Provided by: v4l-utils_1.12.5-1_amd64 bug


       ir-ctl - a swiss-knife tool to handle raw IR and to set lirc options


       ir-ctl [OPTION]...
       ir-ctl [OPTION]... --features
       ir-ctl [OPTION]... --send [pulse and space file to send]
       ir-ctl [OPTION]... --scancode [protocol and scancode to send]
       ir-ctl [OPTION]... --record [save to file]


       ir-ctl  is  a tool that allows one to list the features of a lirc device, set its options,
       record raw IR, send raw IR or send complete IR scancodes.

       Note: You need to have read or write permissions on the /dev/lirc device  for  options  to


       -d, --device=DEV
              lirc device to control, /dev/lirc0 by default

       -f, --features
              List the features of the lirc device.

       -r, --record=[FILE]
              Record  IR  and  print to standard output if no file is specified, else save to the

       -s, --send=FILE
              Send IR in text file. It must be in the format described below. If this  option  is
              specified multiple times, send all files in order with 125ms delay between them.

       -S, --scancode=PROTOCOL:SCANCODE
              Send  the  IR  scancode  in  the  protocol  specified. The protocol must one of the
              protocols listed below, followed by a semicolon and the scancode number.

       -1, --oneshot
              When recording, stop recording after the first  message,  i.e.  after  a  space  or
              timeout of more than 19ms is received.

       -w, --wideband
              Use  the  wideband  receiver  if  available  on the hardware. This is also known as
              learning mode. The measurements should be more precise and  any  carrier  frequency
              should be accepted.

       -n, --no-wideband
              Switches  back  to  the  normal,  narrowband  receiver if the wideband receiver was

       -R, --carrier-range=RANGE
              Set the accepted carrier range for the narrowband receiver. It should be  specified
              in the form 30000-50000.

       -m, --measure-carrier
              If the hardware supports it, report what the carrier frequency is on recording. You
              will get the keyword carrier  followed  by  the  frequency.   This  might  use  the
              wideband receiver although this is hardware specific.

       -M, --no-measure-carrier
              Disable reporting of the carrier frequency. This should make it possible to use the
              narrowband receiver. This is the default.

       -p, --timeout-reports
              When the IR receiver times out due to inactivity, a timeout  message  is  reported.
              When recording you will get the keyword timeout followed by the length of time that
              no IR was detected for.

       -P, --no-timeout-reports
              When the IR receiver times out due to inactivity, do not report this.  This is  the

       -t, --timeout=TIMEOUT
              Set  the  length  of  a  space  at  which  the  recorder  goes  idle,  specified in

       -c, --carrier=CARRIER
              Sets the send carrier frequency.

       -D, --duty-cycle=DUTY
              Set the duty cycle for sending in percent if the hardware support it.

       -e, --emitters=EMITTERS
              Comma separated list of emitters to use for sending. The first emitter is number 1.
              Some devices only support enabling one emitter (the winbond-cir driver).

       -?, --help
              Prints the help message

              Give a short usage message

       -v, --verbose
              Verbose output; this prints the IR before sending.

       -V, --version
              print the v4l2-utils version

   Format of pulse and space file
       When  sending IR, the format of the file should be as follows. A comment start with #. The
       carrier frequency can be specified as:

            carrier 38000

       The file should contain alternating lines with pulse and  space,  followed  by  length  in
       microseconds. The following is a rc-5 encoded message:

            carrier 36000
            pulse 940
            space 860
            pulse 1790
            space 1750
            pulse 880
            space 880
            pulse 900
            space 890
            pulse 870
            space 900
            pulse 1750
            space 900
            pulse 890
            space 910
            pulse 840
            space 920
            pulse 870
            space 920
            pulse 840
            space 920
            pulse 870
            space 1810
            pulse 840

       Rather than specifying the raw IR, you can also specify the scancode and protocol you want
       to send. This will also automatically set the correct carrier. The above  can  be  written

            scancode rc5:0x1e01

       Do not specify scancodes with different protocols in one file, as the carrier might differ
       and the transmitter cannot send this. Multiple scancodes can be specified in one file  but
       ensure  that  the rules for the protocol are met by inserting an appropriate space between
       them. Also, there are limits to what lirc devices can send in one go.

   Supported Protocols
       A scancode with protocol can be specified on the command line or in the  pulse  and  space
       file.  The  following  protocols are supported: rc5, rc5x_20, rc5_sz, jvc, sony12, sony15,
       sony20, nec, necx, nec32, sanyo, rc6_0, rc6_6a_20, rc6_6a_24, rc6_6a_32,  rc6_mce,  sharp.
       If  the  scancode starts with 0x it will be interpreted as a hexidecimal number, and if it
       starts with 0 it will be interpreted as an octal number.

   Wideband and narrowband receiver
       Most IR receivers have a narrowband and wideband receiver.  The  narrowband  receiver  can
       receive  over  longer  distances  (usually  around  10 metres without interference) and is
       limited to certain carrier frequencies.

       The wideband receiver is for higher precision measurements and when the carrier  frequency
       is unknown; however it only works over very short distances (about 5 centimetres). This is
       also known as learning mode.

       For most drivers, enabling carrier reports using -m also enables the wideband receiver.

   Global state
       All the options which can be set for lirc devices  are  maintained  until  the  device  is
       powered down or a new option is set.


       On success, it returns 0. Otherwise, it will return the error code.


       To list all capabilities of /dev/lirc2:
            ir-ctl -f -d /dev/lirc2

       To show the IR of the first button press on a remote in learning mode:
            ir-ctl -r -m -w

       Note that ir-ctl -rmw would record to a file called mw.

       To restore the normal (longer distance) receiver:
            ir-ctl -n -M

       To send the pulse and space file play on emitter 3:
            ir-ctl -e 3 --send=play

       To send the rc-5 hauppuage '1' scancode:
            ir-ctl -S rc5:0x1e01

       To restore the IR receiver on /dev/lirc2 to the default state:
            ir-ctl -PMn --timeout 125000 --device=/dev/lirc2


       Report bugs to Linux Media Mailing List <>


       Copyright (c) 2016 by Sean Young.

       License GPLv2: GNU GPL version 2 <>.
       This  is free software: you are free to change and redistribute it.  There is NO WARRANTY,
       to the extent permitted by law.