM:NODE REG=0 10445 MCO:BGN:STP 10445 MCO:BGN:INIT OK,TSP=1 Motion 0 10495 !MCO:SND:NODE NOT REG 10647 TSF:MSG:READ,0-0-44,s=255,c=3,t=27,pt=1,l=1,sg=0:0 10647 MCO:PIM:NODE REG=0 RAWbatcount :179 batV :0.74 batP :0 10850 TSF:MSG:READ,0-0-44,s=255,c=3,t=27,pt=1,l=1,sg=0:0 10850 MCO:PIM:NODE REG=0 10857 !MCO:SND:NODE NOT REG 10857 !MCO:SND:NODE NOT REG wait 10000 11258 TSF:MSG:READ,0-0-44,s=255,c=3,t=27,pt=1,l=1,sg=0:0 11258 MCO:PIM:NODE REG=0 Progress of a sort. I noticed however that in the Controller, each child presentation, including the MYSENSORS version was missing the last character. I have seen this sort of thing in entirely different situations with serial coms, baud rates mismatching slightly (due to processor speed dividing ratios), and I knew that out of the box, the teensy runs overclocked at 96Mhz, so I changed the speed of the processor, to 72Mhz, and uploaded, had the same results, Then I selected 48Mhz, and uploaded again, and Eureka, it all works. So in summary, I have wired in the Reset Pad to (in my case) Pin 9, and slowed the Processor to 48Mhz, and all is working. AFTER this, I have simplified the sketch, to be a incrementing count, in a txt field. Sketch as is NOW, but AFTER it was working // Enable debug prints #define MY_DEBUG #define MY_DEBUG_VERBOSE_RFM69 //#define MY_DEBUG_VERBOSE_SIGNING //#define MY_SIGNING_SOFT //#define MY_SIGNING_SOFT_RANDOMSEED_PIN 7 //#define MY_SIGNING_REQUEST_SIGNATURES #define MY_SPLASH_SCREEN_DISABLED //#define MY_DISABLE_RAM_ROUTING_TABLE_FEATURE //#define MY_TRANSPORT_WAIT_READY_MS 5000 // Enable and select radio type attached //#define MY_REPEATER_FEATURE #define MY_RADIO_RFM69 #define MY_RFM69_FREQUENCY RFM69_433MHZ // Set your frequency here #define MY_RFM69_MAX_POWER_LEVEL_DBM (14) // max. TX power 10dBm = 10mW #define MY_RFM69_TX_POWER_DBM (14) //#define MY_IS_RFM69HW // Omit if your RFM is not "H" #define MY_RFM69_IRQ_PIN 2 #define MY_RFM69_IRQ_NUM digitalPinToInterrupt(MY_RFM69_IRQ_PIN) #define MY_RFM69_CS_PIN 10 // NSS. Use MY_RF69_SPI_CS for older versions (before 2.2.0) #define MY_RFM69_RST_PIN 9 // try reset pin //#define MY_RFM69_ENABLE_ENCRYPTION //#define MY_RFM69_NETWORKID 100 // Default is 100 in lib. Uncomment it and set your preferred network id if needed #define MY_NODE_ID 45 //#include <MyConfig.h> #include <MySensors.h> long counter = 0; #define CHILD_ID_RX_RSSI 5 #define CHILD_ID_TEXT1 7 // Initialize message MyMessage msgRxRSSI(CHILD_ID_RX_RSSI, V_LEVEL); MyMessage msgText(CHILD_ID_TEXT1, V_TEXT); void setup() { // put your setup code here, to run once: analogReference(INTERNAL); }//end setup void presentation() { // Send the sketch version information to the gateway and Controller sendSketchInfo("test Node", "1.0.1"); present(CHILD_ID_RX_RSSI, S_SOUND, "Motion RX RSSI",true); wait(250); present(CHILD_ID_TEXT1, S_INFO,"UpdateTxt",false); }//end presentation void loop() { // put your main code here, to run repeatedly: counter++; send(msgText.set(counter), false); wait(10000);// wait a bit, then read in level, avoid spurious noise as PIR holds high state for 27sec RX_SEND(); wait(10000); }// end loop void RX_SEND() { send(msgRxRSSI.set(transportGetSignalReport(SR_RX_RSSI))); } Log NOW 300 MCO:BGN:INIT NODE,CP=RRNNT---,VER=2.2.0 300 TSM:INIT 300 TSF:WUR:MS=0 300 TSM:INIT:TSP OK 300 TSM:INIT:STATID=45 300 TSF:SID:OK,ID=45 300 TSM:FPAR 1520 TSF:MSG:SEND,45-45-255-255,s=255,c=3,t=7,pt=0,l=0,sg=0,ft=0,st=OK: 