Overview

The DJI Digital FPV System is a digital video protocol that links the DJI FPV Goggles to a DJI FPV Air Unit or Caddx Vista for HD FPV.

Components

Goggles

There is only one option for goggles currently that work with the system, the DJI FPV Goggles.

DJI FPV Goggles

Note: These are not to be confused with the DJI Racing Edition (RE) Goggles, those are not compatible with the DJI Air Unit or Caddx Vista.

Camera

There are currently three options for cameras

DJI FPV Camera

This is the standard DJI FPV Camera that comes with the DJI Air Unit and the standard Caddx Vista.

Caddx Nebula Nano

Caddx’s entry into the Camera side of the DJI FPV market. There are two versions of this camera, V1 has objectively worse image quality than V2. There is no currently known way to know which one you are getting other than check the quality, all newly shipping Nebulas should have the new sensor.

Caddx Nebula Micro

Caddx’s second entry in the Camera side of the DJI FPV market. This was released soon after the Caddx Nebula Nano and uses the same sensor in a larger Micro camera form factor. This camera stands out as it will do analog or digital, and is adjustable in the analog settings, which also affects the digital settings. There is a V1 and V2 of this camera as well.

Video Transmitter (Digital VTX)

Right now there are two choices for the Video Transmitter.

DJI FPV Air Unit

This is the DJI Air Unit. There are no mounting holes on this unit, so you just strap it down to the quad somewhere. It uses two MMCX Connectors to connect two antennas for reportedly somewhat better signal in some situations. The Air Unit records HD DVR footage with an onboard SD card slot. It has a USB-C port.

Caddx Vista

The Caddx Vista is a slimmed down version of the Air Unit, without the ability to record onboard DVR and with the ability to mount onto a 20×20 stack. The Vista has a single UFL connector for a single antenna. Heat can be an issue with the Nebula so you want to provide plenty of airflow for the unit and try to only turn it on when you’re ready to fly. The Caddx Vista Video Transmitter comes bundled with either the DJI FPV Camera or the Caddx Nebula Camera.

Note: It is recommended to turn off the “Temperature Protection” in the Settings->Device menu as this will go off constantly and the Vista does not get damaged by the heat from normal use.

Radio Transmitters

DJI FPV Remote Controller

DJI’s FPV Radio Transmitter solution. Both the DJI FPV Air Unit and the Caddx Vista have a built in receiver that uses SBUS and currently this is the only radio that can communicate to that receiver. Press the Power button twice and hold the second press to turn the remote on and off.

System Accessories of Note

DJI Smart Controller

The DJI Smart Controller was originally designed to be used for a controller for the DJI Mavic drone. DJI released an update that adds the ability to plug the DJI FPV Goggles into the Smart Controller to view the live video from the goggles on the Smart Controller. In addition, this allows you to use the HDMI out on the Smart Controller to get the DJI FPV video feed wherever you need it. THIS CONTROLLER CANNOT BE USED TO CONTROL THE DJI FPV SYSTEM, ONLY TO VIEW THE VIDEO.

DJI FPV Camera Wire/Coaxial Cable

200mm Cable – FPV Cycle – Longer Cable if needed

DJI FPV Goggles Sponge Foam Padding

This is a really popular solution, and I would recommend ordering this padding at the same time as your goggles.

DJI Goggle Foam Pad

Alternative Goggle Foam option. Less popular, but quite a few people are using this instead of the Sponge Foam.

Wiring the System

Wiring the DJI FPV system is actually pretty simple.

Red goes to Vbat (2s-4s for the DJI Air Unit, or 2s-6s for the Caddx Vista) or the positive side of a BEC on your supported Flight Controller, or a separate BEC you’ve purchased for the purpose of powering the DJI Digital Video transmitter of your choosing. And black goes to the paired ground.

White/RX goes to an open TX pad on the flight controller. Gray/TX goes to an open RX pad on the flight controller. Remember, these must go onto the same UART. Then you enable MSP in the Ports tab of Betaflight or similar software, and enable the OSD.

Yellow/SBUS/DJI HDL on F4 processors goes to an inverted RX pad on an open UART, such as an SBUS or “nR” pad, just like any SBUS receiver would. On F3s and F7s it can be put on any open RX pad. Brown goes to a nearby ground to help keep the SBUS signal clean. Note: You do not need to run this wire to anything if you are not using the DJI FPV Remote Controller.

Supported OSD Elements as of DJI FPV Update v1.06

Random Facts

• The DJI FPV System does not pair to any commercial DJI product other than the DJI Smart Controller. This means it does not work to view camera drones like the Mavic.
• You can typically find the latest release notes on this DJI FPV Official Forum pinned as the top thread.