Gqrx SDR for the Raspberry Pi

Gqrx for the Raspberry Pi

Gqrx SDR is available as binary package for the Raspberry Pi 3 and other similar ARM platforms:

Drivers included: Rtlsdr, Airspy, HackRF, RFSpace, Funcube Dongle, Red Pitaya and SoapySDR (no plugins).

Running Gqrx on the Raspberry Pi is still very experimental. I strongly recommend that you start with a fresh installation of Raspbian on the MicroSD card. Once you have seen it work you can experiment with different setups and let us know how it works.

It has been reported that using the HDMI audio results in unstable, stuttering audio output. We recommend using the headset jack instead, please see here about switching.

Installation instructions

See the included readme.txt

Device support

Running Gqrx on the Raspberry Pi is still experimental and a compromise at best. You should not expect the same performance as on a high end PC.

The table below should give you an idea of what kind of performance you can expect using the default settings. Note that these tests were run using the v2.6 packages and may not be accurate for v2.9.

Device Raspberry Pi 2 Raspberry Pi 3
Rtlsdr Works up to 1.44 Msps Works up to 2.4 Msps
Airspy R2 Doesn’t work Use 2.5 Msps and input decimation ≥ 4
Airspy Mini Doesn’t work Use 3 Msps and input decimation ≥ 8
HackRF Doesn’t work (USB power?) Works at  2 Msps
RFSpace SDR-IQ Doesn’t work well (FTDI?) Works up to 111.111 ksps
RFSpace Cloud-IQ Works up to 256 ksps Works up to 614 ksps
RFSpace NetSDR Not tested (need hardware)
Funcube Dongle Pro Works
Funcube Dongle Pro+ Works but sometimes with crackling audio
Red Pitaya Not tested (need time)

In most cases you can reduce the CPU load further by reducing the window size, sample rate, FFT rate and FFT size (try 2048 at 10-15 Hz).

If you are only interested in the FFT, set Mode to “Demod Off”. This will greatly reduce the CPU load.

Let us know how it works for you!