Searching files from earlier firmware to test rollback

stevendessein 2 months ago

Hi,

could anyone provide gupdate.gsp files from earlier firmware versions (non music) ?

Especially searching for fw 19.xx and 20.xx

-> if you're using garmin express you can find it in folder C:\ProgramData\Garmin\CoreService\Downloads\Firmware

Thanks !

Top Replies

stevendessein 1 month ago in reply to Lewis +2

Hi,
look at the other post:
https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-255-series/398885/forerunner-255-dynamic-source-switching-off-lactate-threshold-values-fixed-lt-guided…
Cooad 2 months ago +1

It looks like I have 19.18 firmware, who would have thought? You can download it here:

https://filebrowser-share.cooad.duckdns.org/api/public/dl/K52WSfx0/tmp/19.18.zip

Let me know if the rollback works…
stevendessein 2 months ago in reply to Cooad +1

Hi,
thanks for this !

Now on 19.18.
rollback works, I rolled back earlier from 21.20 to 18.21, see my post which contains instructions
19.18: this was not a 'downgrade' but a ' manual upgrade' - just…

All Replies

0 2247491 11 days ago in reply to 3093649

Thank you for your answer. Unfortunately I cannot access the link.

0 3093649 11 days ago in reply to 2247491

Try this one: https://www.mediafire.com/file/1hbnem6c23xely4/gpupdate_FR255Music_13.12.zip/file

0 2247491 11 days ago in reply to 3093649

Thank you again! This download works, but the firmware is not recognized by the watch. :-(

This means the firmware for FR255music differs from the one for FR255smusic.

0 Flavien_Fcubed 6 days ago

Hi, I'm looking for firmware for the FR255 Music. Does anyone have a version more recent than v13.xx? Preferably something like 19.xx, but I won't be picky, considering how hard these firmware versions are to find!

0 9162457 23 hours ago

Does anybody have 16.xx for the Forerunner 255 Music?