How to receive and transfer data using custom ble service

[HPD]

Hi, I am using a system where I am using nrf52832 nordic chip. I generate a custom ble service using this ' https://github.com/bjornspockeli/custom_ble_service_example ' github tutorial. Now I want to receive and transfer data (sensor data) from or to a android phone which will be connected to the nrf device using the  ble service and want to read the data. So please help me how can I develop the system.

[awneil]

Android app development is outside the scope of this forum - you will need to study the Android developer documentation, and visit Android developer forums

https://developer.android.com/guide/topics/connectivity/bluetooth-le

There are some examples in the Nordic GitHub:

https://github.com/NordicPlayground

https://github.com/NordicSemiconductor/Android-BLE-Library

https://github.com/NordicSemiconductor/Android-nRF-Toolbox

https://devzone.nordicsemi.com/f/nordic-q-a/9681/nrf52-android-app-source-code

[HPD]

I am not asking about the android app development. I am asking about how can I send or receive data through ble connection. I just want an example code.

[awneil]

Sorry - that wasn't clear.

Steps 6 & 7 of that tutorial describe how to handle stuff coming from the Central;

Step 8 describes sending stuff coming to the Central.

The whole point of BLE is to transfer data between Peripheral & Central - so all of the SDK BLE examples illustrate that in one form  or another:

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

For transferring arbitrary data, take a look at the Nordic UART Service (NUS) - which is, in itself, an example of how to do custom services & characteristics:

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

Note that none of this is specific to the Central being Android.