DJI Firmware Update: Goggles 3 and the 03 Air Unit Integration

Alex -

DJI has finally integrated support for the DJI 03 Air Unit with the new DJI Goggles 3. This update comes through the latest firmware version 01.03, which applies to the DJI Goggles 3, the DJI FPV Remote Version 3, and the 03 Air Unit. In this article, we will investigate the specifics of this update, the steps needed to implement it, and some critical observations about its performance.

Firmware Update Overview

DJI's latest firmware update, version 01.03, brings official support for the 03 Air Unit on the DJI Goggles 3. This update does not include any new features or changes; it solely focuses on adding compatibility for the 03 Air Unit with the Goggles 3 when used alongside the DJI FPV Remote Version 3. The process to update is straightforward:

  1. Download the DJI Assistant for Consumer Drones.
  2. Connect your DJI Goggles 3, FPV Remote Version 3, and 03 Air Unit via USB.
  3. Follow the prompts to install the new firmware.

This setup ensures your devices are ready to be paired and used seamlessly.

Compatibility and Limitations

Remote Compatibility

One critical aspect to note is the exclusive compatibility between the devices:

  • Goggles 3 with FPV Remote Version 3: Only this combination works with the 03 Air Unit.
  • Goggles 2/Integra with FPV Remote Version 2: For these setups, you cannot mix and match remotes and goggles from different generations.

Using the correct remote and goggle combination is essential for optimal performance and functionality.

Legacy Support

Currently, this firmware update does not extend support to older units like the original Air Unit or the Caddx Vista when used with the Goggles 3. These older units remain compatible with the Goggles 2 and Integra on their last firmware version but are not supported by the Goggles 3. DJI's support appears to focus on the 03 Air Unit, suggesting that backward compatibility will not be expanded to older units.

Performance Insights

Channel and Power Settings

When using the 03 Air Unit with the Goggles 3, some channel and power limitations are noteworthy:

  • Manual Channel Selection: Without a HAM license, only one channel is available in 40 MHz mode and three in 20 MHz mode.
  • Full RF Power: Full RF power is not accessible without the HAM file in the CE region. However, applying the HAM file unlocks additional channels and full FCC power, confirmed via spectrum analyzer testing.

Latency Observations

An interesting discovery by Mads Tech was the increase in latency with the new firmware:

  • Latency Increase: Testing showed a 5-millisecond increase in the first pixel latency, from 26 milliseconds to 31 milliseconds.
  • Consistency Across Devices: This increase was consistent across the Goggles 3 and Goggles 2 when using the 03 Air Unit.

This change is perplexing and suggests a possible firmware adjustment by DJI. Despite downgrading firmware and extensive retesting, the latency increase persists.

Recommendation on Remote Usage

For users seeking the best performance and reliability, it is recommended to use a standalone remote solution, such as ExpressLRS or Crossfire, instead of DJI's remote solution. The DJI FPV Remote communicates through the goggles rather than directly with the Air Unit, leading to potential signal loss if the goggles lose power or connection.

Conclusion

The firmware update for the DJI Goggles 3 and the 03 Air Unit marks a significant step forward in compatibility and functionality for FPV enthusiasts. While the integration is smooth and straightforward, there are some important considerations regarding device compatibility and performance.

DJI's focus on newer units indicates a clear path forward, leaving some legacy support behind. Users should also be aware of the increased latency observed with the latest firmware and consider alternative remote solutions for critical applications.