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CAN bus

Connect two boards like the following:

Board A   Board B

 CAN_H --- CAN_H
 CAN_L --- CAN_L
  GND ----- GND

Set up the boards by running the following on each of them:

ip link set can0 up type can bitrate 125000

Then: On board A:

candump can0

On board B:

cansend can0 500#1E.10.10