Show pageOld revisionsBacklinksExport to PDFFold/unfold allBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. We can control the <color #00a2e8>**blue LED**</color> with the trigger mode in sysfs. The red LED is hard-wired to the power input rail and cannot be changed. **Turn off** <code bash target> su - echo none > /sys/class/leds/blue\:heartbeat/trigger </code> **Turn on** <code bash target> su - echo deafult-on > /sys/class/leds/blue\:heartbeat/trigger </code> **Heartbeat (original state)** <code bash target> su - echo heartbeat > /sys/class/leds/blue\:heartbeat/trigger </code> There are many other trigger modes. But some of them may not work. <code bash target>cat /sys/class/leds/blue\:heartbeat/trigger </code> <WRAP round tip 60%> If you want to turn the <color #00a2e8>**LED**</color> off automatically in boot process,\\ add <color #ff7f27>echo none > /sys/class/leds/blue\:heartbeat/trigger</color> in /etc/rc.local file </WRAP> odroid-xu4/application_note/led_control.txt Last modified: 2017/08/01 16:07by luke.go