My Slim 2AA Battery Node
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ok guys, I finally set up my first sensor and it´s communicating well. I´ve attached two reed switch which work fine, only my temp snesor DHT11 doesn´t work. Are there any known issues with this sensor?
pls have a look at my setup and my code, thank you:
// Simple binary switch example // Connect button or door/window reed switch between // digitial I/O pin 3 (BUTTON1_PIN below) and GND. #include <MySensor.h> #include <SPI.h> // Define Node ID #define MY_NODE_ID 1 //Kontaktschalter #include <Bounce2.h> #define CHILD1_ID 1 // Kontaktschalter 1 #define CHILD2_ID 2 // Kontaktschalter 1 #define BUTTON1_PIN 5 // Kontaktschalter 1 #define BUTTON2_PIN 6 // Kontaktschalter 2 //Tempsensor #include <DHT.h> #define CHILD_ID_HUM 3 #define CHILD_ID_TEMP 4 #define HUMIDITY_SENSOR_DIGITAL_PIN 4 unsigned long SLEEP_TIME = 30000; // Sleep time between reads (in milliseconds) MySensor gw; //Kontaktschalter Bounce debouncer1 = Bounce(); Bounce debouncer2 = Bounce(); int oldValueReed1=-1; int oldValueReed2=-1; //tempsensor DHT dht; float lastTemp; float lastHum; boolean metric = true; //Messages // Kontaktschalter MyMessage msgReed1(CHILD1_ID,V_TRIPPED); // Kontaktschalter 1 MyMessage msgReed2(CHILD2_ID,V_TRIPPED); // Kontaktschalter 2 //TempMessage MyMessage msgHum(CHILD_ID_HUM, V_HUM); MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); void setup() { gw.begin(NULL, MY_NODE_ID, true); //Tempsensor dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); // Setup Kontaktschalter 1 pinMode(BUTTON1_PIN,INPUT); // Activate internal pull-up digitalWrite(BUTTON1_PIN,HIGH); // Setup Kontaktschalter 2 pinMode(BUTTON2_PIN,INPUT); // Activate internal pull-up digitalWrite(BUTTON2_PIN,HIGH); // After setting up the button, setup debouncer debouncer1.attach(BUTTON1_PIN); debouncer2.attach(BUTTON2_PIN); debouncer1.interval(5); debouncer2.interval(5); // 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. gw.present(CHILD1_ID, S_DOOR); gw.present(CHILD2_ID, S_DOOR); //Tempsensor gw.present(CHILD_ID_HUM, S_HUM); gw.present(CHILD_ID_TEMP, S_TEMP); metric = gw.getConfig().isMetric; } // Check if digital input has changed and send in new value void loop() { //Kontakstschalter 1 debouncer1.update(); // Get the update value int valueReed1 = debouncer1.read(); if (valueReed1 != oldValueReed1) { // Send in the new value gw.send(msgReed1.set(valueReed1==HIGH ? 1 : 0)); Serial.println("Button 1 geschaltet"); oldValueReed1 = valueReed1; } //Kontakstschalter 2 debouncer2.update(); // Get the update value int valueReed2 = debouncer2.read(); if (valueReed2 != oldValueReed2) { // Send in the new value gw.send(msgReed2.set(valueReed2==HIGH ? 1 : 0)); Serial.println("Button 2 geschaltet"); oldValueReed2 = valueReed2; } //Tempsensor delay(dht.getMinimumSamplingPeriod()); float temperature = dht.getTemperature(); if (isnan(temperature)) { Serial.println("Failed reading temperature from DHT"); } else if (temperature != lastTemp) { lastTemp = temperature; if (!metric) { temperature = dht.toFahrenheit(temperature); } gw.send(msgTemp.set(temperature, 1)); Serial.print("T: "); Serial.println(temperature); } float humidity = dht.getHumidity(); if (isnan(humidity)) { Serial.println("Failed reading humidity from DHT"); } else if (humidity != lastHum) { lastHum = humidity; gw.send(msgHum.set(humidity, 1)); Serial.print("H: "); Serial.println(humidity); } //gw.sleep(SLEEP_TIME); //sleep a bit } -
Oh man, one problem solved, next just comes up...
So what can I Do now? Just upload the 8MHz bootloader and just use 8MHz instead of 1MHz?
edit: Ok, tested it, it works with the 8MHz Bootloader!
please explain one more time if I could just use the 8MHz Bootloader, I still could not fully understand why I should use the 1 MHz Bootloader (maybe because of my bad english and also my lack of electronics knowledge). Thank you very much!!
edit2: I measured 0,02 Ampere consumption, isn´t that too much?
still learning...
