Easy/Newbie PCB for MySensors

[hiddenuser]

Awesome board!!!
How do I access A2, A3 and D8?

Thanks a lot

[sundberg84]

@hiddenuser - they are not accesses through the PCB:

You need to solder a wire on the Pro Mini and run somewhere, like the prototyping area.

[hiddenuser]

@sundberg84 Thanks a lot.... My ebay seller sent me a Atmega168 5v. I have noticed that you boards supports 5v version too. Would I be able to power it using raw (12v).

Thanks a lot .

[sundberg84]

@hiddenuser - as long as the voltage divider on the board supports 12v that will work. A warning on the cheap chinese stuff is that this voltage regulator is bad and might fry.

[achurak1]

@sundberg84 - thanks for your board, it seems to be almost exactly what I was looking for! What do you think would be the best way to adjust it if I need to boost the batteries not only to 3.3V, but also to 5V to run the pir sensor?

[sundberg84]

@achurak1 - do you mean running 5v on batteries? Sorry - thats out of my knowledge.
I guess there are 5v boosters but my guess is also that this will drain the batteries pretty fast.
I have made test with 9v batteries and voltage regulaters and this has worked for some time but never gives the lifetime as 3.3v on 2xAA.

[achurak1]

@sundberg84 - correct, the 5v booster looks exactly like the 3.3v booster. I have another sensor I've built manually and it works exactly like that, arduino/temp/hum/radio all work from 3.3v and pir works from 5v. I power it all with two rechargeable batteries (so ~2.6 max charged, not even 3) and it's been running good for several months already and still shows 2.45-2.50.

[gohan]

@achurak1 do you know you could modify the pir sensor to work directly from batteries by removing the regulator?

[achurak1]

@gohan - I tried to connect the 3.3v to one of the three pins where you'd usually put a jumper (H, L pads) as I've seen people discussing it on this forum and it just didn't work for me, the sensor did work, but very unstable, would fire up every time radio sends or receives something.

[gohan]

Because you need to add an extra AA battery to increase voltage to around 4,5v just for the pir sensor

[achurak1]

@gohan - not sure how exactly it answers my question? I thought you meant I could run the pir from 3.3v. I could plug everything to an outlet and don't worry about the batteries at all. The pir works perfectly from two batteries and the 5v booster, so why would I want to add more batteries and make the whole thing much bigger?

[gohan]

I was just saying that without regulators/boosters you can still make a working sensor and get a better battery life. If you don't mind battery life or you can make an outlet powered sensor, of course it makes not much sense.

[sundberg84]

Im doing a new revision here with RFM69 support.
I never used the RFM69 though - is there anything I should take in mind?

• Is it the same with IRQ as Nrf24l01+ - not used, but good to have ie. should i have a jumper so the user can connect IRQ ?
• The antenna, is it enough with a jumper/hole so the user can solder a antenna of their own? Or is the trace/trace-length also included as the antenna?

[gohan]

The problem with rfm69 is that they work on 3 different frequencies, so you have to choose which frequency you want to support. I'm not sure if the correct length for the 433mhz is good also for the 866mhz. Let's hope somebody more expert shows up

[sundberg84]

@gohan - You mean with the antenna? (But the footprint is the same?)
Well, if the trace isnt added to the lenght of the antenna and I add a through-hole the user can just add what kind of lenght they want?

[gohan]

The trace adds up to the antenna lengths for what I have seen so far, so I'd say to play safe and leave a hole where to solder the wire antenna or even better if it's near the edge of the pcb you could design a place to mount a sma connector for a real antenna. What do you think?

[sundberg84]

@gohan - the problem is then if you buy a antenna from ebay with the right length. Added to the PCB trace the length will not match. I have to make the antenna hole as close as possible to the module then.

[gohan]

by looking around at other PCBs with sma connectors, they are close to radio module, but still a few millimeters away so I'd say you should be ok

[sundberg84]

@gohan - notised that as well. I have asked scalz over PM about this, I saw he made alot of RFM projects.

[sundberg84]

Sneak-peak at upcoming RFM edition.
All input appreciated as usual.

• I couldnt fit a SMA connector at this point for external antenna because I dont want to remodel the PCB completley.
  I want it to be as close looking to the original as possible to make it easier for newbies.
• I went with the HW/W version. I talked to scalz and the CW is smaller and better for low power but HW/W is the one at MySensors website/tutorial/shop and preffered at 5v...

