Hello sir.
How are you?
I am very interested in your task.
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about 2 years ago. I made a quad-copter that is using Pixhawk2, RTK GPS, 14-Chanel Futaba(I forgot the name), Ultrasonic sensor for measure the distance, 12000mA Battery(Tatu), 60A ESC, Motor(I forgot the name). and so on.
I know how to calibrate the compass and accelerator for the Pixhawk.
I used Mission Planner for the ground station software.
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Now I am doing a Raspberry PI project.
My Raspberry PI must detect a person's face and send a person's face position data to the servo.
So the robotic will turn head to look the person's face.
If you want I can show you this project.
I want to discuss more detail with you.
Looking forward to your message.
Thank you.