DJI Six-Pin Cable: SBUS Radio Control + ELRS
One cable, two separate jobs
Power + MSP/DisplayPort run video and OSD. SBUS optionally carries DJI radio control. They are configured separately.
Never copy wire colors blindly. Match signal names using the exact air-unit and flight-controller diagrams, then confirm connector orientation and voltage.
1. The six conductors
| Function | Purpose | Typical FC destination |
|---|---|---|
| Power | Air-unit supply | Verified compatible pad |
| Ground | Power return | GND |
| Air Unit TX | MSP/OSD data out | FC RX |
| Air Unit RX | MSP/OSD data in | FC TX |
| SBUS | DJI radio control | FC SBUS pad or suitable RX |
| SBUS ground | Signal reference | GND per diagram |
2. Safe installation
- Remove props; disconnect LiPo and USB.
- Verify both connector pinouts and input voltage.
- Route away from carbon edges, prop arcs and motor wires.
- Add strain relief without crushing the plug.
- Install the air-unit antenna before battery power.
- Use a smoke stopper for first power when practical.
- Use a fan during long bench sessions.
3. Betaflight for DJI SBUS
IdentifierMSPSerial RXTelemetrySensorPeripheral
UART1ONDISPLAY
UART2ON
Use your actual UART numbers. Enable Serial RX on the UART receiving SBUS. In Receiver, choose Serial (via UART) and SBUS. A dedicated SBUS pad may include hardware inversion; normal RX-pad requirements vary by FC.
4. Link and test DJI control
- Update compatible air unit, goggles and remote firmware.
- Bind air unit to goggles and verify video.
- Bind the compatible DJI remote for that generation.
- Verify all axes and AUX switches in the Receiver tab.
- Confirm directions, centers and endpoints.
- Turn the radio off and verify failsafe—props removed.
5. Why ELRS is usually better
| Area | DJI SBUS | ExpressLRS |
|---|---|---|
| Radio choice | Compatible DJI remotes | Many EdgeTX radios/modules |
| Telemetry | Limited ecosystem | Rich CRSF telemetry |
| Packet rates | Limited | Selectable rates/modes |
| Video independence | Tied to DJI chain | Independent control link |
| Repair options | Air-unit path involved | Small receiver replacement |
Fly Gear recommendation: keep DJI power, ground and MSP wires for video/OSD; remove or isolate the SBUS signal; use a properly installed ELRS receiver for flight control.
6. Install ELRS
ELRS TX
→
FC RXELRS RX
←
FC TX- Ports: Serial RX on the ELRS UART only.
- Receiver: Serial (via UART), provider CRSF.
- Telemetry enabled.
serialrx_inverted = OFFserialrx_halfduplex = OFF- Bind with a phrase when possible; match ELRS major versions.
- Verify channels, LQ/RSSI telemetry and radio-off failsafe.
Do not run two receivers. When ELRS controls the quad, remove or isolate the DJI SBUS conductor. Leave power, ground and MSP TX/RX connected for video and OSD.
Official references
DJI O4 Support · Betaflight Setup · Receiver Tab · ELRS Wiring
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