Super User Issues Q&A and Version Upgrade – January 21 2026

Issue 1: Firmware Upgrade Stuck at 99%



Symptom

The firmware upgrade process gets stuck at 99%.

Root Cause

After checking the logs, the R&D team found a software bug. In fact, the upgrade has already completed. Normally, after the upgrade finishes, the App should automatically terminate and restart. However, the new version does not perform this action, which causes the process to appear stuck at 99%.


Temporary Solution

When the upgrade reaches 99%:
  • Please wait 1 minute
  • Then restart the App or reboot the remote controller
The upgrade will be completed successfully.
This issue will be fixed in the next software release.


Issue 2: 5G Wi-Fi Instability



Symptom

If the customer’s Wi-Fi network is operating on the 5 GHz band, the remote controller may not be able to access the internet.

Cause & Solution

The remote controller Wi-Fi mode is set to Auto by default. If it cannot connect to the network, you can manually select the Wi-Fi band:


Settings → Image Transmission → Channel Mode

Select 2.4 GHz or 5 GHz manually and choose the most stable option.

Latest Test Versions
  • App: 3.0.2.9.ceresair
  • UAV Firmware: 3.40.1.12.ceres


Upgrade Notes

  • During the upgrade, the progress may stop at 99%. This means the upgrade has already completed. Please wait 1 minute, then close the App or restart the remote controller.
  • After upgrading the App, two Ceres App icons may appear on the remote controller screen. Running version 3.0.2.9.ceresair will overwrite the old version. If it does not overwrite automatically, please manually delete the old App icon.
  • You can verify the installed version number in Device Management.
  • After the upgrade is completed, you may need to log in to the App again or re pair the drone with the remote controller.