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Re: GNU Radio on Raspberry Pi 4?

From: Kristoff
Subject: Re: GNU Radio on Raspberry Pi 4?
Date: Thu, 17 Dec 2020 10:27:28 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.10.0

HI all,

I also have a RPi4 (*).
Some follow-up question.

What OS would be the best for this?
Would running 64 bit make a difference?

I don't know to what degree this is related, but I did a test running WebGL (**) on that pi, and I got about 1/3 of the frames per second on my RPi4 compared to my laptop (which only has a UHD Graphics 630 Mobile, so not the  best or latest neither) Is the GPU in the Pi4 good enough to run many GUI elements in GNU Radio at the same time?


(*) RPi4B 8 GB, 120 SSD

(*) https://webglsamples.org/

On 16/12/2020 11:10 p.m., Dan Romanchik KB6NU wrote:

Has anyone successfully run GNU Radio on a Pi 4? I recently purchased an RTL-SDR dongle and thought it would be fun to experiment a little with GNU Radio and learn something about SDR.

A couple of days ago, I fired up GNU Radio, and after having some trouble figuring out how to get the audio sink to talk to the Pi, I downloaded VE6EY's FM receiver flow graph. The flow graph runs, but the Pi 4 just doesn't seem to have enough horsepower to run it in real time. The audio is slow and distorted.

Thinking that it might be the WX widgets slowing down the program, I first deleted the FFT display widgets, then converted the WX slider controls to QT range controls. Neither had any effect on how well the flow graph ran.

GQRX and CubicSDDR seem to work just fine. At least with both of them, I'm able to receive FM broadcast and NOAA weather station. But, maybe the PI4 just doesn't have enough horsepower to run GNU Radio? If so, that's kind of disappointing.

73! <—ham radio lingo for “best regards"

*Dan KB6NU*
CW Geek, Ham Radio Instructor
Author of the "No Nonsense" amateur radio license study guides
Read my ham radio blog at http://www.kb6nu.com

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