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F4 Flight Controller Manual

front_layout

Layout

Front Layout.

side_layout

back_layout

Back Layout

esc

FLIGHT CONTROLLER TO ESC CONNECTIONS USING CONNECTOR

Connect the flight controller to the ESC using the provided multi-wire connector. This link carries throttle signals, telemetry, and power (if supported), ensuring clean and reliable communication between the FC and ESC. Note: Ensure correct connector orientation and secure fit before powering the system.

elrs

FLIGHT CONTROLLER TO ELRS CONNECTIONS CONNECTOR

Connect the ELRS receiver to the flight controller using UART interface: 5V and GND for power, TX (receiver) to RX (FC), and RX (receiver) to TX (FC). This enables reliable control signal communication. Note: Always cross TX ↔ RX lines and verify the correct UART port in firmware configuration.

gps

FLIGHT CONTROLLER GPS CONNECTIONS

Connect the GPS module to the flight controller using UART: 5V and GND for power, TX (GPS) to RX (FC), and RX (GPS) to TX (FC). Additional SDA/SCL lines are used for compass (I2C) communication if available. Note: Mount the GPS module away from power electronics and ensure correct UART and I2C configuration in firmware.

cam

Camera Connection

  • To enable the FPV feed and On-Screen Display (OSD), connect the camera using:
  • VCC (Red): Connect to 5V pad on FC
  • GND (Black): Connect to GND pad
  • VID (White/Yellow): Connect to CAM (Video In) pad
vtx

FLIGHT CONTROLLER VTX CONNECTIONS

  • This connection transmits the processed video signal (with OSD) from the flight controller to your Video Transmitter (VTX) for wireless broadcast.
  • 5V (Red): Powers the VTX from the flight controller’s 5V pad.
  • GND (Black): Connects to the GND pad to complete the power circuit.
  • VT (Yellow): Connects the VTX video input to the VT (Video Out) pad on the flight controller.
  • TX (White): Connects to the R1 (UART1 Receive) pad. This enables SmartAudio or Tramp protocols, allowing you to change VTX channels and power levels via your radio sticks.
dji

FLIGHT CONTROLLER DJI 03 CONNECTIONS

  • Connect the DJI O3 Air Unit to the flight controller via UART: power (5V/VBAT as required), GND, TX (FC) to RX (O3), and RX (FC) to TX (O3). The SBUS wire from the O3 can be connected to the FC’s SBUS/RC input for direct receiver signal output.
  • Note: Enable MSP/OSD on the selected UART and configure SBUS input in firmware if using the O3’s built-in receiver output.
dji_04

FLIGHT CONTROLLER DJI O4 PRO CONNECTIONS

  • Connect the DJI O4 Pro Air Unit to the flight controller via UART: power (5V/VBAT as required), GND, TX (FC) to RX (O4), and RX (FC) to TX (O4). The SBUS wire from the O4 Pro can be connected to the FC’s SBUS/RC input for direct receiver signal output.
  • Note: Enable MSP/OSD on the selected UART and configure SBUS input in firmware if using the O3’s built-in receiver output.Note: Enable MSP/OSD on the selected UART and configure SBUS input in firmware if using the O4 Pro built-in receiver output.
dji_04_lite

FLIGHT CONTROLLER DJI O4 lITE CONNECTIONS

  • Connect the DJI O4 Lite Air Unit to the flight controller via UART: power (5V/VBAT as required), GND, TX (FC) to RX (O4), and RX (FC) to TX (O4). The SBUS wire from the O4 Lite can be connected to the FC’s SBUS/RC input for direct receiver signal output.
  • Note: Enable MSP/OSD on the selected UART and configure SBUS input in firmware if using the O4 Lite built-in receiver output.
dji_air

FLIGHT CONTROLLER DJI AIR UNIT CONNECTIONS

  • Connect the DJI Air Unit to the flight controller via UART: power (5V/VBAT as required), GND, TX (FC) to RX (Air Unit), and RX (FC) to TX (Air Unit). The SBUS wire from the Air Unit can be connected to the FC’s SBUS/RC input for direct receiver signal output.
  • Note: Enable MSP/OSD on the selected UART and configure SBUS input in firmware if using the Air Unit built-in receiver output.
led

FLIGHT CONTROLLER LED CONNECTIONS

  • These components provide visual and audible feedback for flight status, battery warnings, and lost-model recovery.
  • LED Strip:
  • 5V (Red): Connects to the 5V pad for power.
  • GND (Black): Connects to the G (Ground) pad.
  • LD (Green): Connects to the LED pad on the flight controller to control color and patterns.
  • Buzzer:
  • B+ (Red): Connects to the 5V pad.
  • B- (Black): Connects to the B- pad. The flight controller toggles this ground connection to trigger the alarm.