LIRC stands for "Linux Infrared Remote Control", a program to use infrared devices (like your remote control from your TV) with linux.
This article covers using LIRC with serial or USB infrared devices.
- 1 Installation
- 2 Serial receivers
- 3 USB receivers including most onboard devices
- 4 Making a configuration file
- 5 Run LIRC at bootup
- 6 Program specific configuration
- 7 Device Specific Examples
- 8 Troubleshooting
- 9 External Resources
First install LIRC with pacman:
# pacman -S lirc
This will also install the lirc-utils package as a dependency.
Now there might be a problem: the module lirc_serial is build to use ttyS0 (COM1), if your device is not connected to ttyS0, you will have to either change the module-options or rebuild the LIRC module. If your device is connected to ttyS0, you can skip this step
To change the options for the lirc_serial module, you edit Template:Filename and add this line:
options lirc_serial io=0x2f8 irq=3
You should change the values after io and irq to reflect you serial port settings, the values above may work for you if you are using ttyS1 (COM2) to connect your IR-device. But you will find the correct values by checking dmesg:
$ dmesg | grep ttyS
Building the lirc_serial module for another ttySx
Copy the LIRC files to a directory you choose yourself:
$ cp /var/abs/extra/system/lirc /some/dir
$ cd /some/dir
Edit the PKGBUILD in that directory.
Replace the line:
./configure --enable-sandboxed --prefix=/usr \ --with-driver=all \\ return 1[/code]
./configure --enable-sandboxed --prefix=/usr \ --with-driver=com2 \ || return 1[/code]
Where you replace com2 with the com-port you need.
Build and install the package:
$ makepkg # pacman -U lirc-version.pkg.tar.gz
Now try to load the serial module:
# modprobe lirc_serial
If this produces an error which says your serial port is not ready, you have the problem that your serial port support is build into the kernel and not as a module (in the default arch kernel it is build into the kernel)
If it is built into the kernel you will have to do the following (remember that it is built into the kernel, you will need to make some changes later too)
You will have to release the serial port:
# setserial /dev/ttySx uart none
(Replace x with your port number)
Load the module again:
# modprobe lirc_serial
Now it should not show any errors, and the modules lirc_serial should be listed in lsmod
USB receivers including most onboard devices
This outlines the general procedure, the mceusb module which is used by many devices is used as an example.
# modprobe mceusb
Start the LIRC daemon:
$ /etc/rc.d/lircd start
Test it with irw, it will output the commands received by the IR receiver that match your Template:Filename file. So start irw, point your remote and start pressing buttons.
$ irw 000000037ff07bfe 00 One mceusb 000000037ff07bfd 00 Two mceusb 000000037ff07bfd 01 Two mceusb 000000037ff07bf2 00 Home mceusb 000000037ff07bf2 01 Home mceusb
The above procedure however has been simplified and may not work that easily. One of the reasons the lircd daemon may not be working is because it expects to be run at startup and needs root permissions because it will create device nodes in Template:Filename. Try "man lircd" for more information.
Continue with #Making a configuration file
Setup a HID device with LIRC
Some remotes are supported in the kernel where they are treated as a keyboard and mouse. Every button on the device is recognized as keyboard or mouse events which can be used even without LIRC. LIRC can still be used with these devices to gain greater control over the events raised and integrate with programs that expect a LIRC remote rather than a keyboard. As drivers are migrated to the kernel, devices which use to only be useable through LIRC with their own Template:Filename files become standard HID devices.
Some HID remotes actually simulate a USB infrared keyboard and mouse. These remotes show up as two devices so you need to add two LIRC devices to Template:Filename.
First we need the Template:Filename device for our remote:
$ cat /sys/class/rc/rc0
One of the files should be input#, where the number matches the event# of the device. (To clarify you can check that directory, it will have an event# file.
then go to Template:Filename
$ ls -l /dev/input/by-id
You should find a file that symlinks to the input# above, and possibly others with a similar names for mouse events.
lrwxrwxrwx 1 root root 9 10月 14 06:43 usb-3353_3713-event-if00 -> ../event9 lrwxrwxrwx 1 root root 10 10月 14 06:43 usb-3353_3713-event-if01 -> ../event10
Here 'usb-3353_3713-event-if00' and 'usb-3353_3713-event-if01' are the Linux input device event for our HID device, one for the keyboard, another for the mouse.
Then, we need to edit Template:Filename. This file contains the parameters for LIRC daemon
# #Parameters for daemon # LIRC_DEVICE="/dev/input/by-id/usb-3353_3713-event-if00" LIRC_DRIVER="devinput" LIRC_EXTRAOPS="" LIRC_CONFIGFILE="/etc/lirc/lircd.conf"
In order to launch the LIRC daemon for HID remote, You must enable evdev module first
# modprobe evdev
Making a configuration file
You need a configuration file for your remote control copied or symlinked to Template:Filename. A number of devices have already been included with the lirc package, they can be found in Template:Filename. If your specific device is not included, the LIRC site offers configuration files for a large number of extra devices.
If your device does not already have a config file, you can create it yourself with the command:
# irrecord -d /dev/lirc0 /tmp/my_remote
Just follow the instructions. The resulting file, Template:Filename, should then be copied to Template:Filename. If you want to use several remotes, you repeat the irrecord step with each remote and different filenames, and then concatenate all the resulting files into Template:Filename:
# cat /tmp/my_remote /tmp/my_remote2 /tmp/my_remote3 > /etc/lirc/lircd.conf
First start the lircd daemon:
# /etc/rc.d/lircd start
A good way to see if LIRC is running is to run irw.
