Awesome
Adafruit-LED-Backpack-Library 
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Compatibility
| MCU | Tested Works | Doesn't Work | Not Tested | Notes |
|---|---|---|---|---|
| Atmega328 @ 16MHz | X | |||
| Atmega328 @ 12MHz | X | |||
| Atmega32u4 @ 16MHz | X | |||
| Atmega32u4 @ 8MHz | X | |||
| ESP8266 | X | |||
| ESP32 | X | |||
| ESP32S2 | X | |||
| ESP32S3 | X | |||
| Atmega2560 @ 16MHz | X | |||
| ATSAM3X8E | X | Use SDA/SCL on pins 20 & 21 | ||
| ATSAM21D | X | |||
| ATtiny85 @ 16MHz | X | Use 0 for SDA, 2 for SCL, examples may need Serial references removed | ||
| ATtiny85 @ 8MHz | X | Use 0 for SDA, 2 for SCL, examples may need Serial references removed |
- ATmega328 @ 16MHz : Arduino UNO, Adafruit Pro Trinket 5V, Adafruit Metro 328, Adafruit Metro Mini
- ATmega328 @ 12MHz : Adafruit Pro Trinket 3V
- ATmega32u4 @ 16MHz : Arduino Leonardo, Arduino Micro, Arduino Yun, Teensy 2.0
- ATmega32u4 @ 8MHz : Adafruit Flora, Bluefruit Micro
- ESP8266 : Adafruit Huzzah
- ESP32 : Unexpected Maker tinyPICO
- ESP32S2 : Unexpected Maker tinyS2
- ESP32S3 : Unexpected Maker tinyS3
- ATmega2560 @ 16MHz : Arduino Mega
- ATSAM3X8E : Arduino Due
- ATSAM21D : Arduino Zero, M0 Pro
- ATtiny85 @ 16MHz : Adafruit Trinket 5V
- ATtiny85 @ 8MHz : Adafruit Gemma, Arduino Gemma, Adafruit Trinket 3V