So at the moment it's working (at least in the spare room!), and I'm picking up ADS-B traffic. In SkyDemon, when you touch the symbol for another aircraft, you get an "Information- Aircraft" choice. Touching that, it shows you that aircraft's altitude, track & groundspeed. It DID show it's ICAO hex ID, but not this evening. Any ideas why? The only thing that's different is that I've installed the radio module - is that it?
Not that this function is going to be practical in flight, but it's nice to know why things work the way they do.