I had this problem, turns out that the
iNet ready sticker is misleading, mine was solved by swapping out the main control panel with one on a higher FW version, I had to pay for that which was irritating.
If we’re lucky, the serial bus that the system operates on will be basic unencrypted serial data, I really can see Truma adding encryption since it’s a closed system.
But it’ll need someone that understands how to
sniff serial data to reverse engineer the stream. I’ve not seen a list of codes for sensors or binary controls, and I don’t think Truma would be keen to offer up this anytime soon. But it might be possible to jam in an ESP8266 or an FTDI module to
listen in to the traffic, then activate various known functions to try and determine what each one looks like on the bus. Would be quite easy to warm up the main space thermal sensor for example…?