visit IOTSHARING.COM for more
This library is only for MAX7219.
the original version is for esp8266, I modified a little to adapt with esp32.
Just clone the code and copy it Arduino/libraries folder
Demo 5: How to use Arduino ESP32 to display information on SPI LED matrix http://www.iotsharing.com/2017/05/how-to-use-arduino-esp32-to-display-spi-led-matrix.html
install platform io
pip install -U platformio
oder in vscode die extension
compile with platform io
pio run
compile with platform io
pio run -t upload