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EV3 LEDs

  1. Documentation
  2. Kernel Hacker's Notebook
  3. EV3 LEDs

The 2 LEDs on the EV3 are connected via GPIOs (2 each). Each LED has 3 colors: red, amber and green. Turning on a single GPIO will change the LED to red or green. Turning on both GPIOs will change the LED to amber (orange).

LED GPIO Description
0 6-13 Left, Red
1 6-7 Left, Green
2 6-14 Right, Green
3 6-12 Right, Red

Device Driver

We are using the pwm-gpio and leds-pwm drivers to be able to control the LEDs. This provides a standard interface for using the LEDs. The LED devices are defined in board-legoev3.c.