Where to find your DJI O3 Air Unit firmware version
The DJI O3 Air Unit stores its firmware version in the DJI Fly app, not on the device itself. You check it by connecting the air unit to your remote controller, then opening the app on your phone. The version number appears in the device information section — it takes about 30 seconds once the connection is live.
The air unit is the small box that mounts on your drone and transmits video to your goggles or remote. It does not have a screen, so you cannot read the firmware directly from the hardware. The DJI Fly app is the only way to see what version is currently installed.
You will need the remote controller powered on, the air unit mounted and powered on, and your phone with the DJI Fly app already installed. If you do not have the app yet, read it from the Apple App Store or Google Play Store before you start.
Key Takeaways
- Open the DJI Fly app on your phone after connecting your remote controller and powering on the air unit.
- Tap the camera icon at the bottom of the screen, then select the air unit from the device list to see its firmware version.
- The firmware version appears under Device Information or Camera Settings, depending on which DJI Fly app version you have.
- Write down the version number before you close the app so you can compare it to the latest version on the DJI website.
Step-by-step: checking firmware in the DJI Fly app
Power on your remote controller first, then power on the air unit. Wait 10 to 15 seconds for them to establish a connection — you will see a green light on the remote when the link is active. Open the DJI Fly app on your phone.
At the bottom of the screen, tap the camera icon (it looks like a small square with a lens). A list of connected devices will appear. Select the air unit from that list — it will be labeled as "O3 Air Unit" or similar. The app will load the device information page.
Look for a section called Device Information, Settings, or Camera Settings. Scroll down if you do not see it when ready. The firmware version will be listed as a number like "01.00.0800" or similar. Write this number down or take a screenshot so you have it for comparison later.
What the firmware version number means
The firmware version uses four numbers separated by periods, like 01.00.0800. Each number represents a different level of update. The first two numbers change when DJI releases a major update. The last two numbers change for smaller fixes and improvements.
You do not need to understand what each number means — you only need to know whether your version matches the latest one available. If the numbers are different, a newer version exists. DJI publishes the current version on their official website, and you can compare your number to theirs.
Comparing your version to the latest release
Visit the official DJI website and search for "O3 Air Unit firmware" or "O3 Air Unit release notes." DJI lists the current firmware version and the date it was released. Write down the latest version number and compare it to the one you found in the app.
If your version number is lower than the latest one, an update is available. If the numbers match, your air unit is current. Keep in mind that DJI sometimes rolls out updates in stages, so the latest version on their website may not be available to you when ready — the app will notify you when an update is ready to install on your device.
Why your firmware version matters
Firmware updates fix bugs, improve video transmission stability, and add new features. An older firmware version might have a known issue that affects video quality or connection reliability. Checking your version tells you whether you have access to the latest fixes.
You are not required to update when ready after a new version releases. However, if you are experiencing connection drops, video glitches, or other problems, checking whether a newer firmware exists is one of the first troubleshooting steps. Many reported issues are resolved in updates released after the hardware ships.
What to do if you cannot see the firmware version
If the device information section does not show a firmware version, the connection between your phone and the air unit may not be complete. Close the DJI Fly app entirely and reopen it. Make sure the remote controller is powered on and the air unit is powered on, with at least 10 seconds of connection time before you open the app.
If the version still does not appear, restart your phone. Sometimes the app cache becomes outdated and prevents the device information from loading. After restarting, power on the remote and air unit again, wait for the connection light to turn green, and open the app fresh.
If you have tried these steps and the firmware version still will not display, the air unit may have a hardware issue or the app may need to be reinstalled. Uninstall the DJI Fly app from your phone, restart your phone, then reinstall the app from the app store. This clears any corrupted files that might be blocking the display of device information.
Frequently Asked Questions
Can I check the firmware version without connecting to my phone?
No. The O3 Air Unit has no screen or buttons, so there is no way to view the firmware version directly on the hardware. The DJI Fly app is the only tool that can read and display the version number. You must use a phone or tablet with the app installed.
Does checking the firmware version use any battery power?
Yes, but very little. Checking the version keeps the air unit powered on for a few minutes while the app reads the information. If your battery is low, charge it before you check, but the act of checking itself does not drain the battery significantly.
What if the DJI Fly app shows a different version than the DJI website?
The version in the app is what is actually installed on your air unit. The DJI website shows the latest version available for read. If they differ, your air unit has an older version and an update is available. The app will prompt you to update when you connect the air unit and open the app.
Can I check the firmware version if the air unit is not mounted on the drone?
Yes. The air unit does not need to be mounted on the drone to check its firmware. It only needs to be powered on and connected to the remote controller. You can hold it in your hand or place it on a table while you check the version in the app.