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Hardware setup

Requirements: a Raspberry PI 2, a SD card with LibreELEC, a TSSP 4P38, some jumper wires

See https://www.raspberrypi.org/documentation/usage/gpio/ for GPIO pins

• Connect 3 V (PIN 1) to receiver V
• Connect Ground (PIN 6) to receiver GND
• Connect GPIO 17 to receiver DATA/OUT

Software setup

1. Mount flash partition writeable: mount -o remount,rw /flash
2. Edit nano /flash/config.txt and insert
   dtoverlay=gpio-ir,gpio_pin=17
   after # End of default configuration and before [all]
3. Remount flash partition readonly: mount -o remount,ro /flash
4. Reboot!

Check basic IR functions

Check that lirc has been startet:

$ dmesg | grep lirc
[    7.370062] rc rc0: lirc_dev: driver gpio_ir_recv registered at minor = 0, raw IR receiver, no transmitter

Kill lircd and start mode2 to see raw events:

$ killall lircd
$ mode2
Using driver default on device /dev/lirc0
Trying device: /dev/lirc0
Using device: /dev/lirc0
Warning: Running as root.
space 16777215
pulse 446
space 3003
pulse 508
space 2991
pulse 551

Create keymap

$ irrecord /storage/.config/lircd.conf

Now configure these keys:

KEY_UP, KEY_DOWN, KEY_LEFT, KEY_RIGHT, KEY_PLAYPAUSE, KEY_MENU, KEY_OK

Sources

• https://libreelec.wiki/configuration/ir-remotes#lirc-support
• https://www.einplatinencomputer.com/raspberry-pi-infrarot-empfaenger-und-fernbedienung-einrichten/
• https://oberguru.net/elektronik/raspberrypi/ir-raspberry-pi-openelec.html
• https://forum.libreelec.tv/thread/22434-libreelec-pi-zero-dac-zero-ir-remote-problem/?postID=143018&highlight=gpio_in_pin#post143018