I am looking to read the status of a battery charger using an Arduino Board. The battery charger shows red when a battery is being charged and green when a battery is charged. I understand that the charger uses a Bi-Color LED.
One option is to use an RGB color sensor (eg. https://learn.adafruit.com/adafruit-color-sensors/overview) but I am looking to see if there is any way I can read the Bi-Color LED directly on the Arduino pins.