Hwy I am trying to connect raspberry pi with pixhawk and I have configured all mavproxy ssh but when I am trying to run a python script for arming.
But the arming is failing and it is saying that the Ahrs waiting for home and ekf vibe Gps: 3d fix.
You are doing it indoors. GPS signal quality is not good enough. Test it again outside with clear sky view
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Check on status sat number, once you have to had >=6 to arm.
Yeah 
It got solved automatically when I tried the same on my terrace. THANKYOU BTW.
Oh okay I already made min sat>=8 in mission planner but trying outside in open sky really helped alot.
same problem for me when tried outside also
wait longer and with open sky!