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Set up pi star on a raspberry pi zero, and immediately ordered a zeo 2 w. Single core is not enough.
During the testing, I got several signals from Chinese stations, but no voice. Some are less than 1s long, and some are multiple seconds. I thought it's my fault on my end, so I spend a lot of time debugging. Then find out they just pushed ptt bottom for testing.
When I test my setup using parrot mode, I always speak out something like "test test 123", so others won't be confused. Especially today is my first time setting up this kind of stuff. Wasted some time, but still feel interesting (and tired, have to pack up my luggage).
I also have a 4b, but I don't have time to set up the hardware. The mmdvm board for zero is kinda small. The pcb trace is antenna. Another model for full size raspberry pi has a dedicated sma connector for external antenna, I think that will be better?
After I move to kunming I need to do some tests to ensure I'm not breaking the law.