1604 TSF:MSG:READ,0-0-45,s=255,c=3,t=8,pt=1,l=1,sg=0:0 1604 TSF:MSG:FPAR OK,ID=0,D=1 3521 TSM:FPAR:OK 3521 TSM:ID 3521 TSM:ID:OK 3521 TSM:UPL 3527 TSF:MSG:SEND,45-45-0-0,s=255,c=3,t=24,pt=1,l=1,sg=0,ft=0,st=OK:1 3739 TSF:MSG:READ,0-0-45,s=255,c=3,t=25,pt=1,l=1,sg=0:1 3739 TSF:MSG:PONG RECV,HP=1 3739 TSM:UPL:OK 3739 TSM:READY:ID=45,PAR=0,DIS=1 3759 TSF:MSG:SEND,45-45-0-0,s=255,c=3,t=15,pt=6,l=2,sg=0,ft=0,st=OK:0100 3968 TSF:MSG:READ,0-0-45,s=255,c=3,t=15,pt=6,l=2,sg=0:0100 3983 TSF:MSG:SEND,45-45-0-0,s=255,c=0,t=17,pt=0,l=5,sg=0,ft=0,st=OK:2.2.0 3994 TSF:MSG:SEND,45-45-0-0,s=255,c=3,t=6,pt=1,l=1,sg=0,ft=0,st=OK:0 4024 TSF:MSG:READ,0-0-45,s=255,c=3,t=6,pt=0,l=1,sg=0:M 4050 TSF:MSG:SEND,45-45-0-0,s=255,c=3,t=11,pt=0,l=9,sg=0,ft=0,st=OK:test Node 4066 TSF:MSG:SEND,45-45-0-0,s=255,c=3,t=12,pt=0,l=5,sg=0,ft=0,st=OK:1.0.1 4081 TSF:MSG:SEND,45-45-0-0,s=5,c=0,t=33,pt=0,l=14,sg=0,ft=0,st=OK:Motion RX RSSI 4294 TSF:MSG:READ,0-0-45,s=5,c=0,t=33,pt=0,l=14,sg=0:Motion RX RSSI 4295 TSF:MSG:ACK 4338 TSF:MSG:SEND,45-45-0-0,s=7,c=0,t=36,pt=0,l=9,sg=0,ft=0,st=OK:UpdateTxt 4338 MCO:REG:REQ 4346 TSF:MSG:SEND,45-45-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=0,st=OK:2 4555 TSF:MSG:READ,0-0-45,s=255,c=3,t=27,pt=1,l=1,sg=0:1 4555 MCO:PIM:NODE REG=1 4555 MCO:BGN:STP 4555 MCO:BGN:INIT OK,TSP=1 4577 TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=OK:1 14583 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:0 24589 TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=OK:2 34595 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:0 44601 TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=OK:3 54607 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:0 64613 TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=OK:4 74619 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:0 84625 TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=OK:5 94631 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:0 106058 !TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=NACK:6 115278 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 115278 TSF:MSG:BC 115482 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 115482 TSF:MSG:BC 115685 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 115686 TSF:MSG:BC 115889 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 115889 TSF:MSG:BC 116673 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=1,st=OK:0 118528 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 118528 TSF:MSG:BC 118731 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 118731 TSF:MSG:BC 118934 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 118934 TSF:MSG:BC 119138 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 119139 TSF:MSG:BC 119342 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 119342 TSF:MSG:BC 119545 TSF:MSG:READ,7-7-255,s=255,c=3,t=7,pt=0,l=0,sg=0: 119545 TSF:MSG:BC 126679 TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=OK:7 136690 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:0 147104 TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=OK:8 157111 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:0 167117 TSF:MSG:SEND,45-45-0-0,s=7,c=1,t=47,pt=4,l=4,sg=0,ft=0,st=OK:9 177123 TSF:MSG:SEND,45-45-0-0,s=5,c=1,t=37,pt=2,l=2,sg=0,ft=0,st=OK:0 Has anyone had to reduce the Processor speed to make Teensy 3.2 Work previously? Any thoughts gratefully received.
• 

