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To perform a firmware update using an update package, please use a Windows or Mac computer.

NVMD-C200 Firmware Update Guide

1. Download the firmware package from DNT Firmware Update Center.

2. Extract the downloaded ZIP file to obtain the .swu firmware file.

3. Connect the NVMD-C200 to your computer using a data cable. The device will appear as an external storage drive.

4. Copy the .swu file into the root directory of the NVMD-C200 drive.

5. Safely eject the drive from your computer after the transfer is complete.

6. Restart the NVMD-C200. The power indicator will blink orange during the update process.

7. When the indicator turns solid blue, the update is complete.

8. Go to System Settings > Version No. to verify the installed firmware version.

To ensure optimal performance, please update your device’s firmware to the latest version.

Note for TNC225R, HYDRA, and HYDRA-LRF Users: macOS does not natively recognize these scopes when connected via USB because they register as Android devices. To successfully connect your scope to a Mac, you will need to use a third-party file transfer application designed for macOS and Android communication, such as OpenMTP.

Newest Version No.
Improved
Date
Download

Please check whether the DNT app is the latest version before the OTA upgrade

DNT OPTICS APP
DNT OPTICS APP
Prerequisites:USB cable and battery
• Note：A SD card is not required since the TNC225R has internal 32GB of storage.
• For Mac users, please download the Android File Transfer first to ensure successful use of the Hydra and ThermNight TNC225R.

Important Notice for macOS Users:

By default, macOS Archive Utility treats the .swu firmware file as an archive and extracts it into a folder. This prevents the NVMD-C200 from recognizing the update, as the device requires the original .swu file.

You have two options to ensure correct extraction:

Option 1:

Open Archive Utility > Preferences, then uncheck “Keep Expanding if Possible.” After this change, double-clicking the firmware ZIP file will correctly generate the original .swu file.

Option 2:

Use a third-party extraction tool such as The Unarchiver.

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