TTGO build target doesn’t work

[Waldmensch1]

Can someone tell me which is the latest Tag running on TTGO T4? The current Master is too big to get flashed. After removal 2 car vendors (I only need ID3) from Source I can flash but after flash with ttgo build target I only have a red display and serial console works. The ttgo build target only build when set a pin for GSM modem.
Maybe the GSM Modem can be made optional by compiler flag? I tried to remove all occurrences with own compiler flags, but without deep knowledge of code I always run into crash loops after flashing

I know that ttgo is no longer supported but I only search for a simple solution to show the battery temperature of my car somehow and the ttgo I already have in my hobby box. I tried to build older Tags but these doesn’t work as well.

thanks for any hint.