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Oh man, one problem solved, next just comes up...
So what can I Do now? Just upload the 8MHz bootloader and just use 8MHz instead of 1MHz?
edit: Ok, tested it, it works with the 8MHz Bootloader!
please explain one more time if I could just use the 8MHz Bootloader, I still could not fully understand why I should use the 1 MHz Bootloader (maybe because of my bad english and also my lack of electronics knowledge). Thank you very much!!
edit2: I measured 0,02 Ampere consumption, isn´t that too much?
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OK thx for the hint, I guess I will just add a third AA battery, that should solve my problem...
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I really don't want to spam this thread...
But from my arduino Uno the nrf24l01 module is also powered by 5V!?!
Edit : ah ok, the arduino is going to regulate down to 3.3v... Then I cant use 3AAs :(
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I wasn't aware that the nrf24l01 is so sensitive to voltage higher than 1.9v. I would like to have a sensor design to which I can add different sensors, just for the purpose I need it right now. So most sensors need 3.3v or 5v and I have to decide if I use 3v cells, which are more expensive or use step up / step down regulators which will drain my batteries. I just want to keep the flexibility to add any sort of sensor to my board... What would you suppose to do, also I think I am not the only one who faces those problems. Of course I am a beginner and still have a lot to learn but I also just want to finish this project as I am working on it for a very long time now...
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I wasn't aware that the nrf24l01 is so sensitive to voltage higher than 1.9v. I would like to have a sensor design to which I can add different sensors, just for the purpose I need it right now. So most sensors need 3.3v or 5v and I have to decide if I use 3v cells, which are more expensive or use step up / step down regulators which will drain my batteries. I just want to keep the flexibility to add any sort of sensor to my board... What would you suppose to do, also I think I am not the only one who faces those problems. Of course I am a beginner and still have a lot to learn but I also just want to finish this project as I am working on it for a very long time now...
@siod said:
I wasn't aware that the nrf24l01 is so sensitive to voltage higher than 1.9v.
Typo? I suppose you mean 3.3V.
I would like to have a sensor design to which I can add different sensors...
Please reply why you don't like those two designs I linked to in my last post above.
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5V as a supply voltage had been the standard for many decades.
As integrated circuits have become more compact and more efficient, 3.3V and 1.8V as supply voltages have become standards as well. 3.3V for most components, 1.8V is more recent and only used in some very highly integrated circuits.
For sensornodes based on batteries, the 3.3V standard is very usefull and most sensors are available for this working voltage.
If you really need 5V for a particular sensor, then think about AC or USB powered nodes. 5V sensors are a bad choice for battery based nodes. The 5V sensors are mostly old designs, and very inefficient when looking at them from a powerconsumption point of view.
So you can want to combine 3.3V and 5V sensors, but our experience is NOT to combine and make a choice for low power (modern) 3.3V sensors when trying to build battery based sensor nodes.
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OK guys, thanks for the explanation. In this case I need to buy new temp sensors...
The 3.7v batteries are no option for me because they are too expensive in my eyes. I didn't want to buy new temp sensors as I already bought a couple of the DHT 11 sensors but it seems like there is no other chance now.
I just think the next time I encounter problems is, when I try to setup a new sensor node with attached pir motion sensor... I will read the data sheet of it first and look out for power consumption :)
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Is there any motion sensor that work on 3.3 V ? I tried powering the below one with 3.3 but it was acting crazy and keeps reporting motions.
http://store.fut-electronics.com/products/pir-motion-sensor-module-adjustable-range
It is written that V range is 3-5 but it worked well with 5v only.
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Is there any motion sensor that work on 3.3 V ? I tried powering the below one with 3.3 but it was acting crazy and keeps reporting motions.
http://store.fut-electronics.com/products/pir-motion-sensor-module-adjustable-range
It is written that V range is 3-5 but it worked well with 5v only.
@ahmedadelhosni Haven't you seen the motion example sensors in the first post of this thread?
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@ahmedadelhosni Haven't you seen the motion example sensors in the first post of this thread?
@m26872 yeah I know you have a topic but actually was concerned with door and window sensors that time and forgot to check it again when I needed it :)
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I can't program my slim node through ISP, is there a reason it isn't working.
