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 ...

Use pins that support digitalRead() and digitalWrite() reliably (most GPIOs). Avoid pins already used for: Hardware serial (e.g. 0, 1 on some boards), unless you know the tradeoffs. Critical timing or ...