Add Status RGB LED to WiFiManager

• Added CircuitPython_RGBLED compatiblity to _wifimanager.py. This allows you to use external RGB LEDs connected to an ESP32 module.

  • Usage example

To use in CircuitPython, simply install the Adafruit CircuitPython bundle.

To use in CPython, pip3 install adafruit-circuitpython-esp32spi.

Read the docs for info on how to use it.