Thoughts?

[gohan]

I thought the SMA connector could fit on the side of the PCB... oh well....
Btw, is the CW really smaller? I thought it was only a different pinout

[sundberg84]

@gohan - Could be - never used them :S I just checked this image and they look smaller: https://www.google.se/search?q=RFM69H&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjdzPDD2OTTAhWqK5oKHW5RCboQ_AUICygC&biw=1920&bih=941#tbm=isch&q=RFM69H+pinout&imgrc=c_R-Nh2VtBGlRM:

Im giving it a second try with the SMA tonight... I will rotate it 180dgr and maybe I can fit it there...

[dbemowsk]

@shabba the purpose is to keep the raw power away from the 16 pin breakout header if it is not needed. If you connect the jumper, you will have raw power available on pin 1 of the header.

[dbemowsk]

I was working on a project last night and was using an old REV 8 board for it. After wiring it up I needed to check some things with the pins on the breakout header. When I looked at the site, which showed the REV 9 board, I noticed that the breakout header is quite different between the REV 8 and REV 9 boards. I figured that it was worth noting to people here to watch what diagram you are looking at compared to what REV of the board you are using.

[sundberg84]

@dbemowsk - thank you for pointing this out!
Rev 8 is MysX 1.X and one of the reasons I upgraded to Rev 9 is because MysX 2.X came out. The pins are a bit changed but much better in MysX 2.X. For more details can study the changes.txt as well in the project.

I will add this to Q&A for EasyPCB so other users dont miss it!
Thanks again!

[Markus.]

Hi All,
I have a lot of these PCBs in Rev.9 running as battery powered sensors. Also some with regulated power. They are running currentl with a NRF24L01. But i need to use on some sensors a RFM69 868 Radio. I have few breakout boards to use a RFM69 on a NRF24L01 connector. Is it possilbe just to replace the Radios on my EasyPBCs NRF to use RFM69 Radios? Think from power perspective should this be working. Well I know I have to Change also the Radio type in the Sketch. But is there anything more to do? Like cabling or specific Settings in the Sketch?

Many Thanks
Markus

[korttoma]

@Markus. Keep in mind that the RFM69 radio pins are not 5V tolerable so use them only with 3.3V Pro mini. And like you said change the radio type in sketch.

[Markus.]

@korttoma yes i use the pro mini 3,3V but can Ireplace the Radios simply with a modification of the Sketch ? Because hen I Flash following Sketch to the Easy pcb:

// Sample RFM69 receiver/gateway sketch, with ACK and optional encryption, and Automatic Transmission Control
// Passes through any wireless received messages to the serial port & responds to ACKs
// It also looks for an onboard FLASH chip, if present
// **********************************************************************************
// Copyright Felix Rusu 2016, http://www.LowPowerLab.com/contact
// **********************************************************************************
// License
// **********************************************************************************
// This program is free software; you can redistribute it 
// and/or modify it under the terms of the GNU General    
// Public License as published by the Free Software       
// Foundation; either version 3 of the License, or        
// (at your option) any later version.                    
//                                                        
// This program is distributed in the hope that it will   
// be useful, but WITHOUT ANY WARRANTY; without even the  
// implied warranty of MERCHANTABILITY or FITNESS FOR A   
// PARTICULAR PURPOSE. See the GNU General Public        
// License for more details.                              
//                                                        
// Licence can be viewed at                               
// http://www.gnu.org/licenses/gpl-3.0.txt
//
// Please maintain this license information along with authorship
// and copyright notices in any redistribution of this code
// **********************************************************************************
#include <RFM69.h>         //get it here: https://www.github.com/lowpowerlab/rfm69
#include <RFM69_ATC.h>     //get it here: https://www.github.com/lowpowerlab/rfm69
#include <SPIFlash.h>      //get it here: https://www.github.com/lowpowerlab/spiflash
#include <SPI.h>           //included with Arduino IDE install (www.arduino.cc)

