Supported Firmware
Pixhawk 6X Pro is shipped with PX4 FMUv6X Firmware, but it is also supported in Ardupilot.
Pixhawk 6X Pro is supported on Master/Main or PX4 1.14.3 release and later.
Pixhawk 6X Pro is supported in Ardupilot 4.5.0 stable release and later. Ardupilot firmware can be flash via Mission Planner or QGroundControl.
It can also be downloaded here: https://firmware.ardupilot.org/
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