  Arduino nano 33 BLE sense
  • Bartosz Nowak  

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  @Bartosz-Nowak there is a long thread on this forum on the nrf52840. You could have a look there how to get things working
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  Low Power Solutions - minibrick and megabrick
  • cloolalang  

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  Favorite hand solderable radio chip?
  • NeverDie  

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  @monte said in Favorite hand solderable radio chip?: @NeverDie so is it directly compatible with nordic's protocol? Can it be used as drop-in replacement for nrf24? From MyConfig.h (obviously the assumed vendor is wrong ) There are some settings also to fix the ACK that is reversed compared to NRF24. /** @defgroup RF24SettingGrpPub RF24 @ingroup TransportSettingGrpPub @brief These options are specific to the RF24 family of wireless transport modules. The following chips are supported by this driver: | Vendor | Chip |--------------------------|---------- | Nordic Semiconductor | nRF24L01 | | nRF24L01+ | Beken Corporation | BK2401 | | BK2421 | | BK2491 | Hope Microelectronics | RFM70 | | RFM73 | Panchip Microelectronics | XN297 | Silicon Labs(?) | SI24R1 @{
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  is there a list of supported MCU platforms?
  • Nigel31  

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  Thank you all, the last offering is ideal. As it happens, it also covers the device I wish to use, for physical size and program storage capacity. Teensy' 3.2 Many thanks, look as I might I couldn't find it.
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  Faulty Easy PCB boards modified
  • mickecarlsson  

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  Help to identify Arduino pro mini clone components
  • barrydou  

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  Thank you so much. I did not found any schematic for those boards. And the diode and polyfuse are not on the sparkfun design. The diode let me crazy when trying to verify and trace the signal with multimeter. I take a long time before understanding why my multimeter some times say connected, sometime say not connected. And this night, I tell myself : it's a diode Thank you again !
• 

  How to measure remote voltage from anamometer
  • ricvice  

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  @ricvice You have reached the 'interesting' point now. You have the hardware, you sort of know what you want, but need to learn how to do it. We have all been there! So start with a clear idea of the system. Where are the displays going to be etc. Then try to make it work. Start off with simple sketches that do things like measure analog voltage (see battery powered sketch) This will be useful for the wind speed. Then look at the 'build' section at the top of this page for temp sensor. Again, try it and see how it goes. Gradually things will become clearer and you will be able to try and combine sketches into one that does it all for you. Small steps go a long way with this. You will need to make a gateway and choose a controller to use mysensors and display data, but you can easily see graphs etc so it could be worth it for you. A simple raspberry pi 3 and a pro mini would do for controller and gateway. If you get stuck or can't figure something out then post on here with your code and someone will help you. IF you don't want to go the mysensors route then the arduino forum would be a better place to ask as this is really only for mysensors related discussions.
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  [Solved]RFM69 Sleep Mode - high current when sleeping
  • barrydou  

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  Sorry for not giving news. So I've done lot of tests, triple check everything and still found "nothing" I test with deepSleep sketch from lowpowerlab, and still have high current. I finally receive new rfm69 and change it. And it's ok now !!! I have 25uA when sleeping !!! Don't know why, but with new one, it's ok Thank you again for your help and your ideas
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  mysensors node attiny841 and nrf24l01+
  • drummin89  

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  Hello, You can use this solution. I use this with attiny84 and attiny84A, for temperature sensor and opening sensor. http://domotique-diy.overblog.com/
• 

  ESP8266gateway with sensor
  • Meister_Petz  

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  Here is my code for doing something equivalent. You seem to have the pinMode line missing in setup() // Initialize motion message MyMessage msg(CHILD_ID, V_TRIPPED); void setup() { pinMode(MOTION_SENSOR_PIN, INPUT_PULLUP); // sets the motion sensor digital pin as input } void presentation() { // Present locally attached sensors here // Send the sketch version information to the gateway and Controller sendSketchInfo("Motion Sensor", "1.1"); // Register all sensors to gw (they will be created as child devices) present(CHILD_ID, S_MOTION); } boolean pinstate = false; void loop() { boolean newstate = (digitalRead(MOTION_SENSOR_PIN) == HIGH); if (newstate != pinstate) { if (newstate == true) { send(msg.set("1")); Serial.println("Motion Started"); pinstate = newstate; } else { send(msg.set("0")); Serial.println("Motion Stopped"); pinstate = newstate; } } }
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  Vertorix - Easily Create your Own Mesh Network with Sensors and Controllers
  • Vertorix  

