In plane finder data view I missing the call-signs, when I look on the PI the listing of dump1090 I can see the whole list with call-signs.
What could be the problem?
the command line for dump1090
./dump1090 --interactive --net --net-beast --mlat --quiet --ppm 8 --gain 48
When receiving the callsign values from Dump1090 we make sure we can see at least the same callsign 5 times before populating the value as Dump1090 can be a little over aggressive in decoding callsigns (and quite often gets it wrong).
If they are never coming in it suggests you possibly have a poor antenna sighting as testing around the world shows that it comes in around 5 seconds after seeing an aircraft.