//*********************************************************************************************
//************ IMPORTANT SETTINGS - YOU MUST CHANGE/CONFIGURE TO FIT YOUR HARDWARE *************
//*********************************************************************************************
#define NODEID        1    //unique for each node on same network
#define NETWORKID     100  //the same on all nodes that talk to each other
//Match frequency to the hardware version of the radio on your Moteino (uncomment one):
//#define FREQUENCY     RF69_433MHZ
#define FREQUENCY     RF69_868MHZ
//#define FREQUENCY     RF69_915MHZ
#define ENCRYPTKEY    "sampleEncryptKey" //exactly the same 16 characters/bytes on all nodes!
#define IS_RFM69HW_HCW  //uncomment only for RFM69HW/HCW! Leave out if you have RFM69W/CW!
//*********************************************************************************************
//Auto Transmission Control - dials down transmit power to save battery
//Usually you do not need to always transmit at max output power
//By reducing TX power even a little you save a significant amount of battery power
//This setting enables this gateway to work with remote nodes that have ATC enabled to
//dial their power down to only the required level
#define ENABLE_ATC    //comment out this line to disable AUTO TRANSMISSION CONTROL
//*********************************************************************************************
#define SERIAL_BAUD   115200

#ifdef __AVR_ATmega1284P__
  #define LED           15 // Moteino MEGAs have LEDs on D15
  #define FLASH_SS      23 // and FLASH SS on D23
#else
  #define LED           9 // Moteinos have LEDs on D9
  #define FLASH_SS      8 // and FLASH SS on D8
#endif

#ifdef ENABLE_ATC
  RFM69_ATC radio;
#else
  RFM69 radio;
#endif

SPIFlash flash(FLASH_SS, 0xEF30); //EF30 for 4mbit  Windbond chip (W25X40CL)
bool promiscuousMode = false; //set to 'true' to sniff all packets on the same network

void setup() {
  Serial.begin(SERIAL_BAUD);
  delay(10);
  radio.initialize(FREQUENCY,NODEID,NETWORKID);
#ifdef IS_RFM69HW_HCW
  radio.setHighPower(); //must include this only for RFM69HW/HCW!
#endif
  radio.encrypt(ENCRYPTKEY);
  radio.promiscuous(promiscuousMode);
  //radio.setFrequency(919000000); //set frequency to some custom frequency
  char buff[50];
  sprintf(buff, "\nListening at %d Mhz...", FREQUENCY==RF69_433MHZ ? 433 : FREQUENCY==RF69_868MHZ ? 868 : 915);
  Serial.println(buff);
  if (flash.initialize())
  {
    Serial.print("SPI Flash Init OK. Unique MAC = [");
    flash.readUniqueId();
    for (byte i=0;i<8;i++)
    {
      Serial.print(flash.UNIQUEID[i], HEX);
      if (i!=8) Serial.print(':');
    }
    Serial.println(']');
    
    //alternative way to read it:
    //byte* MAC = flash.readUniqueId();
    //for (byte i=0;i<8;i++)
    //{
    //  Serial.print(MAC[i], HEX);
    //  Serial.print(' ');
    //}
  }
  else
    Serial.println("SPI Flash MEM not found (is chip soldered?)...");
    
#ifdef ENABLE_ATC
  Serial.println("RFM69_ATC Enabled (Auto Transmission Control)");
#endif
}

byte ackCount=0;
uint32_t packetCount = 0;
void loop() {
  //process any serial input
  if (Serial.available() > 0)
  {
    char input = Serial.read();
    if (input == 'r') //d=dump all register values
      radio.readAllRegs();
    if (input == 'E') //E=enable encryption
      radio.encrypt(ENCRYPTKEY);
    if (input == 'e') //e=disable encryption
      radio.encrypt(null);
    if (input == 'p')
    {
      promiscuousMode = !promiscuousMode;
      radio.promiscuous(promiscuousMode);
      Serial.print("Promiscuous mode ");Serial.println(promiscuousMode ? "on" : "off");
    }
    
    if (input == 'd') //d=dump flash area
    {
      Serial.println("Flash content:");
      int counter = 0;

      while(counter<=256){
        Serial.print(flash.readByte(counter++), HEX);
        Serial.print('.');
      }
      while(flash.busy());
      Serial.println();
    }
    if (input == 'D')
    {
      Serial.print("Deleting Flash chip ... ");
      flash.chipErase();
      while(flash.busy());
      Serial.println("DONE");
    }
    if (input == 'i')
    {
      Serial.print("DeviceID: ");
      word jedecid = flash.readDeviceId();
      Serial.println(jedecid, HEX);
    }
    if (input == 't')
    {
      byte temperature =  radio.readTemperature(-1); // -1 = user cal factor, adjust for correct ambient
      byte fTemp = 1.8 * temperature + 32; // 9/5=1.8
      Serial.print( "Radio Temp is ");
      Serial.print(temperature);
      Serial.print("C, ");
      Serial.print(fTemp); //converting to F loses some resolution, obvious when C is on edge between 2 values (ie 26C=78F, 27C=80F)
      Serial.println('F');
    }
  }

