This information applies to following devices:

Odroid N2
Odroid N2+
Odroid C4
Odroid HC4
Amlogic devices with CoreELEC BL301 blob injected

CoreELEC comes with a list of predefined IR power codes. There are codes are for:

Hardkernel
Minix
Beelink
Khadas
MCE
…

This option can be accessed by navigating to:

Settings
CoreELEC
Hardware
IR Remote Power Code

If there is no matching IR power code predefined, this option can be used to find the devices unique IR power code.

Since CoreELEC uses Meson_IR by default, it is possible to scan a device for the IR remote wakeup code and apply this code to the file config.ini

IMPORTANT: If a Meson_IR remote is used with the device, remove or rename any remote.conf located in:

/flash/

and, or:

/storage/.config/

After a reboot the meson-ir device will be active.

SSH into device and stop the Kodi and eventlircd services:

systemctl stop kodi
systemctl stop eventlircd

run ir-keytable with option -u

ir-keytable -u

press the desired button for wake up on the IR Remote

If the decoded protocol is implemented a code like will show:

Received IRMP code: remotewakeup='0xbf40fe01', decode_type='0x0', remotewakeupmask='0xffffffff'

Enter these values in the config.ini file.

On the next suspend/power off, the device should now be able to wake up by pressing the preferred button with the previously scanned IR code.

Support for a remote wakeup user file was implemented into CoreELEC February 2021

Naming convention:

(name).remotewakeup 
eq: mytvbox.remotewakeup

Custom wakeup code file syntax:

remotewakeup='0xaabbffff'
decode_type='0x0'
remotewakeupmask='0xaabbffff'

Location: /storage/.config/

touch /storage/.config/H96ProPlus.remotewakeup
vi /storage/.config/H96ProPlus.remotewakeup

insert

remotewakeup='0xbf40fe01'
decode_type='0x0'
remotewakeupmask='0xffffffff'

[ESC] :wq [ENTER]
reboot

After reboot the IR wakeup code should be available in CoreELEC settings.

Error messages

When receiving:

/sys/class/rc/: No such file or Directory

force meson-ir modus:

touch /storage/.config/remote.force_meson_ir
reboot now

After reboot the above command should work, and the file remote.force_meson_ir can be deleted to re-enable the meson-ir protocol.

If the decoded protocol is not implemented a message similar to this one will appear:

Received IRMP code: scancode='0x00251001', IRMP protocol = 7, decode_type is undefined!

In this case an implementation/code mapping for u-boot would be needed.

If there is no message, the IR pulses need to be debugged to detect the correct IR protocol:

echo 2 > /sys/module/rc_core/parameters/debug

The received IR pulses will be printed to the kernel console and can be read by entering

dmesg

config.ini can be edited in 2 different ways:

The easiest way to edit the config.ini file is to insert the USB Flash Drive or (μ)SD card with CoreELEC into a Personal Computer and edit the values remotewakeup, decode_type and remotewakeupmask with a unix compatible file editor.