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After the harness is made, be sure to use DMM to check continuity on all pins!
Example
We use TinyCAD to draw the harness schematic, see examples below. Other software is also ok as long as the schematic is clear and formatting is consistent.
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The double X on the CAN wire pair means the CAN_H and CAN_L wires should be twisted together.
Color Codes
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Pixhawk Standards:
https://docs.px4.io/main/en/assembly/cable_wiring.html
https://docs.holybro.com/autopilot/pixhawk-baseboards/pixhawk-baseboard-v1-ports
https://docs.px4.io/main/en/assembly/quick_start_pixhawk6x.html