# CAN bus 2, first flight: airspeed (node 21, software terminator, nose end) -> charge node sense
# board (node 20, J1 in / J2 out) -> "CAN2" joiner at the FC with a 60 mm stub to CAN2 and the
# terminator plug in its third header. Range node (22) and servo nodes (28, 29) are later slots.
# Airspeed module in the Fuselage Front's port lobe (th-avionics decision, th-main 91af504, 2026-09-28):
# no cone crossing. Joiner on the floor ahead of the battery bay (th-blender b250fba): J1 a 133 mm stub from the module
# (software terminator OFF), J2 the terminator plug, J3 the trunk to sense board J1 (385 mm with the P50B,
# 200 with the Tattu). th-main 6c3e93b.
# All bus leads are crimped (SSHL-002T-P0.2, 28 AWG, four colours); the kit's pre-crimped GH leads are 150 mm.
# The bus end is terminated at the joiner, not at the module, so a loose module plug loses only the
# airspeed, never the termination (th-avionics, cart H11).
# Bus 2 carries VCC: the charge node's MCU and transceiver run from bus 5 V (through its load switch).
# Source: th-main, agent-threads/harness/20260928T051244Z-th-main-can-bus-harness-data.md (fadaa43).
metadata:
  title: TerraHawk CAN bus 2, first flight, v1
  notes: GH-4 pinout 1 VCC (5 V from the FC), 2 CAN_H, 3 CAN_L, 4 GND.

connectors:
  AIRSPEED:
    type: Airspeed module, node 21, Fuselage Front port lobe
    subtype: GH-4, software terminator OFF (stub; th-avionics 2026-09-28)
    pinlabels: [VCC, CAN_H, CAN_L, GND]
  JOIN_FWD:
    type: Joiner beside the airspeed module (Fuselage Front, port lobe)
    subtype: 3 x GH-4, pins bussed (boards/can-joiner rev A); floor ahead of the battery bay, X -36 to -7, J1 at the X -36 end
    pinlabels: [A_VCC, A_CAN_H, A_CAN_L, A_GND, B_VCC, B_CAN_H, B_CAN_L, B_GND, C_VCC, C_CAN_H, C_CAN_L, C_GND]
    shorts: {VCC: [1, 5, 9], CAN_H: [2, 6, 10], CAN_L: [3, 7, 11], GND: [4, 8, 12]}
  CHARGE_J1:
    type: Charge node sense board J1 (CAN IN), node 20
    pinlabels: [VCC, CAN_H, CAN_L, GND]
  CHARGE_J2:
    type: Charge node sense board J2 (CAN OUT)
    subtype: J1 and J2 bussed on the board, JP1 open
    pinlabels: [VCC, CAN_H, CAN_L, GND]
  JOIN_CAN2:
    type: '"CAN2" joiner at the FC'
    subtype: 3 x GH-4, pins bussed, no terminator
    pinlabels: [A_VCC, A_CAN_H, A_CAN_L, A_GND, B_VCC, B_CAN_H, B_CAN_L, B_GND, C_VCC, C_CAN_H, C_CAN_L, C_GND]
    shorts: {VCC: [1, 5, 9], CAN_H: [2, 6, 10], CAN_L: [3, 7, 11], GND: [4, 8, 12]}
  FC_CAN2:
    type: FC CAN2 (Pixhawk 6C Mini)
    pinlabels: [VCC, CAN_H, CAN_L, GND]
    notes: CAN_P2_DRIVER 2, supplies bus 5 V
  TERM_FWD: &termplug
    type: Terminator plug, bus 2 forward end
    subtype: GH-4, 120 ohm CAN_H to CAN_L
    pinlabels: [VCC, CAN_H, CAN_L, GND]
  TERM_AFT:
    type: Terminator plug
    subtype: GH-4, 120 ohm CAN_H to CAN_L
    pinlabels: [VCC, CAN_H, CAN_L, GND]

cables:
  W_FWD: &lead4
    type: GH-4 lead, crimped 28 AWG
    wirecount: 4
    wirelabels: [VCC, CAN_H, CAN_L, GND]
    colors: [RD, YE, GN, BK]
    length: 385 mm
    notes: "trunk: forward joiner J3 to sense board J1; 385 with the P50B incl. hatch loop, 200 with the Tattu (th-main 6c3e93b)"
  STUB_AS: {<<: *lead4, length: 133 mm, notes: "STUB: airspeed module (GH port faces aft, th-blender 5f1012f) to joiner J1, plug from below"}
  W_BAY: {<<: *lead4, length: 236 mm, notes: "routed, with hatch loop"}
  STUB2: {<<: *lead4, length: 60 mm, notes: joiner to FC CAN2}

connections:
  # forward joiner (th-main 6c3e93b): J1 stub from the module, J2 terminator plug, J3 trunk to the sense board
  - - AIRSPEED: [1-4]
    - STUB_AS: [1-4]
    - JOIN_FWD: [1-4]
  - - JOIN_FWD: [5-8]
    - [-->, -->, -->, -->]
    - TERM_FWD: [1-4]
  - - JOIN_FWD: [9-12]
    - W_FWD: [1-4]
    - CHARGE_J1: [1-4]
  - - CHARGE_J1: [1-4]
    - [--, --, --, --]
    - CHARGE_J2: [1-4]
  - - CHARGE_J2: [1-4]
    - W_BAY: [1-4]
    - JOIN_CAN2: [1-4]
  - - JOIN_CAN2: [5-8]
    - STUB2: [1-4]
    - FC_CAN2: [1-4]
  - - JOIN_CAN2: [9-12]
    - [-->, -->, -->, -->]
    - TERM_AFT: [1-4]