SDR is great. I'm using an RTL-SDR dongle together with the rtlamr software to read my gas meter. It provides measurements about every 30 seconds, and my gas company doesn't give any real-time data. Quite handy.
(and I run an adsb receiver, which incidentally provides free access to FlightAware and other services if you share with them.)
(and I run an adsb receiver, which incidentally provides free access to FlightAware and other services if you share with them.)