Android and BLE connectivity issues

[brinehart]

Hello,

We are currently using a Raytac SoM that has nRF51822 SoC with Adafruit UART firmware. We are running into two different scenarios BLE connectivity issues where the android device:

-will no longer see the the SoM broadcasting unless the android is power cycled

-will not be able to connect for a period unless the android device power cycled

In both of these cases, sometimes resetting the bluetooth controller on the android fixes this and sometimes it doesn't.

We have used the multiple different android devices and have found that some devices frequent these issues more than others. We also found that exact same model androids react differently and worse than others.

Has anyone else seen or experienced this? Are there any phone settings that could be causing the two above issues?

Is there a "best fit" Android device/OS that pairs with nRF51822 SoC?

Any and all advise welcome. Thank you  

[Hung Bui]

Hi Brine, 

To isolate the issue (if it's the issue on the phone or the issue on the Raytak module), could you try testing on a nRF51 development kit. It's a hardware that has been verified by Nordic and can be used as a golden sample. 

Which phone model did you see the issue most often ? 

How did you do the test on the phone, have you used the nRFConnect app ?