GPS connect to PIXHAWK
Connect to APM
6pin for GPS connect port
：
Pay attention to the installation direction, the GPS direction is consistent
with the flight control direction;
4pin for I2C connect port
：
Take off the internal compass of APM. Otherwise, there is no data even if the
GPS compass is plugged in.
Compass calibrate (calibrate with APM mission planner)
Compass calibrate
（
Using version 1.3.39 of Mission planner
）
, please choose Pixhawk/PX4 if you use
with PIXHWAK.
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