Sending data to particular central among multi centrals

[P Sumanth]

Hey

I have connected multiple centrals to one peripheral using multi peripheral program and tried to send data from peripheral to centrals, it worked. Now i want to send data to particular central either using MAC address or name of it among all centrals, Right now i have connected 3 centrals, Data should be sent to only 1 central with out affecting others. Please let me know how can i do this, where should I modify the program in multi peripheral.

Regards

Sumanth  

[Andy]

You just have to pass the appropriate connection handle to the sd_ble_gatts_hvx() function.

[P Sumanth]

HOw can we know the connection handle of device and also can we send different data to different centrals?

[Andy]

With p_ble_evt->evt.gap_evt.conn_handle, in case you don't know how.

[P Sumanth]

Hey thanks for reply

Since I am connecting to multiple devices how can i store each connection handle and send data to it.

regards

sumanth

[awneil]

In an array ?

[P Sumanth]

Ok i will work on it and let you know

Regards

sumanth

[P Sumanth]

Hey i found it, now i am able to send data to particular central.

I have one more task to do i.e how can i send string or extra integer data when i press a button from one device and receive at other device. Do i need to add any new characteristic or use button characteristics or any other way with some clear idea?

Regards

sumanth

[Andy]

That's application specific. You can do it however you want - you can create a new characteristic or use an existing one. It depends on what you want to do.

[P Sumanth]

how can i create a new characteristic with UUID, properities etc? 

[Andy]

devzone.nordicsemi.com/.../ble-characteristics-a-beginners-tutorial

[ps_anu]

how you have done ??? can you send the code... i also want to do same thing ,want to send the data to peripheral device

[awneil]

ps_anu said:

want to do same thing ,want to send the data to peripheral device

But that's not the same thing at all: the thread title is, "Sending data to particular central..." - it's about sending to the central; not sending to a peripheral!

Start a new thread for a new question!

But first, take a look at the BLE examples in the SDK:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/examples_ble.html

think which of those most closely matches your requirements.

The Nordic UART Service (NUS) is good for sending arbitrary data:

https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v15.3.0/ble_sdk_app_nus_eval.html