Display 7.5 B with ESP32

[mrmiijo]

Hi,
I am new to working with displays.

I used a Waveshare e-ink display 7.5b (three-color).

For this, I connected it to an ESP32 Lolin D32.

Using Arduino IDE, I uploaded various example codes and even my own codes to display anything on the screen. However, I was never able to get anything to show on the screen. When I used an RPi4, it worked without any problems. But I want to use the ESP32 for battery-powered operation and longer lifespan.

What could I be doing wrong? When powering it, the PWR cable remains unconnected. Even when I connected it along with VCC, it didn’t help.

Can someone please help me?

[purplepotables]

I am also having this issue. I have rewired everything 5 times over. Works on the pi, does not on esp32.