Encode pocsag messages to dump to a file. This project is designed to make it easier to understand how pocsag works, with a heavily-commented implementation.
Takes input as a series of lines, one line per message.
Message format is as follows:
address:message
where address is an integer, and message is contents to be encoded.
Adds a random delay to the output feed of 1 to 10 seconds by default. This is configurable in pocsag.c near the bottom of the file by the MIN_DELAY and MAX_DELAY defines.
pocsag reads from stdin and writes signed 16 bit little-endian samples to stdout.
# encode two messages, and verify multimon can decode them
printf '1:hello\n9:world' | pocsag | multimon-ng -c -a POCSAG512 -q -
# encode a message to a file (raw, 22050Hz PCM S16LE)
printf '11:good evening' > transmission.rawpocsag doesn't rely on any dependencies but the C standard libraries. Use
make to compile, or run your own C compiler manually. Feel free to
sudo make install if you want.
This section is about connecting the transmitter to send messages coming form the dapnet network.
to make this work, you will need:
pythonandRPi.GPIOpackageffmpegmpv
edit the global variables CALLSIGN and PASSWORD according to your DAPNET transmitter credentials and run python dapnet_messages.py
Soon(tm)