B4R Library rLedControl

Wrapper for: https://github.com/wayoda/LedControl/

This is an Arduino library to control MAX7219 and MAX7221 Led display drivers.
ESP8266 library: https://www.b4x.com/android/forum/threads/rmax7219ledmatrix.69861

Example: https://www.b4x.com/android/forum/threads/spi-i2c.66420/#post-464711