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ODROID-U3 update (#7)

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Migration from Arch Wiki
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Jason Ryan 2017-02-26 12:13:34 +13:00 committed by Kevin Mihelich
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ODROID-U3.md
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@ -12,3 +12,25 @@ ctl.!default {
card 0 card 0
} }
``` ```
## LEDs
ODROIDs have dual LEDs: a red power LED which is always on if power is
supplied, and a blue LED which can be configured.
By default, the blue LED is a heartbeat LED, which flashes when the kernel is
running. This can be configured in `/sys/class/leds/led1/trigger`.
To list available triggers:
# cat /sys/class/leds/blue:heartbeat/trigger
Replace TRIGGER with one of the available triggers. This setting will apply
instantly, but be lost upon reboot.
# echo TRIGGER > /sys/class/leds/blue:heartbeat/trigger
To create a persistent configuration, edit or create
`/etc/tmpfiles.d/leds.conf`:
w /sys/class/leds/blue:heartbeat/trigger - - - - TRIGGER