Keep in mind to use a 2 GB micro SD card for doing the upgrade if you have old units. It was not working for me with a 64GB micro SD card. My units are around 6 years old.
Hi @maartenwitteman
Attached a wetransfer link which is available 3 days.
This firmware is for the ethernet model of the control units!!! Use at your own risk.
I received the files from the service department some time ago now. Maybe in the meanwhile there are other firmware updates available.
I’ve almost finished implementing RF protocol decoding and was able to emulate my home thermostat using a CC1101 + ESP32. That means I can enable and disable heating without the original thermostat.
Would anyone be interested in this project? If there’s interest, I can upload the code to GitHub.
The idea is to build a device that could replace existing RF thermostats and allow control through Home Assistant. I’m not sure how many people would find this useful, so I wanted to check before packaging everything up.
FF FF FF FF AA AA AA AA AA AA AA AA AA AA preamble (4×0xFF + 10×0xAA), firmware-written
7E HDLC start flag
88 00 <net 2B> <ep 2B> <seq 2B> <body...> L2 header + payload
<CRC-16/X.25 over header+body, little-endian on the wire>
7E HDLC end flag
