BLE connection problem

[DragonAnger]

Hi,

I'm using sdk12.3.0 ble_app_uart.

My problem is BLE connection.

Sometimes(almost 50%)I tried to connect BLE but fail and I have to connect again.

I don't know why.

This image is messages that I captured when connection failed.

What is the problem?

Thank you for reading my question!

[endnode]

Mobile phone is kind of black box when it comes to BLE so all logging and indications you get are indirect. If you really want to know which peer disconnected, when and probably why you need RF trace from BLE sniffer or similar network analyzer.

[Sigurd]

Hi,

A quote from this thread on a similar issue (Device is not supported message).

I suspect the android device is still not making full device discovery for the services and still has an old gatt table with services that you previously bonded with. Try to go into Bluetooth settings on your phone, forget all bluetooth services/devices that you have listed there and perhaps disable Bluetooth and enable it again. Then try to connect with the nRF52 device.

[DragonAnger]

I want to find way without those devices right now. But Thank you for your answer!

[DragonAnger]

Thank you for your answer Sigurd! I'll check it and let you know.

[DragonAnger]

Hi Sigurd,

I checked the thread.

I suspected that android has cached previous services from the device.

So, I tried this but didn't work.

Is there other way to clear service cache or anyone solve this problem?