SunFounder ESP32 Starter Kit
The PWM pins pin27, pin26 and pin25 control the Red, Green and Blue pins of the RGB LED respectively, and connect
the common cathode pin to GND. This allows the RGB LED to display a specific color by superimposing light on these
pins with different PWM values.
Wiring
The RGB LED has 4 pins: the long pin is the common cathode pin, which is usually connected to GND; the left pin
next to the longest pin is Red; and the two pins on the right are Green and Blue.
1.7. 2.3 Colorful Light 27
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