Z5 compact bluetooth issues - connection drops during data transfer?

[ny75]

I use Polar Flow app to synchronize my training sessions from Polar V800 to the web: 

Polar V800 - bluetooth 4.0 - mobile - https - flow.polar.com

I have upgraded from Z3 compact to Z5 compact. Nothing else changed. 

Since then the synchronization is almost impossible. The syncing process fails after 30-60 seconds every time. If I am lucky the current training session can be uploaded to the mobile after 5-10 attempts. 

Bluetooth HCI snoop log was fine on Z3 compact but not on Z5 compact. Wireshark detected some inconsistencies in the Z5C's bluetooth log: it has been cut short in the middle of a packet. 

So I think the bluetooth connection drops very often during data transfer. 

[Rickard]

I'm sorry to hear that

You may experience stability issues when connecting your Xperia Z5 Compact or your Xperia X to a Polar V800 GPS sports watch. The issue is due to a bug in the bluetooth chip. It will be fixed in the next software release.

Note that software rollouts are a phased process - timings & availability may vary by market/carrier.

[ny75]

Fingers crossed (waiting for the solution since my first post in last November)  

Thanks for the info, Rickard!

[ny75]

Just to be clear: you are suggesting that the next FW release after the current 32.2.A.0.253 will contain thix bluetooth chip bugfix? 

Thx!

[Pepe_K]

Unfortunately, this bug is present in the new firmware 32.2.A.0.253

[ny75]

So, after 11+ months of waiting the current firmware (.305) finally works well with Polar V800. 

Yesterday and today synced daily activities and 2 training sessions with success: bluetooth connection was stable. 

I hope that the next firmwares (Android N) will not ruin this.  

Summary: 

32.2.A.0.305 - OK (2016 Oct)

32.2.A.0.253 - not OK

32.2.A.0.224 - not OK

32.1.A.1.185 - not OK

32.1.A.1.163 - not OK

32.0.A.6.200 - not OK

32.0.A.6.152 - not OK

32.0.A.5.32 - not OK (2015 Oct)