Question

I tried to build a custome firmware GPL but the device is unable to boot. Is there a process to recover the device?

Tanks

Jonas

Answer 1

Hello,

Yes, there are ways to recover your device, please refer to this wiki guide: https://wiki.teltonika-networks.com/view/TRB140_Device_Recovery_Options

Regards.

Comments

Hello,

The Problem is that the device is not even able to boot. The only thing i get is all signal indicator leds blinking and a connection via fastboot. Is it possible to get a working rootfs and flash it via fastboot?

The link in the following answer sadly is not valid anymore: https://community.teltonika-networks.com/20783/installing-gpl-trb140-firmware-on-new-ec25-device

Best regards

Jonas Martin

---

Yes it is possible to flash it using fastboot.

• You need to compile Static firmware image using SDK (make menu config > target images > trb14x static image)
• Once you finish compiling static image, you will be able to find it in SDK folder bin/targets/mdm9x07/generic/tltFws/
• Extract the compiled image and you should find root and kernel files inside.
• Download fastboot drivers to your PC.
• Plug your device and enter fastboot mode (hold reset button and plug power source while holding for few seconds)
• Check if your device entered fastboot mode:

fastboot devices

If your device is in fastboot mode, you get output from this command. After that enter these commands

sudo fastboot flash boot_a kernel

sudo fastboot flash boot_b kernel

sudo fastboot rootfs_a root

sudo fastboot rootfs_b root

sudo fastboot reboot

kernel and root are full file paths to these files from your active directory.

Regards.