topic Re: KW36: OnConnectionState change query in Kinetis Microcontrollers

KW36: OnConnectionState change query

skalyan2 — Thu, 29 Aug 2019 06:25:21 GMT

Hi,

Is it possible like after physical,logical link and profiles gets connected between kw36 and another bluetooth device gets connected, Can the connected peer device(not KW36) disconnect its GATT profile connection ?

If it can disconnect, i have small query :

-->When the link gets disconnected, we will get "gConnEvtDisconnected_c" , similarly will NXP kw36 ble stack will provide any event to application when gatt profile gets disconnected ?

Re: KW36: OnConnectionState change query

stephanie_m — Thu, 29 Aug 2019 22:29:36 GMT

Hello ,

Sorry it is not quite clear which it's your question, could you please help me clarify ? Also, could you provide more details on what are you trying to achieve so I can try to understand in a better way your application?

Regards,

Estephania

Re: KW36: OnConnectionState change query

skalyan2 — Fri, 30 Aug 2019 06:18:17 GMT

Hi Estephania,

I have one third party android mobile application which behaves like:

Once the android mobile app(acts as Central) initiates a connect request to KW36 (Peripheral) and after that android phone initiates a ATT discovery and once it has discovered all the services,characteristics , after that in the third party android application UI, i could see the pop up "GATT disconnected".

My requirement is that i need to get this gatt disconnected event in KW36 , is it possible ?

Will KW36 will know that third party mobile application GATT is disconnected?

Please get back if you got my requirement?

Thanks

Sai Kalyan

Re: KW36: OnConnectionState change query

stephanie_m — Tue, 03 Sep 2019 03:43:04 GMT

Hello,

Sorry for the late reply, we have been under a great load of work.

I can't really guarantee what it's happening in the third party application, still, when developing with Bluetooth LE in Android as far as my investigations went, there are two ways to disconnect a device with two different methods, so I'm not sure which one your mobile application uses.

I believe that what you will need to do or are trying to do it's to create your custom profile, and you are more likely to be looking for the unsubscribe functions in the SDK.

You can check for example the heart rate sensor example and look for the battery service, in the battery_service.c you will find a function called Bas_Unsubscribe.

Could you please check it and let me know if that it's helpful for you ?

Regards,

Estephania