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  @Vertorix said in Vertorix - Easily Create your Own Mesh Network with Sensors and Controllers: Hi I have created a new IOT project which allows the user to easily create a mesh network of sensors and control End devices. All programming of devices is done in the open source Arduino IDE, and there are already libraries and examples available. It's really easy to make your own network because all the mesh network side is automated. There is no stuffing around with complex wireless libraries, you just take your sensor readings and send them. You can use Node-red to create Dashboards and forward messages to MQTT etc. See Documentation here: link text The VT1100 in sleep mode consumes 7uA, so can run on battery for years. I'm trying to gauge interest in the project. If there is enough interest I will sell the devices cheaply. Thanks! thanks my issue has been fixed.
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  Some Nordic Dev Kits for offer.
  • Jokgi  

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  Clearance, creepage and other safety aspects in "MySensors" PCBs.
  pcb acdc ac power creepage clearance • • sundberg84  

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  @JohanH - thanks for your reply! I also hope and think people who build commercial products have knowledge of this But as a hobbyist, there are two ways to go - either you dont have to care or go bare minimum, if something happens its your own fault, or you can try to make is as safe as possible. My idea was never to make this thread a information source for a commercial product. I wanted to try to make my own products as safe as possible since I have children around. With that in mind, i want to be on the safe side of things so some things i use from here might be exaggerated. But my PCB (HLK-PM01 breakout) is working great, and I feel safe. I have had it outdoors (under roof covered in IP5* box, -20 to +30 aprox) and its been working for me for a couple of years now. Better than I had before, when i just stripped an old fake samsung charger. /Andreas
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  How to learn how computers and hardware works from a low level?
  • robert022  

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  I know it's a bit late reply xd. You could watch Ben Eater on YouTube. He has build a breadboard computer and explains how it works. He explains it great.
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  [Solved] How to check RFM69 is a HW model ?
  • carlierd  

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  Hi, By the PCB silk I was wrongly thinking that the module could be on of "RFM69" or "RFM69H" or "RFM69W" and "RFM69HW". Now if I understood correctly the diagram, the module can only be either the "RFM69W" (low power 13dBm) or the "RFM69HW" (high power 20dBm). Since this module has the "H" marked it should be "RFM69HW" and that is confirmed by the other side of it, because it has the two additional black ICs. Thanks!
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  selling mysensors sensebender gateway
  • rafael156  

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  [Solved] Easy PCB - current when sleeping
  • barrydou  

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  Thank you for your answer I'm trying to compare with only pro mini and rfm69 on a test plate, and 2 AA batteries. I have strange result, and i'm doubting about my multimeter. I'll continue testing and will tell you
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  What's the best PIR sensor?
  • NeverDie  

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  @lood29 Interesting. Looks like I can cut the threshold way down. I'll give that a try.
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  [SOLVED] Troubleshooting MQTT Gateway with Amplified NRF24L01+PA+LNA Long Range Antenna
  • fifo  

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  @fifo Well done! - probably the new module needed a little extra power and the power brick was already failing so this pushed it over the edge. Failing psu can be difficult to diagnose until they fail completely, especially if encapsulated. Power supply and cabling are usual suspects in this type of work. Well done and good luck with the rest of the project!
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  why no one uses latching relays ?
  • rozpruwacz  

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  In my use of bistable latching relays, where the state of the relay position is information that must be tracked, I have found it to be easiest to use an optocoupler (H11AA1 or PC817C) to feedback the state of the relay position, which is polled at bootstrap. If you have multiple states to read at boot, you can use something like the TCA9548A multiplexer to accomplish the state read and to set your volatile state variables appropriately, and save on your μC pin count.
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  This topic is deleted!
  • metceyn  

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  ESP32 as a sensor controller
  • RWoerz  

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  I have been doing exactly this recently. Though my CO2 sensor was 3.3V. But a solution could be powering the sensor with the VIN 5v pin and using a level shifter for communication. That's what I did with the 5V screen I used (though I didn't need a level shifter). I also added a lithium battery with a charging and safety circuit hooked up to a boost converter making it 5V and connected that with VIN and GND.
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  Combining 'Build' examples in to one Arduino
  • adds666  

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  @mfalkvidd many thanks for coming back. I think I'll keep more complex things seperate, however will explore multiple binary sensors and relays on the same node. Thanks
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  This topic is deleted!
  • EileenWen  

