I am using copter 3.4.6 on my pixhawk wtih px4 flow. I bypassed the px4 flow sonar to the 6V adc of pixhawk. Not the drone is at very good Alt Hold mode.
But for the loiter mode, when I tried switching from RC, it is beeping twice and the mode is not changing and its being in previous mode only. Its not showing any error messagess in the logs.
My params are
EK2_GPS_USE =3
GPS_HDOP_GOOD=9999
EK2_ALT_SOURCE=1
FLOW_ENABLE=1