When the firmware update V02.02.0401 is being generated, it marks an error 0x020503 and remains at 81% of the update.
100% complete downloading.
100% complete transmitting.
Updating to 81% and the above mentioned error is cut and marked.
Various computers have been tried.
The same happens when you want to download the version to V02.02.0312
100% complete downloading.
100% complete transmitting.
Updating to 68% and it cuts and marks the same error mentioned above.
Drone battery above 80% charge.
It cannot be updated or downgraded.

I had something like this happen to my P4 RTK when I first got it and had to send it back for another. It would not connect to the controller or my computer afterwards. I hope the same thing hasn't happened to you.

Hi Ariosl, try to update your aircraft using the DJI GS RTK app. Connect the USB-C port on the remote controller to the Micro USB port on the aircraft via a USB-C OTG cable and a Micro USB cable. (see User Manual, p.73)  Cheers, Maurizio

Maurizio,

I am experiencing similar issues and the controller cannot recognize the aircraft. All the lights on the aircraft stay red, and directly connecting the aircraft to the controller using the USB cable does not help. The controller still does not see the aircraft.

When I connect the aircraft to the DJI Assistant software, it reports the aircraft firmware version as v01.05.0106.

Is there a next step? I am very technically minded if the solution is involved.

Hi ariosl I now have the same issue. Did you find a solution to this?

fans4cf8ab67 Posted at 3-22 08:37
Hi ariosl I now have the same issue. Did you find a solution to this?

Have you tried this?

"Hi Ariosl, try to update your aircraft using the DJI GS RTK app. Connect the USB-C port on the remote controller to the Micro USB port on the aircraft via a USB-C OTG cable and a Micro USB cable. (see User Manual, p.73)  Cheers, Maurizio"

1. SWITCH TO A FASTER INTERNET CONNECTION
Android system updates, especially those that add new features, can be between 500MB to 1.5 GB. Hence, using a stable internet connection when downloading these updates is vital. To start, you can run a quick speed test on your phone and verify the strength of your internet connection.

Alternatively, you could switch to a different network connection to see if that helps. If you’re connecting to a Wi-Fi network, use the 5 GHz frequency rather than the 2.4 GHz frequency for better download speeds.

2. CHARGE YOUR PHONE
Installing system updates takes time. Your Android phone may not install an update if it does not have enough battery power. This prevents your phone from shutting down in the middle of an update.
Ideally, you should make sure that your phone has over 50% battery before you install any update. You can also leave your phone plugged in to ensure that it does not run out of power.

3. FREE UP STORAGE SPACE
A lack of storage space can also lead to the ‘Android system update failed to install’ error. It is, in fact, one of the most common reasons why Android updates fail to install. You’ll need to check your phone’s storage status to rule out this possibility.

Head over to the Settings app and tap on Storage to view a breakdown of the storage.

Greetings,
Peter

petergroft Posted at 4-3 21:27
1. SWITCH TO A FASTER INTERNET CONNECTION
Android system updates, especially those that add new features, can be between 500MB to 1.5 GB. Hence, using a stable internet connection when downloading these updates is vital. To start, you can run a quick speed test on your phone and verify the strength of your internet connection.

We're talking about firmware updates, not Android System updates Peter. On a dedicated Android device, not a phone.

I'm quite annoyed at how difficult it is to update firmware on the drones - I have a Mini 4 Pro and am using a 1 GB internet wired connection on the computer, with the drone connected via USB cable to the computer with the DJI Assistant 2 application - lots of storage on the drone - yet it gets to 68% updating and fails each time.  Why is this still an issue, seems like it should be very simple.  

wynquest9206 Posted at 11-20 14:19
I'm quite annoyed at how difficult it is to update firmware on the drones - I have a Mini 4 Pro and am using a 1 GB internet wired connection on the computer, with the drone connected via USB cable to the computer with the DJI Assistant 2 application - lots of storage on the drone - yet it gets to 68% updating and fails each time.  Why is this still an issue, seems like it should be very simple.

Hi there. Thank you for reaching out and we're deeply sorry for the trouble that this has caused. Please try to uninstall the DJI Assistant 2 software on your computer and please install the version on the link below. In addition, does the issue show when the firmware is downloading or installing? Please provide us screenshots or screen recordings for us to check the behavior. Thank you.

https://www.dji.com/global/downl ... sumer-drones-series