What file do you edit to set the gain? I tried changing /etc/default/dump1090-fa but it reverts back to gain of -10 when restart dump1090.
Edit file /boot/piaware-config.txt
Reboot pi after editing.
Or
sudo piaware-config rtlsdr-gain ?? Where ?? Is the gain needed
Then restart dump1090
See below for more info
flightaware.com/adsb/piaware/adv … figuration