Pixhawk 4 only has two CAN ports I think?
Yes, but Holybro, who designed and built the Pixhawk 4, didn’t wire the CAN3 ports of the chip to a port on the Pixhawk 4. Can’t you use a CAN node instead on ports CAN 1 or 2?
Yes,get it.But this situation is basic on all CAN devices are the same protocols and use a CAN node to distinguish.How about 3 different protocols ?
The ardupilot supports CAN3 undoubtedly,but I don’t know how to modify in software correctly
I fix it ,now it works perfectly