[Discuss-gnuradio] GNUradio and external electronic relay switching?

[Bob Mattaliano]

Hi,

Pretty new to GNUradio, GRC and Linux.  Does anyone have experience with 
or know if possible to create a flow graph or block to switch a USB 
relay (as in the kind used for home automation)?

 What I am interested in is a block or flowgraph which examines output 
which also goes to the the monitor window.  If a specific string is not 
observed, a signal will be sent to switch the relay for a defined 
period.  The goal is some sort of automated antenna polarity switching 
depending on what is (or is not) received.

Suggestions welcome.

Thanks,

Bob
N6RFM