Chapter 2: Flight Controller Wiring

The wiring diagram for the AeroEgg Technology AET H743 Basic flight controller is shown below: Common peripherals include GPS modules, SBUS receivers, ELRS receivers/TBS CRSF receivers, digital video air units (including DJI O3, O4, and Vista; Caddx Avatar series; and OpenIPC open-source HD video systems), airspeed sensors, and compasses.

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

Serial-Bus Receiver Wiring Example: For an ELRS receiver 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 port on the Serial Ports page in the ground station.

GPS Module (with Compass) Wiring Example For a GPS module, we recommend connecting it to the flight controller UART2 port as shown above.

Connect GPS R (or RX) to flight controller TX2, and GPS T (or TX) to flight controller RX2.

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

Connect GPS SCL to flight controller SCL1 and GPS SDA to flight controller SDA1. CL and DA are the I2C bus connections for the compass integrated into the GPS module. A compass is optional on conventional fixed-wing aircraft. If the GPS module has no compass, CL and DA do not need to be connected.

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

Digital Video Air Unit Wiring Example For a digital video air unit, we recommend using the flight controller TX1, RX1, 9V, and GND pins on UART1. Connect air-unit R (or RX) to flight controller T1, and air-unit T (or TX) to flight controller R1.

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 FPV 2 radio transmitter. If the DJI FPV 2 radio transmitter is not used, only four wires are required between the air unit and flight controller. After wiring, configure the corresponding port on the Serial Ports page in the ground station.

Servo Wiring Example Servo leads normally use a 2.54 mm 3-pin DuPont connector. The dark wire is generally G (GND), the red or orange-red wire is the positive 5V servo supply V, and the white or orange-yellow wire is the servo control signal S. Connect the lead to the corresponding flight controller S3-S12 output and assign the required function on the Servo Output page.

ESC Signal Wiring Example ESC signal leads normally use a 2.54 mm 3-pin DuPont connector. The dark wire is generally G (GND) and connects to the corresponding flight controller S1-S12 output ground; the light-colored or white wire is the ESC control signal S. Some ESCs include a 5V BEC output on the center wire. This output can conflict with the flight controller onboard 5V servo-power BEC, so disconnect or remove the ESC 5V wire before connecting the ESC signal lead to the flight controller. Assign the corresponding output function on the Servo Output page in Flight Controller Settings.