I have a couple of old dev boards with weird microcontrollers (old ARM7TDMI from NXP) lying around.
I would like to use some of them for very basic nodes like door sensor with only presentation message and set value messages.
As porting the complete MySensors library on my MCU does not really make sense, I am looking at the way to build the actual data frames that mysensors is using when passing messages through the radio.
The only informations I was able to find on the website is a description of the serial API but nothing on the actual data that's transmitted through the radio.
Would anyone have any resources or any more details on that ?