How to Check Your DJI O3 Air Unit Firmware Version

Check your O3 Air Unit firmware in the DJI Fly app

The easiest way to see what firmware version your O3 Air Unit is running is through the DJI Fly app on your phone or tablet. Connect your remote to the air unit as you normally would before flying, then open the app and look at the device information screen. The firmware version appears there alongside other hardware details.

You do not need to update or change anything to check the version — you are only looking at what is already installed. This takes about 30 seconds and works whether your firmware is current or several versions behind.

Key Takeaways

Open DJI Fly, connect your remote to the air unit, and tap the device information icon to see the current firmware version number.
The O3 Air Unit firmware version appears on the same screen as your remote controller and battery information.
You can check the version without updating, and checking does not require an internet connection once the app is open.
If you see a firmware update available in the app, you can choose to update immediately or wait until a time that suits your flying schedule.

Step-by-step: finding firmware in the DJI Fly app

Start by powering on your remote controller and the air unit. Open the DJI Fly app on your phone or tablet. If you have not connected before, the app will walk you through pairing — follow those steps until the live camera feed appears on your screen.

Once you see the camera feed, look for the three-line menu icon (sometimes called a hamburger menu) or a settings icon, usually in the top left or bottom right corner depending on your app version. Tap it to open the menu. Look for an option labeled "Device" or "Aircraft" — this is where all the hardware information lives.

Tap on the air unit or aircraft name in that menu. A new screen will open showing the firmware version, serial number, and other hardware details. The firmware version number appears as a string like "01.00.0700" or similar. Write this down or take a screenshot if you want to compare it later.

What the firmware version number means

DJI firmware versions follow a pattern: the first two digits are the major version, the middle two are the minor version, and the last four are the build number. A version like "01.00.0700" means major version 01, minor version 00, build 0700.

You do not need to understand this breakdown to use your air unit — it is only useful if you are comparing your version to a list of known issues or trying to figure out whether you are behind on updates. DJI publishes release notes for each version on their website, which explain what changed and what bugs were fixed.

Checking firmware when the app will not connect

If your remote and air unit are not connecting to the DJI Fly app, you can still see the firmware version on the air unit itself. Power on the air unit alone (without the remote) and look at the small LED lights on the back. The light pattern tells you the battery level and connection status, but not the firmware version.

The firmware version is stored in the air unit's memory and cannot be read from the LED lights alone. If the app will not connect, the problem is usually a pairing issue or a software glitch on your phone. Try restarting both the remote and the app, then attempt to connect again. If that does not work, you may need to re-pair the remote to the air unit through the app's settings menu.

When DJI shows a firmware update is available

After you check the version, the DJI Fly app may tell you that a newer firmware is available. You will see a notification or a button offering to update. You can choose to update right away or dismiss the notification and update later.

Updates usually take 10 to 20 minutes and require a stable internet connection and a fully charged battery on both the remote and air unit. The app will warn you if either battery is too low. Do not interrupt an update once it starts — if the connection drops or the battery dies during an update, the air unit may not work until you complete the update successfully.

Comparing your firmware to the latest version

To find out whether your firmware is the newest version, visit the DJI support website and search for "O3 Air Unit firmware." DJI lists the current version and the release date there. You can also check the DJI Fly app — if an update is available, the app will show you the new version number before you choose to install it.

Firmware updates are released irregularly, sometimes several months apart. There is no fixed schedule, so checking the DJI website or waiting for the app notification is the only way to know when something new is out. Older firmware versions continue to work, but newer versions often include bug fixes and performance improvements.

Troubleshooting: firmware information will not display

If the device information screen shows a blank firmware field or an error message, the most common cause is that the app has not fully synced with the air unit yet. Disconnect the remote from the app (usually by tapping a disconnect button), wait 10 seconds, then reconnect and try again.

If the problem persists, close the DJI Fly app completely and reopen it. On most phones, you can do this by swiping up from the bottom of the screen (or swiping down from the top on older Android phones) to see open apps, then swiping the DJI Fly app away. Reopen it from your home screen. This clears any temporary glitches that prevent the app from reading the air unit's information.

Frequently Asked Questions

Can I check the firmware version without connecting to the internet?

Yes. Once the DJI Fly app is open and connected to your air unit, you can see the firmware version without an internet connection. You only need internet if you want to download and install a new firmware version.

What happens if I do not update the firmware?

Your air unit will continue to work with older firmware. However, newer versions often fix bugs and improve performance, so updating when a new version is available is usually a good idea. You can update whenever you have time — there is no deadline.

Does checking the firmware version use up battery?

No. Checking the version in the app uses almost no power. The air unit and remote will drain battery normally while powered on, but viewing the firmware information does not speed that up.

Why does the app show a different firmware version than what I saw last week?

You may have updated the firmware without realizing it. Some phones are set to auto-update apps, and the DJI Fly app may have installed a firmware update in the background. Check the app's update history in your phone's settings to see when updates occurred.

Can I downgrade to an older firmware version?

DJI does not provide a straightforward way to downgrade firmware. If you need to go back to an older version because a new one is causing problems, contact DJI support — they can sometimes help, but it is not a standard process.

This guide is for general information only and is not medical, financial, legal, or other professional advice. For decisions specific to your situation, consult a qualified professional. See our Editorial Policy.