This module can light up different colors to show different status.
The “Cathode” pin is the ground/negative pin. By also supplying positive voltage to one of the other pins you are able to turn on the LED. Note that you can supply positive voltage to multiple pins and get different color.
| Pin | Description |
|---|---|
| B | Blue LED |
| G | Green LED |
| R | Red LED |
| (-) | Ground |