PX4 Flow calibration problem

ArduCopter Copter 3.4
1

Hi all,

I am trying to calibrate my px4 flow sensor using official documentation from the ardupilot website.

  1. I am not able to flash the firmware using APM Planner 2.0 (Linux version) to the px4flow. After downloading the firmware from the link, I am not able to flash that into px4flow.

  2. After flashing the same firmware using Q Ground Control, I am not able to see the camera feed both of them (QGC,APM Planner).

Please help me with this .

Thank you