One of my older RUT955 routers which is installed in a vehicle sometimes takes a lot of time after start-up or after briefly loosing and regaining GPS signal (eg. a tunnel) to start sending data to the AVL server. It is not a GPS fix problem since I can immediately see the correct position in the web UI, it's just not restarting sending it.
Given the fact that I found this thread with a similar problem - https://community.teltonika-networks.com/5802/gps-of-rut955-stops-sending-avl-data-randomly
suggesting it has been fixed in a firmware update and that I see other weird behaviour with this unit (eg. VERY slow loading admin pages compared to other 955s, even though the wifi performance on regular web browsing is normal), I decided to try updating it.
I tried the 2022 built RUT9_R_00.07.01.4 but it failed verification, probably because it is an older model router and the notes on the release page say „FW version RUT9_R_00.07.00 and above will not be supported on legacy-design (RUT955 *7V***) devices.”.
Then I tried the RUT9XX_R_00.06.08.6 (upgrade over the currently installed 00.06.02) and weirdly enough it says „Uploaded firmware image version is OLDER than current firmware version. All configuration files will be erased.” That is obviously wrong since the router is running 00.06.02 from the factory and obviously it is older than the 00.06.08.6 I was trying to flash. I did not go through with the update since I do not really want to loose my config. I have a „config only” backup but I am not sure uploading that afterwards would work since there's this discrepancy.
Is there any way I can solve the GPS issue on the old firmware or upgrade without loosing my config?
Could it be the case that the firmware image fails to upload because of the horrendous performance of the web UI and the upgrade page I am getting is actually using an older file...? (that wouldn't really make sense since I also uploaded the 07 version which was rejected before this bogus „older image” message hit me when uploading the latest factory release from Teltonika for upgrade).
When I get my hands on this unit again I'll try a CLI upgrade but until then I'd like to hear your thoughts on this situation. Thanks!