  if (radio.receiveDone())
  {
    Serial.print("#[");
    Serial.print(++packetCount);
    Serial.print(']');
    Serial.print('[');Serial.print(radio.SENDERID, DEC);Serial.print("] ");
    if (promiscuousMode)
    {
      Serial.print("to [");Serial.print(radio.TARGETID, DEC);Serial.print("] ");
    }
    for (byte i = 0; i < radio.DATALEN; i++)
      Serial.print((char)radio.DATA[i]);
    Serial.print("   [RX_RSSI:");Serial.print(radio.RSSI);Serial.print("]");
    
    if (radio.ACKRequested())
    {
      byte theNodeID = radio.SENDERID;
      radio.sendACK();
      Serial.print(" - ACK sent.");

      // When a node requests an ACK, respond to the ACK
      // and also send a packet requesting an ACK (every 3rd one only)
      // This way both TX/RX NODE functions are tested on 1 end at the GATEWAY
      if (ackCount++%3==0)
      {
        Serial.print(" Pinging node ");
        Serial.print(theNodeID);
        Serial.print(" - ACK...");
        delay(3); //need this when sending right after reception .. ?
        if (radio.sendWithRetry(theNodeID, "ACK TEST", 8, 0))  // 0 = only 1 attempt, no retries
          Serial.print("ok!");
        else Serial.print("nothing");
      }
    }
    Serial.println();
    Blink(LED,3);
  }
}

void Blink(byte PIN, int DELAY_MS)
{
  pinMode(PIN, OUTPUT);
  digitalWrite(PIN,HIGH);
  delay(DELAY_MS);
  digitalWrite(PIN,LOW);
}

I get following result:

Listening at 868 Mhz...
SPI Flash MEM not found (is chip soldered?)...
RFM69_ATC Enabled (Auto Transmission Control)

[gohan]

@Markus.

I am using these and they work https://www.mysensors.org/hardware/nrf2rfm69

[Markus.]

@gohan its eactly the adaptor board which i try to use at the Moment.
But I am not sure If the test Sketch can work. Because the pin Definition could be different to get it working on the Easy PCB with RFM69 ?!

[gohan]

No, I only changed the define from nrf24 to rfm69 and that was it. The capacitor I left the one on the EASYPCB near the nrf24 connector (a 10uF ceramic)

[Markus.]

@gohan Sounds good well, I have a 10uF electrolytic there. Hope it makes not the big difference. On the boards with NRF works that fine so far.

[gohan]

I used the ceramic becuse I had a bunch of those

[sincze]

@sundberg84: Received the V9 boards and started to work with them. Converting my nodes into smaller ones

I want to use it with my 5v arduino. So need voltage regulator for the radio. I guess you are using LE33 if I read the thread correctly. I have LM1117 which seems to be a hassle to fix on the board with the 'rough bulky' legs. Suggestions or just buy LE33

[gohan]

if you have MCP1700 you can still fit those

[dbemowsk]

@sincze When I first got my rev8 boards a long time ago I had the same issue. I did manage to bend the leads and solder some extensions on one to get it to work, but in the end it was just too much of a pain in the arse. I ended up buying L78L33ACZ regulators which work just fine, but the board was designed using the LE33. The LE33 is an LDO regulator where the L78L33 is not. The quiscent current of the L78L33 regulator, which is something I forgot to look at when I bought them, is 6mA where the LE33 maxes out at 3mA, which is much better when building battery operated nodes.

[sundberg84]

As mentioned above, it works but you need to watch for the right pins... you might have to be careful bending those pins but I think its managable... My suggestion though is to look for volt. regulators with the same pinout.

