How to Control the On-board RGB LEDs on VOXL

Table of contents


VOXL has a small surface mount RGB LED located next to the fan connector J6. LEDs can be accessible using the following devices:

/sys/class/leds/red
/sys/class/leds/green
/sys/class/leds/blue

Query maximum brightness setting.. Should be 255 (optional):

cat /sys/class/leds/red/max_brightness
255

Set PWM period (microseconds) for LED PWM control (optional.. default 1khz)

#set to 1kHz
echo 1000 > /sys/class/leds/red/pwm_us

Set brightness of 127 (out of 255) for red LED:

echo 127 > /sys/class/leds/red/brightness

Turn red LED off:

echo 0 > /sys/class/leds/red/brightness