“How can I make my RGB 40x40 panel work? I would appreciate your guidance. Thank you.”
First of all - please use English on international forum
“How can I make my RGB 40x40 panel work? I would appreciate your guidance. Thank you.”
SmatrMatrix library doesn’t support panels with 40 pixel height.
Use another HUB75 libraries: Adafruit Protomatrix, ESP32-HUB75-MatrixPanel-DMA or DMD_STM32