Pixhawk weather balloon flight 90.000 feets

hello we are from a school and we are going to use a weather balloon and attach the Pixhawk to send data to our ground station via 2.4 video and osd we have not controls or motors below is the setup i have , how can we arm the pixhauwk so we can get the data ? could you please help ?

Hi, looks like very interesting project.

Did you mannage to complete the flight?

You should be able to arm pixhawk through the QGC or Mission planner. I know for sure that in QGC you can do it.