If you want you can just use my script it does the complete setup including creating a service file so it automatically starts. (HOWTO: Airspy mini and Airspy R2: Piaware / dump1090-fa configuration)
(autostart per rc.local you would need to remove if you have it set up like that, it would clash with the service)
But setting it up manually is not a problem either:
airspy network options:
-c localhost:30104:beast
dump1090-fa: default config
RECEIVER_OPTIONS="--net-only"
DECODER_OPTIONS="--max-range 360"
NET_OPTIONS="--net --net-heartbeat 60 --net-ro-size 1000 --net-ro-interval 1 --net-ri-port 0 --net-ro-port 30002 --net-sbs-port 30003 --net-bi-port 30004,30104 --net-bo-port 30005"
JSON_OPTIONS="--json-location-accuracy 1"
important is those two options:
--net-bi-port 30004,30104 --net-bo-port 30005
And piaware then works with default settings, so no need to change anything, but if you have already put something in, then you can go back to the defaults with these:
sudo piaware-config receiver-type rtlsdr
sudo piaware-config receiver-host localhost
sudo piaware-config receiver-port 30005
sudo systemctl restart piaware dump1090-fa
Also check if you have version 1.37
airspy_adsb -h
(that might be different depending on where the program is located)