@sundberg84 Hi, I'm not using level converters becuse I use a ProMini with 3,3V (with W5100 and rfm69hw). Maybe I have a small clue: The Interrupt Pin is high all the time. It seems that the interrupt request from the RFM Module is not processed. I cant see interrupts when I start a node. (With a working setup with ESP8266 and RFM69, the pin is low most of the time except when new packets arrive from a sensor).

@siklosi said: I succeeded compiling MYSBootloader with Oitzu's help. I have compiled MYSbootloader for 8 and 16Mhz for all 127 channels. Here is archive... so you can try it. I have not yet tested it but it should be working https://www.dropbox.com/s/0gjxp9wl2uukj4y/Mysbootloader-8-16-1-127.zip?dl=1 Thanks for posting this! It didn't work for me when I tried with an UNO but it did when I used the USBASP V2.0. Thanks again!

Ok, finally I found the Problem. I changed the prescaler value of Timer0 becuase I needed a higher PWM Frequenciy. Unfortuneatly this also affects the millis() function that is used in gw.wait. It turns out taht with the changed TImer 0 Prescaler 1ms was not 1ms anymore but less. So the gw.wait(750) where only 750ms/64 which is not enough for DS18S20 conversion to take place.

Did you guys managed to have it working with latest mysensors version?

Or use development branch where this dependency has been removed from the library.

One last thing I'd like to clarify after re-reading my previous post. The correct send string I entered in the terminal is without trailing ";" - like it was supposed before. As mentioned, the problem has been the BAUD rate of 156k with 8MHz crystal.. So the correct command which will change the PWM -Dimmer level on node 3 to 50% is: 3;0;1;0;3;50\n