Turn OffLEDs

The following is helpful if you purchased the RemotePi addon board for your raspberry pi that provides IR Remote control and a Power button… If so, you may wish to disable the built-in bright LED and just show the one from RemotePi.

RED Power LED (LED1)

The line below is used to turn off the power LED
sudo sh -c 'echo 0 > /sys/class/leds/led1/brightness'

The line below is used to restore the power LED
sudo sh -c 'echo 255 > /sys/class/leds/led1/brightness'



YELLOW Activity LED (LED0)

The line below is used to turn off the activity/action LED
sudo sh -c 'echo 0 > /sys/class/leds/led0/brightness'

Alternatively, the mmc0 trigger can be deactivated like this:
sudo sh -c 'echo none > /sys/class/leds/led0/trigger'

The line below is used to restore the activity/action LED
sudo sh -c 'echo mmc0 > /sys/class/leds/led0/trigger'




DIM RemotePi LED via MSL Config Tool
See: https://www.msldigital.com/pages/configuration-tool

1. Write MSL Config Tools to SD Card.

2. Obtain Raspberry Pi Firmware and replace files on the SD Card
https://github.com/raspberrypi/firmware/tree/master/boot

3. Boot Raspberry Pi with SD Card

After boot, login: 
Username: root
Password: raspberry

See help with ./mslconfigtool

Dim to 10%:

./mslconfigtool -g=10


Note: Solution to MSL Config Tool Stuck at Rainbow Boot

https://www.raspberrypi.org/forums/viewtopic.php?t=138163#p917901
https://www.raspberrypi.org/forums/viewtopic.php?t=138163#p920635



Turning Off the LED will not stick after reboot, thus... turn it off at boot with systemd...

Step1 - Create a bash script "turnoffpowerled.sh" for turning off the LED
===================
#!/bin/bash
sudo sh -c 'echo 0 > /sys/class/leds/led1/brightness'
====================
Optionally, Create a bash script "turnonpowerled.sh" for turning oon the LED
===================
#!/bin/bash
sudo sh -c 'echo 255 > /sys/class/leds/led1/brightness'
====================

Step2 - Make the script files executable
chmod 744 ~/turnoffpowerled.sh
chmod 744 ~/turnonpowerled.sh

Note: At this point you can test both these by running them.
eg. ~/turnoffpowerled.sh

Step3 - Create a Service Unit file
Go to "/etc/systemd/system"
Create an empty service file: 
sudo nano turnoffled.service

Add the following contents to the service file:
=====================
[Unit]
Description=TurnOffLED

[Service]
ExecStart=/home/osmc/turnoffpowerled.sh

[Install]
WantedBy=default.target
=====================

sudo chmod 664 /etc/systemd/system/turnoffled.service
sudo systemctl daemon-reload

To Enable Run at Boot:
sudo systemctl enable turnoffled.service

To Start it Manually:
sudo systemctl start turnoffled.service

To Stop it Manually: 
sudo systemctl stop turnoffled.service