Servos are not moving.

So when I am trying to calibrate the motors, I am getting 0 for everything:

Calibrate MPU? (Y/n)

0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15,

0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

c0 0

I've noticed that the servos do not move at all. I am using the nono tech 2.0 2000mAh 20c High discharge turnigy li-po battery 7.4V receiver pack