Frequent connection and disconnection every 30 seconds on Android 8.0 and above

[KrishNa]

Hello everyone,

We are building a wearable that uses nrf51822 chip. We are facing a specific issue of connection and disconnection every 30 seconds with Android devices running OS 8.0 and above.

We are not facing similar issue with the Android devices running OS nougat and iOS devices and the connection is pretty stable.

Please help us to resolve this issue at the earliest.

Best,

Krish

[MartinBL]

Hi,

30 seconds is a typical connection timeout interval. So if it is exactly 30 seconds every time it indicates that something breaks the link, the phone waits for packets from your nrf51822 for 30 seconds, and then disconnects. 

I can't tell you what is wrong without more details though. 

1. Do you get any error logs out of the nrf51822 or the phone?
2. Have you debugged your application?
3. Can you provide a sniffer trace? If you have a Nordic kit to spare you can use our nRF Bluetooth Sniffer solution.