[sincze]

@dbemowsk said in Easy/Newbie PCB for MySensors:

LDO regulator

A well that is a clear answer. So I just ordered a few LE33. The project has to wait.
It still will be a tough one getting everyting attached to the pins. ->. 2x Door Sensor / 3x Dallas DS18B20 / 3x Relais / 2x Control LEDS TX/RX. A well part of the game. Already figured out I have to use the A0x pins as digital ones. As i don't plan to use IRQ I'm really hopeful this nicely designed PCB will offer me A0,A1A4,A5 D2,D3,D5,D6. So should fit

[dbemowsk]

@sincze With that much going on, you may want to connect a set of header pins to the outputs next to the nRF24 radio and run that to an external proto-board for connecting all of your devices. You won't make it on the small proto section of the newbie board for everything you want to add.

[sundberg84]

@dbemowsk @sincze - its a good idea with a proto board or you can build something and add as an shield on the MysX connector... I would also suggest you run a seperate power regulator for the sensors... atleast do some calculactions before adding them in because LE33 can handle maximum of 0.2A i think.

[sincze]

@sundberg84 Ok tnx for the heads up. Currently I have everything in DEMO up and running on a NANO on my desk (using the exact same pins as I would on your PCB.
I was thinking of the following. Power the PCB with 5v and use a 5v arduino mini, use the LE33 to power the Antenna with 3,3v. Hopefully this will enable the pins Mys pins A0 ...Dx with 5v.(Have to look at the schematic to be sure). Keeping your advise in mind to add some extra juice I have to power the RELAIS & Temp sensor separately with 5v and keep the grounds of everything together with the PCB. I think it should work. But maybe I am missing something.

[sundberg84]

@sincze all you can do is test and learn !!

[dbemowsk]

@sundberg84 Couldn't think of the name of the MysX connector when I did that post, but that's what I was talking about putting the header on to connect to the proto-board. Mainly to act as a proto-shield. I would agree to run the sensors from a separate regulator. If he plugs it into the MysX connector he should have access to RAW power if he jumpers the pads next to the MysX connector, and then he may be able to make use of at least one of his LM1117 regulators on his shield, provided that he runs the sensors from 3.3V. I am assuming that his LM1117's are 3.3V regulators and not the 5V versions.

[sincze]

@dbemowsk Got in stock 2 types of LM1117 the 3,3v and 5v. In any case the relais need 5v, the temp sensor as well. So If I read RAW in your answer that triggers me to watch out. I'll start soldering some pins and measure the voltage. as @sundberg84 said.. "all you can do is test and learn !! hehehe. Part of the Mysensors fun. And ofcourse this forum provides me with experienced feedback.

[sincze]

So this is where the project is at. Using regulated 5V.
Still missing the 0,1u capacitor, but it is on its way,

The voltage divider is working fine 5v -> 3,3v.
Maybe I am missing some(connection)thing as I don't have 3,3v at the Antenna 3,3/GND connector. Did I miss something as I am not a PCB expert, sorry.

[sundberg84]

@sincze

I don't have 3,3v at the Antenna 3,3/GND connector

If you measure these points, what do you have?

• plus (left pin) on blue screw terminal (should be 5v)
• reg jumper (should be 5v)
• Vin voltage reg (should be 5v)
• Vout Voltage reg (should be 3.3v)

You should be able to follow the trace from Vout to VCC(radio) with your eye.
You can do a continuity test from Vout to VCC (radio) and GND(radio) to GND(screw terminal) to comfirm connectiom.

What kind of voltage regulator do you have? Did you check the pinout matched vin/vout/gnd ?

Still missing the 0,1u capacitor, but it is on its way,

No rush, this supports the voltage reg but unless you do some heavy things you will do without.

[sincze]

@sundberg84 I did measure the following:

plus (left pin) on blue screw terminal (should be 5v), is 4,96 V
Vin voltage reg (should be 5v), is 4,96
Vout Voltage reg (should be 3.3v), is 3,3

[sundberg84]

@sincze but still 0v at radio VCC?

[sincze]

@sundberg84 unfortunately yes. However.

You can do a continuity test from Vout to VCC (radio) , (We have no beep for continuity)
and
GND(radio) to GND(screw terminal) to comfirm connectiom. (We have a beep for contiuity)

[sundberg84]

@sincze if this is so you have a broken pcb trace (first time I ever heard of) do you need to replace the trace with a wire.

[sundberg84]

@sincze or a bad solder joint...

[sincze]

@sundberg84 as I am not a soldering king... we will check the work and report back...... applied a bit more solder to the vout and we have beep now let's continue the work.
Wow, 3,3 and 3,29v on the antenna. tnx.

