Searching files from earlier firmware to test rollback

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 :)

What hardware have you - fr255 or fr255m - it is important to know.

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 disabled 'dynamic source switching' which was introduced on v19 and doesn't work as expected (a lot of users raised issues)

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-test-restored

> additional hint: If you rolled back: don't use garmin express (sync) anymore- or it will update the firmware- even if you disabled it on the watch and on garmix express advanced settings

18.21 - GPS 9.03 CIQ 5.09 BMX 15.5.0 WHR 15.05.00 ANT/BLE 0.06 Sensor Hub 28.11

19.18- GPS 10.00 CIQ 5.0.0 BMX 16.1.2 WHR 16.01.02 ANT/BLE 0.06 Sensor Hub 30.20

For me: most important things are
- Daily Suggested workouts : since v 21: doesn't work as expected: many people are obtaining erratic suggested HR training zones
- reliable Lactate threshold values: since V21: Garmin decided to allow measurement from wrist optical HR to determine LT . They also removed the possibility to accept/decline the detected values after a workout. The guided LT test (which REQUIRED a chest wrap !) disappeared.

Concerns that were raised in beta versions were ignored. (WAS a beta tester too ...)
Noticed there is a new beta firmware v22 which doesn't handle above issues.

This post is interesting to understand all of this

https://forums.garmin.com/sports-fitness/running-multisport/f/forerunner-965/399416/quality-of-garmin-software#pifragment-1279=1

Anyone with firmware 17.XX, after this firmware all the issues started to happen, the 255 non music version, thanks

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-test-restored
it has a link to folder with 255 non music  fw files : 19.18 18.21 17.21 11.12 

thanks!!

Thank you, stevendessein

. I've rolled back to 18.21 firmware. Already tested it! In my case, the track is more evenly recorded when I walk. On newer firmware versions the track is recorded crookedly for some reason. This only applies to walking! - - When i cycling, everything is recorded equally well

Hi everyone,

What about FR 255s music? Does anyone have older firmware files for this one?

I am interested in 13.xx 14.xx 15.xx official releases.

For those using Garmin Express, older gupdate.gsp files can be found in:

C:\ProgramData\Garmin\CoreService\Downloads\Firmware...

I have the following firmware versions, if anyone interested: 16.17, 16.19, 17.26, 19.18 (link below)

mega.nz/.../5293CAhT

I have the 13.23 firmware for FR 255 Music. I think it is the same as S version.

https://dropmefiles.com/8mt5e