Thank you very much for your quick reply. It helped us a lot and it finally works !

Hello, we are 2 engineering students who are doing an IoT project for our studies. It is a network of temperature and brightness sensors where the values ​​will be displayed on an e-paper screen. We use esp32 devkitC-V4 and I try to command the 1"54inch e-paper display version B (with black and red ...