[sundberg84]

@sincze no worries. Good luck.

[SolderNewbie]

Hi,
I‘m new to MySensors and the Newbie PCB. At the weekend I build my first sensor but I had one Problem. I want to use battery powered sensors so I’m using the 3.3V battery booster. I’m have connected/soltered everything and the Arduino was runing fine. But the NRF24-Module wasn’t working. I cheked it and there was no voltage at the Vcc pin of the NRF24. Then I found out, the NRF24 is only powered if the battery jumper is closed. If the battery jumper is opened there is not voltage at the NRF24 module and also not at the 3.3 pin of the MysX pin out. Ist this correct?I thought the NRF24 is powered by the battery booster by default. Or did I get it wrong?

[gohan]

@SolderNewbie of course you need to close that jumper since you are using batteries.

[sincze]

@sundberg84 tnx.
I looked at the FAQ and could not find an explaination how to use the pins TX/RX.

The following is now on my build list, but maybe if I can use TX/RX pins it will free something...

1. LED RX=A05
2. LED TX=D02
3. Relay_1=A00
4. Relay_2=A01
5. Relay_3=A04
6. Temp_D03 (total of 4, resistor currently already soldered into the wire)
7. Door_Switch=D05
8. Leakage_Switch=D06

I tested the sketch on a Arduino Nano and it is working, now I need to convert everything to the Easy/Newbie PCB.

[SolderNewbie]

@gohan
But i want to power the NRF24 with the battery booster and not directly with the batteries. Is this possible? The NRF24 modules is working with 1.9V than i have to replace the batteries. But with the battery booster i can drain the batteries down to 0.4 V each!

[gohan]

I think I did once a little mod for that case: I shorted Vin and Vout where the radio voltage regulator would be.

PS but I shorted REG and not BAT

[SolderNewbie]

@gohan Thanks for this hint!
I put a jumper into Vo and Vi of the voltage regulator pins and shorten it, that's all! Not needed to shorten REG or BAT jumper! The Vi pin is connected to the Vo of the battery booster and the Vo of the voltage regulator pin is connected to Vcc of the NRF24 module.

Maybe an idea for rev 10? Battery booster powered NRF24 module?

[sundberg84]

@SolderNewbie

If the battery jumper is opened there is not voltage at the NRF24 module and also not at the 3.3 pin of the MysX pin out. Ist this correct?I thought the NRF24 is powered by the battery booster by default. Or did I get it wrong?

This is correct because you dont want to feed 3.3v from the booster to the radio. The radio is very sensitive to noise (which will be the case with the booster) and since the radio can handle down to 1.9v the pcb is used like the description How?>Battery 3.3v @ https://www.openhardware.io/view/4/EasyNewbie-PCB-for-MySensors. This will feed the vattery voltage only (not from Booster) and therefore not give noise to the radio.

As mentioned above by @gohan its possible but not recommended... unless you got some really good modules you will end up with a 2m range on your radio (or no connection at all)

Maybe an idea for rev 10? Battery booster powered NRF24 module?

This is why Rev 1 and 2 never made it... I have been trying this out since 2014 and it just doesnt work. You might get lucky with 1 or 2 modules that works (or pay alot for low noise boosters which isnt my thought with EasyPCB).

I would instead suggest lowering BOD and/or change bootloader.

[sundberg84]

@sincze

use the pins TX/RX

what do you mean? You can find the pins on the MysX connector (bottom left on the PCB). Instructions on how to use the pins isnt my cup of tea. You need to google that or you have to look at the arduino homepage.

There isnt anything to convert from nano to EasyPCB (except to find the right pins). The sketch will work just fine as it is.

[gohan]

@sundberg84 my cheap alixpress booster and CDEbyte NRF24 worked fine on my solar powered outdoor sensor

[sundberg84]

@gohan as I said, I have been doing EasyPCB since 2014 and you might get lucky

You need a great booster and a great radio - this works, but as we all know this combination when shopping from china is pure luck.

[gohan]

I had to do it because the supercap can go to lower than 1.9V, but I noticed it wasn't that bad, probably because I was generous on ceramic caps

[sundberg84]

@gohan - trust me, I have tried all the caps there are on the booster. I also have now recently checked with a oscilloscope but I cant see any major difference (in less noise vs with or without 0,1-10uF cap). I must admit I have more test to do in booster - EasyPCB (cap) so any input is appreciated but im not sure a bigger cap equals less noise. A smaller cap can react quicker than a big one i think and with that it means you have to find a balance with response - capacity. If so, I can see with the booster I have (bad quality) varies a lot on noise, and with that means you should need a different cap on every booster (depending on the noise).

