FriendlyELEC-Forum

Posted: **Fri Aug 12, 2016 7:29 am**

Hi,

Is there a way to disable the blinking blue LED? In the night it is too bright.

Thanks.

Posted: **Fri Aug 12, 2016 7:51 am**

There are two "easy" options, but I think you are looking for the third ;-)

1. physically remove the LED (eg. with screwdriver), I did similar with dangerous diode for battery charged RTC module
2. Disable blinking code in firmware and rebuild it
3. find some command/setting that allows to disable/enable blinking

Perhaps somebody from Friendlyarm can help on 3?

Hermann.

Posted: **Fri Aug 12, 2016 2:14 pm**

Found it out.

To turn the heartbeat off:

Code: Select all

echo none > /sys/class/leds/blue_led/trigger

To turn it back on:

Code: Select all

echo heartbeat > /sys/class/leds/blue_led/trigger

Posted: **Sat Aug 13, 2016 9:58 am**

Thanks for that information!
Doing "cat" of that file seems to give the allowed values, with current value in square brackets:

Code: Select all

root@FriendlyARM:/sys/class/leds/blue_led# cat trigger
none mmc0 timer heartbeat backlight [gpio] default-on 
root@FriendlyARM:/sys/class/leds/blue_led#

none, time, heartbeat and default-on have obvious visible effects.
If you want it crazy you can let blue led on heartbeat and set green led (from "defaut-on") to timer ;-)

Not sure what mmc0, backlight and gpio are good for.
Is there any spec or document where this infomation can be found?

Hermann.

FriendlyELEC-Forum

Is it possible to disable the blinking blue LED?

Is it possible to disable the blinking blue LED?

Re: Is it possible to disable the blinking blue LED?

Re: Is it possible to disable the blinking blue LED?

Re: Is it possible to disable the blinking blue LED?