Odroid C2: Change function of Blue LED

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Odroid C2: Change function of Blue LED

Postby Fourdee » Thu Jan 19, 2017 4:03 pm

List available options:
Code: Select all
cat /sys/class/leds/blue\:heartbeat/trigger

none nand-disk timer oneshot [heartbeat] backlight gpio cpu0 cpu1 cpu2 cpu3 default-on transient flash torch sd emmc battery-charging-or-full battery-charging battery-full battery-charging-blink-full-solid ac-online


Example: Turn off
Code: Select all
echo none > /sys/class/leds/blue\:heartbeat/trigger


Example: link to EMMC usage
Code: Select all
echo emmc > /sys/class/leds/blue\:heartbeat/trigger


Example: link to SD usage
Code: Select all
echo sd > /sys/class/leds/blue\:heartbeat/trigger


Return to default:
Code: Select all
echo heartbeat > /sys/class/leds/blue\:heartbeat/trigger
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Re: Odroid C2: Change function of Blue LED

Postby k-plan » Mon Jan 23, 2017 4:18 pm

To get this blue LED changes persistent on every boot, you have to edit /etc/rc.local

Make a backup:
Code: Select all
cp /etc/rc.local /etc/rc.local.bac


Edit:
Code: Select all
nano /etc/rc.local



Add following lines before "exit 0 ":
[Example - edit or uncomment line you needed.]
Code: Select all
#### switch on blue LED for sd-card activity
echo sd > /sys/class/leds/blue\:heartbeat/trigger

#### switch on blue LED for eMMC activity
## echo emmc > /sys/class/leds/blue\:heartbeat/trigger

#### switch on blue LED for heartbeat (Default)
## echo heartbeat > /sys/class/leds/blue\:heartbeat/trigger

#### switch off blue LED
## echo none > /sys/class/leds/blue\:heartbeat/trigger

exit 0
If you find our project or support useful, then we’d really appreciate it if you’d consider contributing to the project however you can.
Donating is the easiest – you can use PayPal and Bitcoin.
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