I use USBASP with jumper 3 connected.
But it can't find the node.someone have a clue how to solve this.
it doesn't recognise the avr.
This is the error i get:
avrdude: error: programm enable: target doesn't answer. 1
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.avrdude done. Thank you.
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I can't program my slim node through ISP, is there a reason it isn't working.
I use USBASP with jumper 3 connected.
But it can't find the node.someone have a clue how to solve this.
it doesn't recognise the avr.
This is the error i get:
avrdude: error: programm enable: target doesn't answer. 1
avrdude: initialization failed, rc=-1
Double check connections and try again, or use -F to override
this check.avrdude done. Thank you.
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Below is my first sketch with this awsome 2aa battery powerd board.
i didn't measure the current. but i tryed to be as efficient with the power as possible.my avr is running on 8Mhz, this is becaus the DTH22 doesn't run on 1Mhz.
#include <SPI.h> #include <MySensor.h> #include <DHT.h> #include <Vcc.h> #define CHILD_ID_TEMP 1 // Child id for temperatur #define CHILD_ID_HUM 2 // Child id for humidity #define CHILD_ID_VOLT 3 // Child id for battery reading #define HUMIDITY_SENSOR_DIGITAL_PIN 3 // Where is my DHT22 data pin connected to int node_id=6; // What is my node id unsigned long SLEEP_TIME =30000UL; // Sleep time between reads (in milliseconds) int sleepcycle=1; // Counter to count the amout of time not sending data int humoffset=2; // only data is send if humidity is changed for this amout int tempoffset=0.5; // only data is if temperature is changed for this amout int gwsendtimout=20; // each 20*sleep_time (10 minutes) data will be send const float VccMin = 1.5; // Minimum expected Vcc level, in Volts. const float VccMax = 3.0; // Maximum expected Vcc level, in Volts. const float VccCorrection = 1.0/1.0; // Measured Vcc by multimeter divided by reported Vcc Vcc vcc(VccCorrection); MySensor gw; DHT dht; //Store last values float lastTemp = 0 ; float lastHum = 0 ; float batteryV=0; int oldBatteryPcnt = 0; boolean lastTripped = false ; boolean metric = true; boolean gwsend = true; // to determin if data has to be send MyMessage msgHum(CHILD_ID_HUM, V_HUM); MyMessage msgTemp(CHILD_ID_TEMP, V_TEMP); MyMessage msgVolt(CHILD_ID_VOLT, V_VOLTAGE); void setup() { gw.begin(NULL,node_id,false); dht.setup(HUMIDITY_SENSOR_DIGITAL_PIN); // Send the Sketch Version Information to the Gateway gw.sendSketchInfo("Humidity", "1.1",true); // Register all sensors to gw (they will be created as child devices) gw.present(CHILD_ID_HUM, S_HUM,"Humidity douche"); gw.present(CHILD_ID_TEMP, S_TEMP,"Temperatuur douche"); gw.present(CHILD_ID_VOLT, S_MULTIMETER,"Battery voltage"); metric = gw.getConfig().isMetric; } void loop() { // get the battery Voltage batteryV = vcc.Read_Volts(); int batteryPcnt = vcc.Read_Perc(VccMin, VccMax); if (oldBatteryPcnt != batteryPcnt) { // Power up radio after sleep gwsend=true; oldBatteryPcnt = batteryPcnt; } delay(dht.getMinimumSamplingPeriod()); float temp1 = dht.getTemperature(); float humidity = dht.getHumidity(); if (isnan(temp1)) { // Serial.println("Failed reading temperature from DHT"); } else if ((temp1 <= lastTemp-tempoffset)||(temp1 >= lastTemp+tempoffset)) { lastTemp = temp1; if (!metric) { temp1 = dht.toFahrenheit(temp1); } gwsend=true; } if (isnan(humidity)) { // Serial.println("Failed reading humidity from DHT"); } else if ((humidity <= lastHum-humoffset)||(humidity >= lastHum+humoffset)) { lastHum = humidity; gwsend=true; } if (sleepcycle>gwsendtimout){ gwsend=true; } if (gwsend){ gw.sendBatteryLevel(oldBatteryPcnt); gw.send(msgVolt.set(batteryV, 1)); gw.send(msgTemp.set(lastTemp, 1)); gw.send(msgHum.set(lastHum, 1)); gwsend=false; sleepcycle=1; } sleepcycle++; gw.sleep(SLEEP_TIME); }
