I spent a bit of time with a solder pump and solder wick getting rid of the bridges across the pads and I have no shorts but the one node refuses to connect.

I'm using the si7021 sensor that's been tested on a test node I have set up. It's connecting and getting a node ID, sends the variable names and then seems to stop without any errors.

4296 !TSF:MSG:SEND,3-3-0-0,s=255,c=3,t=11,pt=0,l=25,sg=0,ft=0,st=NACK:Temperature Humidity node
4343 !TSF:MSG:SEND,3-3-0-0,s=255,c=3,t=12,pt=0,l=3,sg=0,ft=1,st=NACK:2.0
4352 MCO:SLP:MS=500,SMS=0,I1=255,M1=255,I2=255,M2=255
4358 MCO:SLP:TPD
4360 MCO:SLP:WUP=-1
4403 !TSF:MSG:SEND,3-3-0-0,s=0,c=0,t=7,pt=0,l=10,sg=0,ft=2,st=NACK:Plants Hum
4411 MCO:SLP:MS=500,SMS=0,I1=255,M1=255,I2=255,M2=255
4417 MCO:SLP:TPD
4419 MCO:SLP:WUP=-1
4427 TSF:MSG:SEND,3-3-0-0,s=1,c=0,t=6,pt=0,l=11,sg=0,ft=3,st=OK:Plants Temp
4435 MCO:REG:REQ
4450 TSF:MSG:SEND,3-3-0-0,s=255,c=3,t=26,pt=1,l=1,sg=0,ft=0,st=OK:2
4458 TSF:MSG:READ,0-0-3,s=255,c=3,t=27,pt=1,l=1,sg=0:1
4464 MCO:PIM:NODE REG=1
4466 MCO:BGN:STP

Thanks, that works. I had a lot of issues soldering on the radio, I now have 1 of 2 working getting node ID but it's still not sending any temp/hum data and I'm not seeing any errors.

Sorry, probably something simple but when I enable DEBUG I get an error "'SLEEP_TIME' does not name a type" on the line "SLEEP_TIME = 15000UL; // If debug, TX every 15s"

Okay thanks. I think the "Clear Eeprom" MySensors sketch would have helped it I'd known about it. As part of my troubleshooting I was swapping Arduinos around which may have added to my confusion.

Thanks for taking the time to look at this.

Initially I used your unedited sketch on node #1 until I knew the LEDs and fan were working properly. I then added 1 sensor at a time and tested until I had all the sensors I wanted. It ran fine for several weeks. I then used that same sketch in node #2, that's when #1 started to do strange things, like the LED turning on when I powered in #2. That's when I made the changes to "string location" and "define SN". Then I put the same sketch into node #3 and nothing happened. I checked debug and saw it was being assigned the same node ID as #1. That's when I contacted you to double check about other changes needed.

I've since hard coded the node ID for #2 and #3 and everything seems okay, although my RFLink gateway crashed after they powered up but that is probably a coincidence. I rebooted Domoticz and everything seems stable now. I have node #2 and #3 just sitting on my bench with only power hooked up to them. I'll have to do more testing with fans and LED connected later today. I soldered 1-wire sensors on them and screwed in external 1-wire sensors and none of them are showing up although I have them enabled in the sketch so I'll need to check my soldering.

I came over from Terraforums to ask a MySensors question. First off, thank you very much for putting in the time to design, build and share this device. It is exactly what I needed when I didn't even know I needed it. I'm pretty good at hardware but very weak at coding, so-so with Arduino but as far as Domoticz I have a long way to go.

So to my question; if I'm building 3 of these what changes do I have to make in the code to make each one unique? I changed String Location = "Plants"; and #define SN "MySGrowLED" but I'm thinking there is more to it than that. So far #1 has been working flawlessly for over 3 weeks but when I powered up #2 I had problems. The #1 was sitting with LED and Fan OFF. When I powered up #2 the LED and fan on #1 went to 100%, which is the default setting for #2. Hope that makes sense and you can point me to a solution.