Historia

Alberto Morato aaefebc8ee Add support to sendook to read bit and duration from file		2021-08-01 15:59:55 +02:00
..
IQ_sendook.png	add command line tools sendook	2020-09-08 18:33:12 +02:00
README.md	add command line tools sendook	2020-09-08 18:33:12 +02:00
optparse.c	Move OOK parse to ook project	2020-11-02 13:01:12 +00:00
optparse.h	Move OOK parse to ook project	2020-11-02 13:01:12 +00:00
sendook.cpp	Add support to sendook to read bit and duration from file	2021-08-01 15:59:55 +02:00

README.md

SendOOK

sendook allow you to send On Off Keying packend with librpitx.

Usage

Run the program in SUDO, even if using the "dry run" switch. It is because of the DMA things of librpitx.

usage : sendook [options] "binary code"
Options:
-h : this help
-v : verbose (-vv : more verbose)
-d : dry run : do not send anything
-f freq : frequency in Hz (default : 433.92MHz)
-0 nb : duration in microsecond of 0 bit (by default : 500us). Use integer only.
-1 nb : duration in microsecond of 1 bit (by default : 250us)
-r nb : repeat nb times the message (default : 3)
-p nb : pause between each message (default : 1000us=1ms)

"binary code":
  a serie of 0 or 1 char (space allowed and ignored)

Examples:
  sendook -f 868.3M -0 500 -1 250 -r 3 1010101001010101
    send 0xaa55 three times (with the default pause of 1ms) on 868.3MHz. A 0 is a gap of 500us, a 1 is a pulse of 250us

The program return 0 if message send.

Known limitation

a gap or a pulse can not be shorter than 10us (options -0 or -1).
the pulse is not really a pulse : it is not modulated (you cant have a pulse of 7Khz for ex.)
but the signal is not really a square signal too, because librpitx, for an unkown reason, modulate the generated signal globally : -- for example, the command sendook -f 868.3M -0 500 -1 250 -r 3 101010 should generate :

| ....    ....    ....
| :  :    :  :    :  :
+-+--+----+--+----+--+----------------------->

-- but if record the I/Q of the signal, you will see :