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  RF 433 Switch Failing
  • Thales Maia  

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  Extend footprint pads beyond nRF5 module; bad practice?
  • ncollins  

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  @skywatch that's good to know, thank you
• 

  pinout for waveshare 1.54 inch e-paper on fanstel BT832X
  • Jokostyl3  

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  https://www.tindie.com/products/electronutlabs/papyr-nordic-nrf52840-epaper-display/
• 

  Get STM32 blue pill to run
  • karlheinz2000  

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  Yes, no real EERPOM, but emulation in flash. EEPROM failure was the first finding when checking for this error message. Maybe somthing else... Now complete sketch is ported from AVR ProMini to STM32 and is runnig fine
• 

  Raspberry Pi NRF24L01+ with external Antenna and flatcable
  • rhannink  

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  Network with nRF24l01 modules
  • DECOMEDICAL  

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  @DECOMEDICAL said in Network with nRF24l01 modules: hello thanks for the reply ... x <= 10 What do you suggest me? I suggest that you start reading and learning on this site and then begin building. We don't know the ranges between nodes and gateway nor what sort of data you want to send, so learning what mysensors is and what it can do for you is the only option.
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  Best radio type for 5 floor communication
  • andrezibaia  

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  @andrezibaia LoRa has by far the biggest link budget, so if it can't manage it, probably nothing else can either, assuming similar transmit power. Also, you may find that your best signal path isn't straight through 5 floors of reinforced concrete but rather bouncing the signal off an adjacent building or the like.
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  PCB design with nRF24L01 and Arduino Pro Mini
  • RaPo  

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  I guess it took a lot of time to create it.
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  Sensebendermicro.ino verify errors
  • PRGelBueno  

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  @BearWithBeard had the same issues when I tried to recompile existing sketch and dug out the above libraries. My problem is that I then get a compile error "'atsha204Class' does not name a type; did you mean 'atsha204_read'?" at this line "atsha204Class sha204(sha204Pin);" Was just going to update working sketch to new mysensors library - but I guess not.
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  Which radio / wireless module to choose? Please recommend
  • tssk  

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  I finished gateway for my attic - What did you build today (Pictures) ?: As this will be under roof but without any isolation I try to put small silica gel bag (I collect them from other electronics packaging) inside and will see. I think it should be suitable. I am thinking of adding temperature and humidity sensor... that could also help me show how much humidity is around the year actually. I might use the resin / epoxy stuff for some watering projects
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  Air Quality sensor CJMCU-8118
  • dzjr  

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  Unless you make progress on this yourself you need to do the following to get more help. Post links to the items you are trying to use. Post links to the libraries you are using to achieve this. Post your code. Without the above it's all a shot in the dark.
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  Generic pressure sensors -SOLVED
  • zboblamont  

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  As a postscript to my own question should someone be looking at similar later, in practice the sensors were found to work perfectly well at 3v3. Described as 5v working, 0.5-4.5v signal range, the effect is pro-rata at 3v3 in terms of voltage but the ADC output is identical for VCC scaling - viz, ZERO pressure is 10% of 1024 the range is 80%
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  sx1278
  • MikeR  

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  There is already a LoRa library available for both Arduino Board and STM32 Bluepill Board. Using the simple library, the LoRa Module SX1278 is easily transmitting and receiving data packets.
• 

  cc1310/ 802.15.4 stack uart-ready radio: E70-433NW14S
  • cloolalang  

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  @scalz Hi yes, thanks for your response.
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  Has anyone worked with e32-433t30d or any products related to EByte Company
  • alkabir  

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  Hello, can you describe how you connected this module to mysensors?
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  ATMEGA328P standalone soil moisture sensor
  nrf24l01+ atmega328p soil moisture • • Ron  

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  @mfalkvidd the one that stops at 2.7v I once broke my head over it, then it saw I was looking at the automotive datasheet...
• 

  Everything nRF52840
  • NeverDie  

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  @NeverDie i can speak for arduino side im not sure how it works for CircuitPython. virtual hard drive part is only true if there was a bootloader prior to update. im not sure how nordic ships their dongles but i think they dont install adafruit bootloader inside of them so you need a fresh bootloader install and it is easy but you need jlink for that. after connecting your jlink to nrf52 open the arduino from menu find jlink for adafruit nrf52 and then just simply click install bootloader and voila it works with arduino. but then again that usb dongle wont work seamlessly with adafruit bootloader because im sure adafruit has different pin maps you just need to check their pins from variants file and match them on paper to the dongle so when you write your code you know which ones to use, unless theres a seperate variants file specifically made for this dongle.
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  HLK-PMxx protection: choosing the right MOV / fuse value
  • Encrypt  

