DroneNet not enumerating on CAN — PPP stuck at "reconnecting"

General
1
  • Matek H743-WING V3, custom ArduPlane 4.7.0 (PPP enabled)
  • DroneNet BB-DRN-C-1
  • USART → FC UART7/SERIAL1 (TX, RX, RTS, CTS, GND)
  • CAN → FC CAN (CAN_H, CAN_L, GND)
  • Powered via 5V Input port (5.0V measured)

Current FC parameters:

  • SERIAL1_PROTOCOL=48, SERIAL1_BAUD=12500000
  • CAN_P1_DRIVER=1, CAN_D1_PROTOCOL=1, CAN_P1_BITRATE=1000000
  • NET_ENABLE=1, NET_OPTIONS=1

Problem:
On the DroneCAN screen I see only two nodes: ID 127 (Mission Planner) and ID 10 (name “?”, empty HW/SW version, OPERATIONAL). I was told ID 10 is likely the flight controller itself — meaning the DroneNet may not be appearing on the bus at all. PPP stays stuck at “reconnecting” and no DroneNet parameters can be read.

Questions:

  1. What is the correct wiring and termination to connect the DroneNet to the FC over CAN?
  2. Which exact FC-side parameters must be set for the FC to see and talk to the DroneNet over CAN? Are the ones I listed above correct/complete?
  3. What node ID should a working DroneNet appear as, so I can confirm it has enumerated?
  4. If it’s not enumerating, is this a wiring/termination issue or does the DroneNet firmware need reflashing first?