Bora,
You have an incorrect file loaded for the v6 board.? The correct version is in the attached zip file on GitHub:
The uBITXV5 folder has the correct files for the v6 board as well.? You can use Xloader to load the hex file into the uBITX without going through the Arduino IDE.? I have not used the source code for the CEC software, so not sure which define statements you need to set in order to compile for a v6 board.? Just use Xloader and the?UBITXV5_CEC_V1.200_NX.hex file.? I am assuming that you have the Nextion display configured with the correct tft files.
73
Evan
AC9TU