[gohan]

I have a 10uF ceramic on both booster output and near nrf24 socket and it has been working well. For battery powered nodes I'm moving to LiFePo4 batteries that have no need for booster and voltage divider. Much less hassle.

[sundberg84]

@gohan - yea, just as I said above. Moving to another battery or lower BOD/change bootloader is one good way to avoid booster problems. Good to hear its working well for you - lets hope it continues that way.

[SolderNewbie]

@sundberg84 Thanks for clarification! Do you have any idea how long i can power a NRF24 module with two AA batteries until the voltage is to low?

[sundberg84]

@SolderNewbie - it depends on many factors, but one example I have 2xAA, Pro Mini (Led and Voltage reg removed), DHT22, Voltage divider (for battery measurment), booster and sending temp & humidity + battery status every 15min should last 1-1.5 years.

[sincze]

@sundberg84 Got it. In the end it I did not have to use them.

All devices I was looking for to use are working except for my Dallas Temp Sensors.
The resistor is between the wires VCC and DATA in the connectors so not soldered on the board itself.

I checked if pin header
D3 had connection with D3 on the arduino (beep),
GND with GND on the arduino (beep),
VCC with VCC on the arduino (beep) at 4,7v.

So the connector should be okay (no soldering error this time). If I connect the wire to the old Arduino nano the temp sensors are found... Connect them to the PCB.. Nothing found. Well must be something stupid I am missing here right?.

To check D3, I made an RX tranmission Led attached and it flashed fine. So it should be okay.

[sundberg84]

@sincze - that sounds strange.
Is it the same sensor or could the dallas sensor be broken?
Can you see anything in the debug/serial? /(Sometimes you can see -127 and so).

[sincze]

@sundberg84 Strange thing is.. If I unplug the temp cable from the PCB and plug it into the NANO the sketch detects the sensor. The exact same sketch on the mini says "0 sensors found" as I just print the number of sensors detected.
For debugging purposes If I would solder the resistor on the PCB and I have a different temp sensor with resistor within the cabling. Would that hurt (double resistors) ?
Would I have to look for a specific voltage between D3 and GND ?

[sundberg84]

@sincze - so it sounds like you have issues between pcb connector and A0 pin on the atmega328. You could try to do a continuitytest between that - and check soldering job on the MysX connector and on the back on the pro mini (A0)

[sincze]

@sundberg84 Just for the check A0 or D3 (temp sensor)?
As A0 is working, I have a relais attached to it.

[sundberg84]

@sincze sorry - my misstake, D3 offcourse. You can do if from D3 on the MysX connector to D3 on the atmega chip. D3 on the cjip is the upper left pin on the image.

[sincze]

@sundberg84 yes, I have a 'beep' pffffff would a double resistor hurt ?? 1 on pcb the other one in the cable?
I tried connecting it directly to pin 3 on the arduino, no detection, I tried replacing the resistor. nothing. I tried a different temp sensors.. No detection. I moved the new temp sensor to the nano... detected.
I tried an empty Dallas temp only sketch on the mini... no detection. Well Now I'm lost

[dbemowsk]

@sincze Can you possibly send pictures with how you have it connected both on the nano and on the mini? I am thinking that it is something obvious that is being missed.

[sundberg84]

@sincze - and you use the right power source on the PCB? (VCC = 5v and 3.3v = Well... 3.3v) Please send pictures of both setup as mentioned.

[Barna]

Hi Sundberg84,

I have some v8 and now enough time for playing.
I setup with v3.3 2xAA, booster, NRF24, simple door sensor or DHT.
1-2 week and the batteries are discharged, I hear little buzz from the mini or other components.
This is the 2nd built where I meet this problem.
Do you have any idea what component is the failed ?
thanks
Barna

[gohan]

Did you remove the regulator and LED from the pro mini? Have you tried a different booster?

[sundberg84]

@Barna as @gohan said I suspect the booster as well. A small buzz is normally from that hardware.
Also did you implement sleep() ?

