I want to feed FA, i have a RPI3, but dont have a dongle, is possible feed PiAware without dongle?, how to configure it?
you need a Dongle to pickup the transmission of ADSB signals - you also need an Antenna.
flightaware.com/adsb/piaware/build
if you live in a remote area that is not in use much you could also apply for a free receiver
flightaware.com/adsb/flightfeeder/
you will most likely however be declined the request.