How to install OpenWrt 21.02 on Teltonika RUT955 router?

[matt76]

Has anyone successfully flashed Teltonika RUT955 router running Teltonika RUT9XX_R_00.06.07(should be modified OpenWRT Chaos Calmer) with vanilla OpenWRT 21.02.1? If I try to upgrade the firmware with "sysupgrade" utility, then I get the "Invalid image, not supported on this device." error message:

root@Teltonika-RUT955:~# uname -a
Linux Teltonika-RUT955.com 3.18.44 #1 Wed Sep 30 10:11:52 UTC 2020 mips GNU/Linux
root@Teltonika-RUT955:~#
root@Teltonika-RUT955:~# sysupgrade -v /tmp/openwrt-21.02.1-ath79-generic-teltonika_rut955-squa
shfs-factory.bin
Invalid image, not supported on this device.
Image check 'platform_check_image' failed.
root@Teltonika-RUT955:~#

[rj-45]

Have you tried the sysupgrade-file ( http://downloads.openwrt.org/snapshots/targets/ath79/generic/openwrt-ath79-generic-teltonika_rut955-squashfs-sysupgrade.bin ) instead of the factory-file?

[matt76]

Yes, but I got the same error message. In addition, I tried from the Teltonika web GUI, but unfortunately without success.

[rj-45]

Next try, have you tried the builtin device recovery ( https://wiki.teltonika-networks.com/view/RUT955_Device_Recovery_Options ) and used the openwrt-factory-file?

[reinerotto]

Using 21.2.0 on multiple RUT955's. Very first flash the openwrt-factory image, using U-Boot web recovery. After this initial flash, you can use sysupgrade.