[Barna]

@sundberg84 this is not normal buzz, stronger than before.
I have used this source only: https://www.ebay.com/itm/mini-DC-DC-0-8-3-3V-to-DC-3-3V-Step-UP-Boost-Power-Module-For-Breadboard-Arduino-/281556288481?hash=item418e1003e1
which another part could make the buzz ?
yes, I use sleep
sleep(1, CHANGE, SLEEP_TIME); SLEEP_TIME is 900000 , but the node does not wake up and send the battery status, only when door sensor changes.
No, I have not removed the led and regulator, this is the testing period only

[gohan]

Those draw quite some energy, you'd better remove them and see from there

[dbemowsk]

@Barna What if you used a setup like this:

The 3volt tap can be used to power the arduino, and the DHT can be run from the 4.5v. With that you wouldn't need the step up booster.

[sincze]

@sundberg84 @dbemowsk Thank you guys for still trying to help me. I almost gave up on using a Dallas Termp sensor o n a pro mini. As said I even tried connecting the temp sensor directly to the pins with same results. If I connect the pins to my nano, it is being detected and transmitting temp values. I even used a different sketch.. Just for the temp sensor. link found_here. Changed it to use Pin 3 ofcourse. I even connected the whole thing to D2 (resistor back in the wires)... without being succesful either.

[dbemowsk]

@sincze Are you sure you sure you got correct power on the GND and VCC pins on the MySX connector?

[sincze]

@dbemowsk I had those thoughts as well.

The voltage should be okay. I can solder a new Arduino Pro Mini and see if that one wants to work with me

[sundberg84]

Dallas temp sensors needs 3.3v VCC if I remember right. Not 5v.

[sincze]

@sundberg84 haha yes i was wondering that myself so tried it connecting it to 3,3v as well. However on the 5v nano working just fine. Technical specs tell me: Power supply range is 3.0V to 5.5V
also mysensors link
Pretty strange huh.

[sundberg84]

@sincze my mistake. Really strange this... Should work just fine. Can you upload a better resolution picture of your hardware and the sketch you are using?

[zboblamont]

@sincze I have 10 of these DS18B20s strung over approximately 12m monitoring all rooms on both floors of my house and two side lofts, all running on 3.22v from a Pro-Mini. Never have skipped a beat, reporting every 5 minutes, well, aside from a telephone socket which pins went walkabout (the chips are crimped to RJ11s).
There is something not right with the physical arrangement if you can get the same circuit to report at 5v...

[sincze]

@sundberg84 I just soldered a myself a new out of the box pro mini using the same sketch..

10246 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=4,st=OK:21.0
250560 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:21.1
255019 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:22.3
259476 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:23.8
263934 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:25.3
268393 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:26.5
272851 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:27.6
277310 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:28.1
281768 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:28.4
290677 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:28.3
295136 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:28.1
299594 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:27.8
304053 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:27.6
308511 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:27.3
312970 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:27.1
317428 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:26.8
321887 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:26.6
326345 TSF:MSG:SEND,8-8-25-0,s=0,c=1,t=0,pt=7,l=5,sg=0,ft=0,st=OK:26.4

Victory...

[gohan]

Was the pro mini defective or just the pin you were using?

[sincze]

@gohan Don't know. Pin3 could be used to drive the led tx without problems. It only did not work with the temp sensors. I moved the temp sensor to d2.... modified the sketch and it did not work as well. and d2 was driveing rx led. So well root cause unknown... solution: solder a new pro mini and keep the other one for different purpose.

[zboblamont]

@sincze Did you use D2+D3 on all the same devices?

[gohan]

I'd try the other digital pins too

[sincze]

@zboblamont @gohan The Sensor with the replaced Pro Mini is in production now ;-). I'll start soldering a new Easy/Newbie PCB, because once you know how to do it... it is Easy and test the individual pins with a door/window sensor.

[Barna]

Hi Sundberg84,
What could you advise for battery powering (remove led and regulator too) if I would like to use Mini 5V and measure the battery level too ?
thx

Barna

[sundberg84]

@Barna the 5v pro mini are running a 16mhz crystal as default and this needs higher voltage to be stable compred to 8mhz (3.3v pro mini).

I have never tried this so can't give much advice but I would probably take the effort of reprogramming the fuses and bootloader to a internal 1mhz and run the hardware as that (the hardware is the same on 5v except the regulator and crystal )

[gohan]

@Barna why do you want to use a 5v arduino?