Table of Contents

LED

Introduction

This page introduces the usage of Onboard LED indicators under Linux, and leads you to control the LEDs.

Device LED configurations

Device Node name LED color
VIM1/2 /sys/class/leds/sys_led White
VIM3/3L /sys/class/leds/red_led Red
/sys/class/leds/sys_led
VIM1S/VIM4 /sys/class/leds/pwmled
Edge1 /sys/class/leds/red_led
/sys/class/leds/sys_led
Edge2 /sys/class/leds/red_led Red
/sys/class/leds/green_led Green
/sys/class/leds/blue_led Blue

Setup LED

VIM1/2/3/3L

We will take sys_led (white) as an example.

Turn off

Set the LED node parameter to none to turn off the LED: 

$ echo none | sudo tee /sys/class/leds/sys_led/trigger

Turn on

Set the LED node parameter to default-on to keep the LED permanently on: 

$ echo default-on | sudo tee /sys/class/leds/sys_led/trigger

Set LED heartbeat

Set the LED node parameter to heartbeat, to make the LED flash with a heartbeat blink: 

$ echo heartbeat | sudo tee /sys/class/leds/sys_led/trigger

You can also experiment with other parameters.

VIM1S/VIM4

We will take pwmled (white) as an example.

Turn off

Set the LED node parameter to none to turn off the LED: 

$ echo none | sudo tee /sys/class/leds/pwmled/trigger

Turn on

Set the LED node parameter to default-on, to make the LED permanently on: 

$ echo default-on | sudo tee /sys/class/leds/pwmled/trigger

Set LED heartbeat

Set the LED node parameter to heartbeat, to make the LED flash with a heartbeat blink: 

$ echo heartbeat | sudo tee /sys/class/leds/pwmled/trigger

You can also experiment with other parameters.

Edge1

We will use sys_led as an example:

Turn off

Set the LED node parameter to none to turn off the LED: 

$ echo none | sudo tee /sys/class/leds/sys_led/trigger

Turn on

Set the LED node parameter to default-on to keep the LED permanently on: 

$ echo default-on | sudo tee /sys/class/leds/sys_led/trigger

Set LED heartbeat

Set the LED node parameter to heartbeat, to make the LED flash with a heartbeat blink: 

$ echo heartbeat | sudo tee /sys/class/leds/sys_led/trigger

You can also experiment with other parameters.

Edge2

We will use red_led as an example:

Turn off

Set the LED node parameter to none to turn off the LED: 

$ echo none | sudo tee /sys/class/leds/red_led/trigger

Turn on

Set the LED node parameter to default-on to keep the LED permanently on: 

$ echo default-on | sudo tee /sys/class/leds/red_led/trigger

Set LED heartbeat

Set the LED node parameter to heartbeat, to make the LED flash with a heartbeat blink: 

$ echo heartbeat | sudo tee /sys/class/leds/red_led/trigger

The others are similar.

You can also experiment with other parameters.