ABB KNX 6120 U-102-500 Bus Coupler Unit

[Nitin]

Hello
I have tried search but unable to get any clear answer. Gemini is able to access a lot of properitory information (the KNX.org data) but is giving me conflicting answers.

My plan is to use this coupler to ESP32. The ESP32 does the translation to CN105 to the Mitsubishi slim.
The idea is to use PEI mode 14 or 16 using the resistor trick.
If using data block protocol - its a TPUART - and openknx should be able to handle it.
If using message block protocol - I can inform openknx to read telegrams and act.

But - When I gave my BCU info to gemini - Which was programmed as thermostat (6120+6128 on top)- It asked me to sketch to the PEI pins emulated 6128 (ie, post KNX KNX DPT of temp and on off etc). Also - since it read mask as 0013, it asked me to compile openknx with BIM132 module (instead of nanoBCU- which is TPUART) and told me it will work.

Has anybody tried that (want to learn from collective knowledge).
I have lots of these BCU lying around and want to use them with ESP32 - and avoid IP/wifi.
Thank you

[thewhobox]

OpenKNX (or more the underlaying knx stack) only supports Mask 07B0 (TP), 05B0 (IP) and 0912 (TP/IP Coupler).

I also dont know the TPuart chip which is used by ABB.
AFAIK we only support the Siemens TPUart+ or NCNXXXX.