Could anyone add the Waveshare ESP32-S3-Matrix board please?

[daewvey]

This one https://www.waveshare.com/esp32-s3-matrix.htm

[robertlipe]

Platformio is not supporting their users on boards using Espressif chips. See #1225.

It's likely that most any S3 (especially of the supermini s3 form) board works well enough to get going.

Something like FastLED or Espressif's led_strip modules will be necessary for the blinkies. It's "just" a WS2812 strip attached to a GPIO and rather out of scope for Platformio iteself.

Alternately, you can change to the pioarduino project, which I just verified has support for this board already integrated.