How to send data from nordic nrf52840 to BLE android app nrfConnect?

[Rajat]

Hi everyone,

First of all ,Thanks for being such a supportive forum, I ask a lot of questions(I am a beginner to nordic and BLE)

I am using the example given in the sdk named "ble_app_uart" which emulates UART on the nrf Connect App.

I am able to receive the data and print the data onto the serial terminal from the android app ,nrFconnect.

But my aim is to achieve both sides communication in which i want to send some data from the microcontroller to the android app.

The sample code uses a function nus_data_handler but it does so only to print the received data to serial terminal.

Is there any function to achieve this objective?

What is the process i need to follow?

Thanks 

Rajat!.

[Simon]

In order to send messages from the microcontroller to the app you need to use the following function:  

ble_nus_string_send(&m_nus, data, sizeof(data))

Here are some links that shows how to use the function:

https://devzone.nordicsemi.com/f/nordic-q-a/27207/sending-number-over-ble-with-ble_nus_string_send#post-id-176984

https://devzone.nordicsemi.com/f/nordic-q-a/30545/how-to-use-ble_nus_string_send-correctly

Best regards Simon Iversen