I downloaded the CEC Firmware Release V1.200 and also Nextion LCD GUI File and Version 1.1 Files (https://github.com/phdlee/ubitx/releases/tag/1.1)
My Display is a 3.5" Enhanced Version and so I tried to install the file "ubitx_35_E.tft" .
After installation the display comes up but it didi not fill the screen completely .
So, I loaded up the hmi-file by using the serial port of the display - the same result.
What went wrong?
I have an older version which fills the screen complete.
In hope for helpfull hints ...