Waveshare ESP32-S3-LCD-1.85

ESPHome
1

I’m venturing into using a display in ESPHome for the first time, but I’m having no luck. Any pointers are appreciated.

I am using this device:

I’ve tried using similar code as shared in this thread, since they share similar screens: GUITION 1.8” 360x360 ESP32-S3-JC3636W518 Smart Display

I did change out the pin definitions (except for the EXIO reset pin, which I’m not sure how to reference), and used the init sequence I found in the sample code (in esp_lcd_st77916.c).

My current yaml:

If I comment out the lvgl section and flash, the device is available and I can toggle the switch for the backlight, but with the backlight on the screen is just “snow” (I’m not sure if that’s normal). However, if I flash with the lvgl section the screen remains black and the device does not come online.

Any suggestions for what I’m missing?

2

The LCD reset pin is on an expander so you need to add a component for that - pca9554 I think. Then specify the pin as per the expander docs.

3

Thanks! That helps a bit, but alas I still get the same results.

I updated the gist, but the new bits I added:

i2c:
  sda: GPIO11
  scl: GPIO10
  scan: true

pca9554:
  - id: 'pca9554a_device'

...
    reset_pin: 
      pca9554: pca9554a_device
      number: 2
4

Pin 1, not pin 2. They are 0-based in the config.