Today (10.2.2019) the firmware for the PX4 is a custom build based on the 1.8.2 release. The firmware is maintained in the github repository:

SearchWing PX4 Firmware

This is a fork from the PX4 Firmware maintained by PX4 team. I have contributed two commits to the firmware which landed in upstream

• X-UAV Mini Talon airframe
• A fix for the airframe

The above changes to the upstream firmware are after the 1.8.2 release. I cherry-picked the above changes and applied them to the stable (1.8.2) branch. All changes for searchwing are maintained in the

• searchwing18 branch

which branched off the stable branch from upstream. The changes for the reduced Telemetry2 activity are missing.

The build command for the 1.8.2 based firmeware is

make px4fmu-v4_default

Note the missing “_” compared to the official build description. You can find out the possible build targets via

make help
make list_config_targets

The servo connection to the PixRacer is according to the X-UAV Mini Talon description.

The firmware is installed on the PixRacer via the QGroundControl Software. You have to select the “Custom Firmware File” that you find in the folder “Firmware/build”. The name of the firmware file is “px4fmu-v4_default.px4”.

• Based on upstream 1.8.2
• Added X-UAV Mini Talon Airframe
• searchwing-1.8.2-1.px4.zip

• Added Björns minimal telemetry patch for the Raspberry Pi Camera Trigger from the autopilot
• searchwing-1.8.2-2.px4.zip