I am using XperiaZ 5 Preremium E6853.
-Model number E6853
-Product ID *personal info removed*
-Android version 7.0
-Baseband version 8994 - FAAAANAZQ - 0059 - 35
-Kernel version 3.10.84-perf-g1016077
-Build number 32.3.A.2.33
I upgraded Android version to 7.0 and the following symptoms came to appear.
This is the behavior when data of about 36 kB is transferred while using peripheral devices compatible with Bluetooth Low Eenergy. During the data transfer, the value of Connection interval suddenly changes from 48.5 ms to 7.5 ms, and "Service Search" starts further.
Here, the peripheral device causes an error and communication stops.
I will simply describe behaviors.
1. Connection completed.
2. Service Seacrh completed.
3. Start to transmit data.
4. After it was transmitted about 4kbytes, Xperia change "Connection interval" from 48.5ms to 7.5ms.
5. "Service Search" starts further.
6. communication stops.
I do not know if this is behavior as specified.
(I checked the packet with the Bluetooth protocol analyzer and grasped the behavior of the Xperia Z5.)
Is there anybody who knows whether there is " Bluetooth BUG" in XperiaZ5(Android7)?
Is there anyone who knows how to solve it?
This peripheral device works well with other phones such as Nexus5X(Android7) .
Thank you for your reply.
