This will not work with Arduino IDE 1.6.5 (or below) or with non ESP32-S2/S3 devices (e.g. Arduino UNO, Arduino MEGA, etc.). To use this library you need to have Arduino core for the ESP32 installed.
SmartMatrix Library is designed to refresh HUB75 LED matrix panels and APA102-compatible addressable LEDs with high quality graphics, using simple Arduino sketches. 128x64 HUB75 Panel Driven with ...