CAN Termination Resistance Software Toggle
For future versions of Holybro DroneCAN devices, a software toggle allows users to enable and disable the termination resistance (120Ω).
Currently supported model and serial number
H-Flow All version
DLVR Airspeed Sensor 19012001***; 19013001***; 19014001*** and later
PM08-CAN 15028001***; 15029001***; 15030001*** and later
DroneCAN M9N 12032002***
DroneCAN H-RTK F9P Helical 12037003***
DroneCAN RM3100 18088002***; 18089002***
H-RTK ZED-F9P Rover 12059002***
Ardupilot (Mission Planner) setup guide
Connect the DroneCAN peripheral to the CAN port on the flight controller
Find the CAN_TERMINATE command and you will see the value defaults to 0. Set CAN_TERMINATE to 1 to enable 120Ω termination resistance, and 0 to disable it
Click Write Params to save the configuration
PX4 (QGroundControl) setup guide
Make sure the parameters are set accordingly so the firmware can detect the CAN device
Navigate to Vehicle Setup->Parameters and click Standard to hide flight controller parameters:
If your CAN device is successfully detected, you will see a section labeled Components with numbers following it:
Expand the Component section, navigate to the CAN tab, and change the CAN_TERMINATE value to enable or disable termination resistance (120Ω). Set to 1 to enable and 0 to disable.
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