Letux Kernel


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Table of Content

How to control the LEDs


are controlled by the TCA6507 driver.

LED numbers

The examples below all refer to LED 0. Substitute the correct LED number:

  • 0: AUX - Red
  • 1: AUX - Green
  • 3: Power - Red
  • 4: Power - Green
  • 6: WLAN/Bluetooth Reset (active low - don't use blink modes)

LED on

LEDs are switched through the TCA6507 driver ($value = 0: on, 1: off, 2..255: blinking/pulsing)

echo "0" >/sys/class/leds/tca6507.0/brightness

LED permanently off

echo "1" >/sys/class/leds/tca6507.0/brightness

LED blink

Values 2..255

echo $value >/sys/class/leds/tca6507.0/brightness


make AUX button blink yellow (red+green)

echo 128 >/sys/class/leds/tca6507.0/brightness
echo 128 >/sys/class/leds/tca6507.1/brightness

make AUX button blink between red and yellow (red+green)

echo 0 >/sys/class/leds/tca6507.0/brightness
echo 128 >/sys/class/leds/tca6507.1/brightness