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  @skywatch do Fluke meters work unattended in enclosed cabinets or walls, using varistors for power supply 24/7? As I've said I prefer using a better power supplies with built-in over-voltage protection. As for how it is achieved without a varistor you can find plenty information by yourself using google.
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  Delivery from PCBWay?
  • P72endragon  

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  I haven't ordered from them post covid-19 , but they used to be very reliable.
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  Using NRF24L01 with Arduino MKRZero
  nrf24 arduino mrkzero • • thedutch  

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  Nice work @thedutch, thanks for reporting back. In case you need anything similar, https://www.mysensors.org/apidocs/group__RF24SettingGrpPub.html lists the co figuration options for the nrf24 radio.
• 

  CubeCell reloaded: the SX126x hal drivers, please test
  • eiten  

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  @eiten Yep, already saw this one. Based on the heltec implementation, the sx-registers are mapped to specific memory regions of the mcu. Would be interesting to have here a complete ASR-specific documentation...
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  CubeCell HAL anyone?
  • eiten  

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  @leroyl, @nagelc: Please check out this thread to get you started. @nagelc oh, true, I got some E78 somewhere around... I gotta search them
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  MH-Z14A CO2 senso
  • viti  

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  This sensor is used here also https://github.com/rikki78/AirQuality
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  Heltec Cubecell support added. Please test!
  • eiten  

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  @mfalkvidd Well, there are http://www.ebyte.com/en/product-view-news.aspx?id=550
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  Powerline Communications
  • cloolalang  

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  @cloolalang If you can possibly avoid it, then power line is not the way to go. It turns your whole house wiring into a giant antenna and then some. Your neighbours can also be affected by this as there are currently no requirements for electrical (power) distribution systems to have chokes or filters of any kind.
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  nrf52840 usb dongle setup issues
  • SethFlannigan  

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  https://forum.mysensors.org/topic/9717/everything-nrf52840?_=1596113022839
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  House renovation, how to a good electrical system oriented to MySensors?
  • bruno  

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  @alowhum There will be a wealth of information out there on the net and probably also at your local library. look for resources about remote cabin power systems and also even the larger 5th wheeler type caravan systems will be helpful reading. You will also need to check your local building codes to see if there are any rules to be adhered to. When we built our house (about 15 years ago, long before i discovered MySensors we ran a low voltage backbone cable throughout the house. From this backbone we ran smaller cable drops to every room in the house. Many of these are still not in use but as others have said the cost of running wires is relatively cheap when you are building. Of course we still have mains power as well and use the low voltage system to compliment this. In those initial years the 12v system was used primarily for lighting systems such as night lights etc. As time progressed we installed 12v outlets in the bedrooms and these now are used to power bed/reading lamps. The small 12v downlights have also proved to be very easy to convert over as well. These were initially halogen bulbs but now there is a good range 12v LED replacements for just about any type of socket. Once I discovered MySensors and home automation then the 12v system became even more useful now powering several nodes and even the gateway. Right from the start we ran our system from a battery with solar charging and in 15 years it has never let us down. Voltage drop will always be a thing to watch, but with LED's low power draw and as you have surmised the ability of arduinos to run well below 12v it will usually be of little practical concern. Unless of course you are thinking of running more than lights and nodes.
• 

  mysensors 8266 mqtt gate
  • Олег Веремеенко  

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  Solar Energy Harvesting for wireless motes
  • NeverDie  

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  I made pcb for it it's on the roof of my flat, will dig trough my archives to see if i have kicad project for it.
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  Looking for a 12-24v DC to 5vDC converter
  • drock1985  

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  @monte said in Looking for a 12-24v DC to 5vDC converter: don't expect 3A from those exact small modules No, I don't need it. Only a little bit (far less than 1A) for the uC + radio. In this case I am just looking to power the uC off the same power supply as LEDs which have already reduced the mains down to 24VDC. I just thought it would be silly to have yet another power supply for the uC (coming from mains I mean), in addition to the one that's already there for the LEDs. So I plan to "piggy back" off that one, getting the 24VDC down finally to the 5VDC or whatever is needed for the uC + radio. But it is very nice to have such a wide range of inputs (and adjustable output!) available, for as yet unknown future projects / needs. Especially when finding nice and inexpensive module like this, and order some 10s of them from China and just keep them on hand!
• 

