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That was interesting. Not only was it fixable, but your FlightRadar ADS-B receiver seems to be doing a much better job of receiving ADS-B frames without errors than my old RTL-SDR is. When I added unit test code to verify both packet formats would be accepted, I received no checksum errors on the packets you sent me (except where the CRC was overloaded to carry an identifier in old Mode S packets), but I had a ton of checksum errors coming out of my RTL-SDR. Probably lousy reception here due to terrain (like I can stand in my backyard and look _down_ at the antennas on my house roof, the slope is so steep) and no nearby aircraft because the wind is currently blowing the wrong way for the instrument approach that goes over my house (the few non-erroneous packets I received showed aircraft at 30600 feet altitude when the airport is at 36 feet elevation MSL, so they are probably staying above the Class B airspace).
Anyway, the plugin fix will be released with the next build of YAAC. But if you want to try it now, I've attached the updated plugin file for your convenience. It's in a ZIP file so email filters won't get annoyed; you'll have to unzip it to get the JAR file out to put in your plugins directory. Andrew, KA2DDO ________________________________________ From: [email protected] <[email protected]> on behalf of Andrew P. via groups.io <andrewemt@...> Sent: Friday, April 4, 2025 10:00 PM To: [email protected] Subject: Re: [yaac-users] ADS-B - FlightRadar24 (FR24) It was more than a leading symbol, but it was worth it to re-review the ADS-B plugin code, which I haven't looked at for a few years. ________________________________________ From: [email protected] <[email protected]> on behalf of Jamie H via groups.io <wa7jh@...> Sent: Friday, April 4, 2025 5:21 PM To: [email protected] Subject: Re: [yaac-users] ADS-B - FlightRadar24 (FR24) Andrew, Before you go through that work, are the packets correct other than the leading symbol? I have been playing around with the different ADS-B receivers and found some play well together and others do not. FR24 provides it's own build. RF24 has a very clean UI and feeder compensation plan. Not to mention a cool support crew. The reason I like them. So cool if you want to support their feed, but please don't do that work if the work is more than the leading symbol. |
