Join us for a quick 'how to' demo. Learn how to use an RTL-SDR device to pick up data from radio waves using open source software. Find weather reports, decode radio packet data, scan frequency ranges for local activity and much more! You'll be surprised at what's out there!

Meetup link: https://www.meetup.com/Open-Source-Glasgow/events/277171091/

As always, join us in Matrix room #opensource:glasgow.social if you have any questions or want me to cover something specific.

• GQRX
• multimon-ng

• Tune the gqrx application to the desired frequency, then select UDP to broadcast the raw data. Once that's done we'll use netcat to listen to that port, and sox to convert it to audio format, then multimon-ng to process the digital data into something alphanumeric:

nc -l -u -p 7355 |
    sox -t raw -esigned-integer -b 16 -r 48000 - -esigned-integer -b 16 -r 22050 -t raw - |
    multimon-ng --timestamp -t raw -a POCSAG512 -a POCSAG1200 -a POCSAG2400  -f alpha -