Vivoactive 5 pairDevice not working anymore

Have you tried rebooting the watch?  press and hold the upper button for 15-20 seconds and the watch turns off.  Then turn it back on.

I'm able to pair my va5 with no issue.

Yes i've tried several things, connect seems to work with your app https://apps.garmin.com/en-US/apps/9bcc8b66-8385-4afb-b93e-f69e01422284 (Great for testing !) 

I am using a class that extend Toybox.BluetoothLowEnergy.BleDelegate to scan and connect.

Currently i'm trying to remove services to see if that is the problem and looking for solutions. But i don't understand HOW a garmin firmware update can break the datafield that way ? 

I tried SDK sample NordicThingy52 and i can connect fine with the App. Then i tried the NordicThingy52CoinCollector datafield sample and i have the same behavior with my datafield, device is scanned but after pairDevice, connect never happen.

Edit : I found an nRF53 evaluation board and flashed the examples on both the watch and the board. The result: the watch app scans and connects fine, but the watch data field still doesn’t work.

If I understand you correctly—and based on the link you shared—it seems I need to add a SensorDelegate to enable pairing with a BLE sensor. Is that right? But this is only available in App not datafield ?

I hadn’t considered that approach because the data field sample in SDK 8.3.0 doesn’t appear to use it, so I wasn’t looking in that direction.

I’ll give it a try and keep you posted. Thanks a lot for the lead!

Edit : quick question but does BluetoothLowEnergy.pairDevice() in an app is enough to use the sensor for future use in a datafield or do you have also to do RequestBond() on the device ?

I got my hands on another garmin and the datafield work fine on a Fenix 8 47mm with API leve 5.2.0 and system 8.

Can someone explains or give an hint on why it's stopped working on the vivoactive 5 after the watch firmware update ?

Why? The announcement uses the word "can", not "needs", it sounds to me optional

From the tests i've been running with the Fenix 8, it doesn't need it indeed, even on datafields. My new hypothesis is that Garmin "broke" the vivoactive 5 (easy to say...) so what can i do now ? is there a way to have any kind of support or infos from the garmin team ?