I did not get it working (yet)

[tonbor]

I adjust and tried your code, I got it compiled without errors, but blank screen. Perhaps the gpios are different with your code. My device is a 7 inch JC1060P470C_I_W
My P4

Your P4 Nano

Waveshare7 - kopie.txt
No serial output from setup() this what I get from debug [ 1][D][Waveshare7.h:28] LGFX(): [LGFX] pkg_ver : 00

Arduino_GFX and lvgl are working ok with this device

Any idear?