Re: Watchdog for GNU Radio

[Marcus Müller]

I'd presume there's something going wrong in the communication between
your PC  and the dongle; maybe a USB packet goes missing, maybe the
dongle reboots for some reason, like unstable power supply. It's
probably wisest to fix that instead of building a watchdog around it.

If you really want to build a watchdog: Spawn a thread, e.g. by
embedding a python module in the flow graph, that periodically checks
whether the nitems_written(0) of your osmocom_source has increased since
last call, and otherwise shuts down the flow graph.

Cheers,
Marcus

On 07.11.20 13:40, Kopa Rebu wrote:
> Hi all,
>  
> I use GNU Radio with a rtl-sdr dongle, which I tune to some frequency
> and then leave unattended for some hours. Sometimes, the reception just
> stops: in my flowgraph, I have some display sinks showing the waveform,
> and it remains still, like frozen. The GNU Radio interface is not
> frozen, though: I can click on the buttons, only that they won't make
> anything useful because the reception is not working anymore.
> When this happens, I close the flowgraph and launch it again, without
> having to unplug the dongle, and it starts working.
>  
> As this can happen and go unnoticed for hours, I was thinking if there
> would be a way to automatically detect this from somewhere, so the graph
> can be restarted. Something like a watchdog.
>  
> I use Linux. Any ideas?
>  
> Thanks in advance