There was a conflict between Bluetooth and ttyAMA0
https://community.emlid.com/t/can-i-use-raspberry-pi-3s-built-in-bluetooth-with-navio-2/3287
There was a conflict between Bluetooth and ttyAMA0
https://community.emlid.com/t/can-i-use-raspberry-pi-3s-built-in-bluetooth-with-navio-2/3287