Chapter 2: Flight Controller Wiring

The wiring diagram for the AeroEgg AET F405A WING flight controller is shown below:

Warning: The capacitor must be connected. Operating without it may damage the flight controller.

Common peripherals include GPS modules, SBUS receivers, ELRS receivers/TBS CRSF receivers, digital video air units (including DJI O3, O4, and Vista; the Caddx Avatar series; and the open-source OpenIPC HD video system), airspeed sensors, electronic compasses, and other devices.

GPS modules, SBUS receivers, ELRS receivers, TBS CRSF receivers, telemetry modules, and digital video air units are serial-port peripherals. The compass in a GPS module and an analog airspeed sensor are I2C bus peripherals.

Connect an analog I2C airspeed sensor to the flight controller SDA and SCL pins. See Chapter 4, Section 12 for details.

Serial-Bus Receiver Wiring Example:

For an ELRS or TBS CRSF receiver, we recommend connecting it to the flight controller UART2 port as shown above.

Connect receiver R (or RX) to flight controller TX, and receiver T (or TX) to flight controller RX.

Connect receiver V (or 5V) to flight controller 4V5, and receiver G (or GND) to flight controller G.

After wiring, configure the corresponding settings on the ground station Serial Ports page.

GPS Module (Including Electronic Compass) Wiring Example For a GPS module, we recommend connecting it to the flight controller UART5 port as shown above.

Connect GPS R (or RX) to flight controller TX, and GPS T (or TX) to flight controller RX.

Connect GPS V (or 5V) to flight controller 4V5, and GPS G (or GND) to flight controller G.

Connect GPS C to flight controller CL, and GPS D to flight controller DA. CL and DA are the I2C bus connections for the electronic compass integrated into the GPS module. A traditional fixed-wing aircraft does not necessarily require an electronic compass. If the GPS module has no compass, CL and DA do not need to be connected.

After wiring, configure the corresponding settings on the ground station Serial Ports page.

Digital Video Air Unit Wiring Example

For a digital video air unit, we recommend connecting it to the flight controller HDVTX interface (UART3 port) as shown above.

Connect air unit R (or RX) to flight controller T3, and air unit T (or TX) to flight controller R3.

Connect air unit V to flight controller 9V, and air unit G (or GND) to flight controller G.

DJI air units include an SBUS receiver module for pairing with the DJI FPV2 radio transmitter. If you are not using a DJI FPV2 radio transmitter, disconnect the SBUS wire from this ribbon-cable connector.

If you use a DJI FPV2 radio transmitter, keep the SBUS wire connected.

After wiring, configure the corresponding settings on the ground station Serial Ports page.

Servo Wiring Example

Servo connectors are generally 2.54 mm 3-pin Dupont connectors. The dark servo wire is normally G (GND). The red or orange-red wire is the positive 5V servo supply V, and the white or yellow-orange wire is the servo control signal S. Connect the servo to the corresponding flight controller S1–S10 output and configure the required assignment on the Servo Output page.

ESC Signal Wiring Example

ESC signal connectors are generally 2.54 mm 3-pin Dupont connectors. The dark wire is normally G (GND), and the light-colored or white wire is the ESC control signal S. Connect them to the corresponding flight controller S1–S10 output. Some ESCs include an internal 5V BEC. When powered, the 5V output on the center signal wire may conflict with the flight controller’s internal 5V servo BEC. For this type of ESC, disconnect or remove the 5V wire from the signal connector before connecting it to the flight controller. Configure the corresponding assignment on the flight controller Servo Output page.