Re: [Discuss-gnuradio] Saving data to file periodically

[Marcus D. Leech]

On 04/25/2019 05:46 PM, Ali Dormiani wrote:
> Hello everyone,
>
>
> I have a situation where I want to save data to a binary file every 15 
> minutes or so.
>
> We want to keep the same flow-graph running indefinitely to prevent 
> daughter-boards from being re-initialized. Thus, the obvious solution 
> of writing a script that runs and stops the flow graph is a no go.
>
>
> Is there an easy way to save a few seconds of streamed data to file 
> periodically? I looked through some old threads that suggest custom 
> blocks or using the c++ api to send stream commands or something. I'm 
> hoping there is some "easy" way to do this within gnuradio-companion.
>
> Thank you all for your time,
>
> Ali
Use a file sink that writes to /dev/null.    When you want to actually 
save data, change the filename to the file you want to save data in to.
  You can even control from an external program using control ports or 
the xmlrpc blocks that are built in to GRC.