Hello,
I recently tried fastbooting a device with the same product code as yours, and the process went smoothly without any issues.
I’ve summarized and updated the instructions on how to do it. Here they are:
Please try to perform the following procedure with this TRB device:
- Download “ADB software” and “rootfs.ubi” file from here: https://kaunas.teltonika.lt:444/f/a9ffe2e9d98446f2aaf3/?dl=1
- Install ADB software. More information can be found in this forum page(Video tutorial - https://www.youtube.com/watch?v=LbAq6d2Du0U)
- Turn off/unplug TRB142
- Press and hold reset button, at the same time plug the power cable and keep holding reset button for about 5 seconds (mobile signal LED’s should start blinking). Connect TRB to PC via USB cable.
- Place rootfs.ubi file in any easily accessible directory (e.g. in “C:\Test”)
- Open CMD (“Command Prompt” window) with administrator rights
- Use cd command to navigate to the place where you saved the rootfs.ubi file (Example: cd C:\Test)
- Then use this command: fastboot flash rootfs_a rootfs.ubi
- When it completes, use this command: fastboot flash rootfs_b rootfs.ubi
- When both commands are executed and finished running, unplug power from TRB and plug it again. It should boot up as normal (or use fastboot reboot command)
- Install desired firmware version to TRB through WebUI. Latest firmware can be downloaded from here: TRB140 Firmware Downloads - Teltonika Networks Wiki
Best regards,
Marijus