When you press a button, you should see something like this:
0000000000000001 00 play sony2 0000000000000001 01 play sony2 0000000000000001 02 play sony2 0000000000000001 03 play sony2
In this case the remote is called sony2, the button is called play, and LIRC has seen it 4 times.
Run LIRC at bootup
Remember if you had to execute the setserial command while loading the module?
Your serial port support is compiled as a module in the kernel
This is rather easy: you will just have to add lirc_serial to the modules list and lircd to the daemons list in Template:Filename
Your serial port support is compiled into the kernel
This is more complicated, you cannot just add the lirc_serial to the modules list in Template:Filename, as the serial port should be released first.
So I created a custom startup script to fix this problem.
Now load the daemons: add "start_lirc" and "lircd" to the daemons list in Template:Filename
Program specific configuration
Generate your own lircrc with Mythbuntu's lircrc-generator
mythbuntu-lircrc-generator is intended to be started from a system with LIRC installed. It requires that you choose a remote via the LIRC package or have a Template:Filename handy prior to running. It will then produce a sane Template:Filename for the current user.
Enable LIRC support in xine
Now LIRC works, but you have no program that can communicate with LIRC. This section will explain how to make xine work, but you can use xmms and mplayer (and probably a lot of other programs too) to work with LIRC.
Compile xine with LIRC support
Add " --enable-lirc" to the Template:Filename line
Uninstall old xine-ui and install the new one
# pacman -R xine-ui # pacman -U xine-filename.pkg.tar.gz
Configure xine to use LIRC
Let xine produce a default Template:Filename file. In your home directory, type:
$ xine --keymap=lirc>.lircrc
Now, in order to have a functioning xine+lirc, edit the Template:Filename file to your preferences.
However, you may choose to configure LIRC to control more than just xine. If this is the case, you will need to manually edit the Template:Filename file, and add elements.
Xine-ui Mplayer Totem Vlc Rhythmbox
All work with LIRC, but you must enable LIRC support in the program in some cases, such as VLC. Simply copy the vlc packagebuild and edit it so that "--enable-lirc" is one of the compile options for VLC not FFMPEG!
Configure Amarok2 to use LIRC
Depending on your controller model, the following configuration works with Amarok2-svn. This configuration file will work with the MCEUSB controller.
Configure Audacious(2) to use LIRC
Depending on your controller model, the following configuration works with all versions of Audacious, including the mercurial builds. This configuration file will work with the MCEUSB controller.
Additionally, there are other values that may be set according to the model set forth above. This was taken from the lirc.c file from audacious-plugins source code:
Device Specific Examples
There is a dedicated wiki page with information about X10
Asus DH Deluxe series motherboard
Check the output of:
$ cat /dev/usb/hiddevX
where X is 0,1 or bigger, and press some buttons on remote.
If you can see reply, device works fine, follow steps:
1. In file Template:Filename add:
2. Reload LIRC:
ASRock ION series (Nuvoton) quickstart
$ ln -s /usr/share/lirc/remotes/lirc_wb677/lircd.conf.wb677 /etc/lirc/lircd.conf $ /etc/rc.d/lircd restart
Streamzap PC Remote (USB)
To disable this behavior, add the following to Template:Filename:
Section "InputClass" Identifier "Ignore Streamzap IR" MatchProduct "Streamzap" MatchIsKeyboard "true" Option "Ignore" "true" EndSection
- Install both packages (lirc lirc-utils)
- Modprobe both kernel mods (lirc_dev and streamzap) (add these to your MODULES array in Template:Filename to survive a reboot)
- Create your Template:Filename (for this remote, copy Template:Filename to Template:Filename)
- Start lircd via /etc/rc.d/lircd start (add lircd to your DAEMONS array in Template:Filename to survive a reboot)
- Test the remote/lirc with irw
$ irw 00000000000028cc 00 CH_UP Streamzap_PC_Remote 00000000000028ce 00 CH_DOWN Streamzap_PC_Remote 00000000000028c8 00 8 Streamzap_PC_Remote 00000000000028c5 00 5 Streamzap_PC_Remote 00000000000028d2 00 OK Streamzap_PC_Remote 00000000000028d1 00 LEFT Streamzap_PC_Remote 00000000000028d1 01 LEFT Streamzap_PC_Remote 00000000000028d1 00 LEFT Streamzap_PC_Remote 00000000000028d3 00 RIGHT Streamzap_PC_Remote 00000000000028d3 00 RIGHT Streamzap_PC_Remote 00000000000028d3 00 RIGHT Streamzap_PC_Remote 00000000000028d3 00 RIGHT Streamzap_PC_Remote 00000000000028d4 00 DOWN Streamzap_PC_Remote 00000000000028d4 00 DOWN Streamzap_PC_Remote 00000000000028d4 00 DOWN Streamzap_PC_Remote
Buttons processed several times when pressed
Problem in module ir_core which processes IR commands with LIRC at the same time. Simple blacklist it by creating the following file:
After upgrading or installing Arch, an existing configuration stopped working
Kernel module change
As of kernel 2.6.36, LIRC modules have been included in the kernel. Arch's lirc package has included the older kernel modules, which work with lircd without any additional configuration. However, a recent update removed those older modules, which results in the stock kernel modules being used. Unfortunately, these kernel modules treat the remote as a keyboard by default, which is incompatible for lircd. To correct this, put the following line to Template:Filename: Template:File You may also run that command as root to enable LIRC for your current session.
http://www.mythtv.org/wiki/Category:Remote_Controls -- MythTV wiki main LIRC article
http://www.mythtv.org/wiki/MCE_Remote -- MythTV wiki on MCE remotes
http://en.gentoo-wiki.com/wiki/LIRC -- Gentoo wiki LIRC how-to
http://aur.archlinux.org/packages.php?ID=33849 -- Lirc/Lircrc Configuration Generator