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GP-SDR user guide

Current coverage: 1.5.0-rc9 release candidate, plus the 1.4.1 baseline. Use What’s New to compare versions. The release candidate is not a final 1.5 release.

This wiki was checked against the published source through 1.5.0-rc9 on September 2, 2026. GP-SDR brings tuning, scanning, P25 trunk following, optional digital decoders, multi-receiver mapping, recordings, and offline transcription into one console. It also includes a guarded, local-only HackRF WAV transmit workspace; receive workflows do not transmit.

Download GP-SDR and release candidates · What changed and how to use it · Troubleshooting

First successful session

1. Install and complete first run.
2. Connect your radio and check its drivers.
3. Tune a known signal and hear clear audio.
4. Create or import a profile and start scanning.
5. Review recordings and search the timeline.

Choose a task

I want to…	Guide
Listen to one frequency or use the spectrum/waterfall	Tuner and Live
Scan a channel bank or import CHIRP files	Profiles and Mixer
Follow a P25 system or decode DMR, sensors, aircraft, paging, or AIS	P25 and Decoders
Find and identify activity across a band	Mapper: Map, Discovery, and Identify
Run separate jobs on several radios	Multiple Receivers
Compare receivers or antennas	Receiver and Antenna Lab
Find an earlier call, transcribe it, or limit capture storage	Activity, Recordings, and Storage
Import local databases, sync ranges, or queue results to Sheets	Data and Integrations
Install optional decoders or whisper.cpp	Optional Components
Operate from a phone or another computer	Remote and Settings
Set up an always-on Linux or Windows host	Server Setup
Prepare HackRF audio-file transmission	Transmit
Monitor a whole fitting channel bank with independent audio	Band Monitor
Collect now, analyze later, or alternate timed phases	Analyze and Schedule
Configure a local model and confirmed examples	Local Intelligence
Try standalone Android HackRF USB reception	Android Preview

Know what a result proves

A spectrum peak proves RF energy. A decoder candidate suggests which tool to try. Valid frames provide protocol evidence; intelligible unencrypted audio provides voice evidence. An automatic label or transcript can be wrong. Encrypted traffic is identified and skipped, never decrypted.

Optional decoders need their executables and dependencies installed. Phone/tablet browser access operates the receiver attached to the host computer. The separate Android preview has experimental HackRF USB support and is not included in the desktop release downloads. See What’s New for release-specific evidence and remaining limits.

The source repository includes a matching Wiki/ copy for maintenance. Source and credits.