How to create a custom services in BLE that sends data over BLE?

[Kabira]

I want to create a custom service in BLE that sends data such as a string Ex. "Hello World..!" mobile app and receive the data from mobile app as well.

[awneil]

https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-services-a-beginners-tutorial

[Kabira]

Thanks Awneil, But I have already explored the tutorials and I am able to create a custom services and characterstics in BLE.

I need to send and receive data using these characteristics. I request you to please share any sample code in which a custom service characteristics sends data over BLE to and from nRF connect mobile APP..

[awneil]

The Characteristics Tutorial does illustrate exchanging data with nRF Connect:

https://devzone.nordicsemi.com/nordic/short-range-guides/b/bluetooth-low-energy/posts/ble-characteristics-a-beginners-tutorial

For a complete application, see The Nordic UART Service (NUS) example:

https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/ble_sdk_app_nus_eval.html

Also the BLE Blinky Application:

https://infocenter.nordicsemi.com/topic/sdk_nrf5_v16.0.0/ble_sdk_app_blinky.html

[Kabira]

Can u please share any example code that illustrate how to exchange data with nRF connect?

I have a string of data to be sent or received over BLE

[awneil]

Have you actually looked at the two examples I just gave you?

One of them certainly does that ...