when i try to initiate my connection to my apm planner or tower the connection connects and terminates within 5 secs. And also when i try to run the AccelGyroMag value is always 0.
Init APM:Copter V3.3 (340970fc)
Free RAM: 4096
FW Ver: 120
load_all took 56us
0 0 0 � Q}�MPU9250: unexpected WHOAMI 0x0
AK8963: Could not configure bus for AK8963
No Compass backends available
COMPASS INIT ERROR
�3�Calibrating barometer_R� Q� No INS backends available
�3�barometer calibration completeo��3�GROUND STARTt
Help me solve this please