I'm very new to this stuff, so please excuse the dumb sounding terminology.
I'm trying to capture the data from my elster smart hydro meter. How can I find its frequency (I know its between 902 and 928 MHz and I think there is frequency hopping)? I have an rtlsdr dongle (2 MHz sample rate) and gnuradio and a raspberrypi.
One idea I had was to listen for an hour on bands:
Listen on 902 for an hour Listen on 904 for an hour ... Listen on 928 for an hour
Then, I would have to record only when a "blip" in frequency or amplitude happens. This way, I would have a few blips and I could then try to analyze them.
Does this sound sensible?
Perhaps there is a device that helps with this?