  Ebyte Lora UART radios - 433 MHz, Can only use Channels 433.00 and 434.00!
  • cloolalang  

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• 

  Easy PCB Question
  • grumpazoid  

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  @grumpazoid said in Easy PCB Question: I've switched to open source solutions wherever able. Good for you! Personally I prefer the term Free/Libre Software to "Open Source." They are very similar ideas, but not exactly the same. Cheers!
• 

  Sonoff Bridge 433mHz+ Digoo sensor witch firmware
  • DenisJ  

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  Great think this OpenMQTTGateway ) I'll post there. Thanks a lot Denis
• 

  MH-Z19 CO2 sensor
  • alowhum  

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  @Joseph-Gill said in MH-Z19 CO2 sensor: "simplicity" Welcome to the forums, Joseph. I am glad to see you put "simplicity" in quotes. Personally, I think that the level of difficulty that is portrayed towards new people (i.e., "it's easy!") is a little misleading. It is easy if you have "The Knack" but perhaps not so for everyone. @Joseph-Gill said in MH-Z19 CO2 sensor: How hard would it be I think this depends mostly on an honest evaluation of your own skills. You will need to have at least basic understanding of the technologies involved: radio propagation, electronics, coding, etc... Now, all of this can be learned of course, especially if you have interest, and time... So another part of it is also your expectations. If you need something "right now" then you might be happier to go buy something "off the shelf." OTOH, if you enjoy tinkering, learning, and want to eventually be able to build all different sort of devices exactly to your specifications and needs, then MySensors might be the right thing for you. IMO, I think the best approach is to take this as a hobby, slowly acquiring parts (the least expensive ones take a long time to come from China!) as well as knowledge, and eventually increasing your capabilities over a long period of time. And you will learn (IMO) very valuable skills in the process...
• 

  Just found a pair of "old" NRF51822-04 ... any good?
  • ghiglie  

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  @monte said in Just found a pair of "old" NRF51822-04 ... any good?: Though the power bug @Nca78 mentioned is easily bypassed with proper software settings. Just don't rely on built in sleep function, because in case of nfr51822 it doesn't disable all hardware and drains power. Sorry @monte, I'm totally n00b . Any link about this? @monte said in Just found a pair of "old" NRF51822-04 ... any good?: Though the power bug @Nca78 mentioned is easily bypassed with proper software settings. Just don't rely on built in sleep function, because in case of nfr51822 it doesn't disable all hardware and drains power. Oh, I know! But I lack time to tinker that much. I've just started on learning on Black Magic Probe and STLink differences and use cases... Maybe I just started the hard way, with a DK it would be, at least, less "pioneeristic".
• 

  Is my Wiring OK? - WS2811 LED Strips
  • wentalong  

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  Well there is no more sense in any of us wasting any of our valuable resources (time, thought) if it will not affect the design anyway, since you have already ordered the parts. Ignorance is fine, inconsideration for other people's time and effort is not (at least with me). I realize you are in a hurry to build something, we all are, but some times when you hurry you cost yourself time. Or other opportunities like feedback and chance to modify the design. All of which are irrelevant now (at least insofar as this particular project)... We still expect pictures of the completed project.
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  mysensor gateway with ENC28J60 Ethernet doubts!
  • pw44  

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  How are you troubleshooting? Monitoring serial? Network?
• 

  Reporting solar export power.
  arduino • • terryrow  

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  I would think that the "heavy lifting" of regulating the actual output power of the charger would be a function of the charge controller itself? Maybe you could tie into / control that somehow with your own microcontroller as brain / interface? Maybe they expose some API, serial, or other method of interfacing with their hardware? What are/were you using for charge controller? Also, what is "CT" in this context? I have read a bit here and there about solar (and related moving around and controlling of power, eg. batteries, charge controllers, etc...), as it is something I plan on doing "eventually" although I have no direct experience as of yet. So I will be following this thread with interest.
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  Ethernet Gateway - how reliable is it? which problems and how to avoid?
  • pw44  

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  I think you should stop spamming the same topic in a bunch of different threads. In fact, I think mods should merge and/or delete all these secondary threads, and possibly even warn.