Battery voltage from TID/BID/GID

[xymetox]

Hello.
I researched BID/GID and found UUDT request to get voltage from display without electronic climate control (ECC).
To get voltage from display in MSCAN bus you should send UUDT request id246 with PID13 to display.
You should get UUDT response id546 with voltage measured by display. It may differ from battery voltage. It is necessary to make correction. BID reduces voltage by about 0.5V.
For example you send single UUDT request with PID13 to display:
id=0x246 dlc=8 0x03 0xAA 0x01 0x13 0x00 0x00 0x00 0x00.
You will get voltage (multiplied by 10) measured by display in byte 6 of UUDT response message:
id=0x546 dlc=8 0x13 0xXX 0xXX 0xXX 0xXX 0xXX 0x72 0xXX.
In my example byte 6 = 0x72 HEX = 114 DEC= 11.4 Volt voltage measured by display.

[PNKP237]

Very nice, thank you for sharing your research! I'll try to add it to the wiki page in this repo and then make changes so the "measurement display mode" is identical whether the car is equipped with ECC or not.
Have yet to find some motivation to continue working on this, but I hope I'll get something done before March.