To start with, we define the hardware setup by defining the states required to Enable and Disable the LED depending on the type of RGB LED (common cathode) used. If you are using a common anode device, just reverse the Enable and Disable states.
Next, we define the GPIO mapping to the pins to match the wiring we did previously.
We also define some basic color combinations by combining red, green, and/or blue together, as shown in the following diagram:
LED color combinations
We define a series of useful functions, the first being led_setup(), which will set the GPIO numbering to GPIO.BOARD and define all the pins that are to ...
