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Hello,

I try to update my rut955 with the last firmware by the bootloader. I downloaded the file from the Teltonika site and check the checksum and it is ok.

I process the update as described and when adding the firmware file I have a feedback that the checksum is bad.

How to proceed with this issue ?

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Hello,

Thank you for contacting us.
I would like to inform, that bootloader in RUT2XX and RUT9XX does not allow to use RutOS 7 or higher firmware file.
Bootloader accepts only legacy firmware, in this case - firmware version 6.8.6 file.
After that you could upgrade firmware using FOTA, file or SSH.
Hope it helps.

Best regards,

Sigitas