lirc

Overview ¶

Package lirc implements InfraRed receiver support through native linux app lirc.

Configuration ¶

lircd MUST be configured via TWO files: /etc/lirc/hardware.conf and /etc/lirc/lircd.conf.

See http://www.lirc.org/ for more details about daemon configuration.

/etc/lirc/hardware.conf

This file contains the interaction between the lircd process and the kernel driver, if any. This is the link between the physical signal and decoding pulses.

/etc/lirc/lircd.conf

This file contains all the known IR codes for the remotes you plan to use and convert into key codes. This means you need to "train" lircd with the remotes you plan to use.

Keys are listed at http://www.lirc.org/api-docs/html/input__map_8inc_source.html

Debugging ¶

Here's a quick recipe to train a remote:

# Detect your remote
irrecord -a -d /var/run/lirc/lircd ~/lircd.conf
# Grep for key names you found to find the remote in the remotes library
grep -R '<hex value>' /usr/share/lirc/remotes/
# Listen and send command to the server
nc -U /var/run/lirc/lircd
# List all valid key names
irrecord -l
grep -hoER '(BTN|KEY)_\w+' /usr/share/lirc/remotes | sort | uniq | less

Raspbian ¶

Please see documentation of package periph/host/rpi for details on how to set it up.

Hardware ¶

A good device is the VS1838. Then you need device driver for hardware accelerated signal decoding, that lircd will then leverage to decode the keypresses.