I want to send data from sensors to central Android via BLE communication

[y001]

Hello

I am using Android and BLE communication with nRF52832 (BLENano2) now.

I am using SDK 15.0.0 with keil uversion.

Central is Android and peripheral is nRF52832.

Use the SDK "app_ble_blinky"
We were able to write 0x01 to characteristic from Android and send it, and let BLENano2 light and control the LED.

This time, we want to send the value of the accelerometer connected to BLENano2 to Android with BLE and want to check the value on Android.

But what example of the SDK should I use?
I do not know what to refer to.

Please tell me an article that will be helpful to me for BLE communication beginners.

Thank you

[William E.]

When I created my first custom BLE service I followed this guide:

https://github.com/NordicPlayground/nRF5x-custom-ble-service-tutorial

It takes some time but the guide is complete and good for creating your first service.

You can design you service how ever you like but for accelerometer data I suggest that you use notification and serialize the data into an array of values that you then deserialize on the Android side for best performance.

For example a very simple accelerometer service might have a xyz characteristic where you pack a constant number of bits for each x, y, z-axis, depending on the characteristic max length you can then fit many samples into one notification.

On the app-side you can use

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

and modify the Template application to fit your needs.

[y001]

Thank you for reply!
I'll try!