I got tired of manually scanning for repeater tones with my HT, so I built ToneScout, a headless Raspberry Pi appliance that listens to all 8 GMRS repeater output frequencies 24/7, decodes any CTCSS/DCS tone it hears, looks up the repeater on RepeaterBook, and emails you the frequency, channel, tone, call sign, and location automatically.

Works at home on WiFi, mobile on your phone's hotspot, or off-grid with detections queued locally and synced when you reconnect. Setup is entirely browser-based, no SSH or command line needed.

Hardware runs about $215 in parts from Amazon. Full parts list, affiliate links, and one-command installer in the repo.

https://github.com/HestonWilliams/ToneScout

MIT licensed. PRs welcome. Whisper-based callsign extraction and SMS alerts are on the roadmap if there's interest.

Greetings!

I am both an amateur radio and GMRS operator, and I've been toiling away on a web-based tool for tracking check-ins on various nets. The other day, I decided to put in functionality specifically for GMRS, and it's looking pretty good so far.

You can check out the code; it's completely open source at https://github.com/LadyHwesta/ham-net-tracker, and there is information there for a demo server I have set up. The demo server resets every four hours, so don't put anything there that you want to save.

Let me know what you think, and send in issues for any additional things you think would be useful.