nrf52 DK I2S Data over BLE Integration

[Prasad_2001]

Hello, 
I am using an I2S PDM Mic and trying to send the I2S Data over BLE using Segger Embedded Studio. The I2S Program that I have generated is working ok. I have verified the MIC data on UART Serially. No I have to share the same data over BLE. There is another BLE sample named "ble_app_template" which I used to stream the data over BLE. During the integration of I2S and BLE I came across the error shown in the image. Various other errors were also there from which many of it were resolved by adding headers into correct location.
I am not able to get rid of this one please guide.

Error: "undifined reference to ble_nus_on_ble_evt"

Error image: https://drive.google.com/file/d/1GQuNenNXeixquduDuG20oVLuKHWcQoUV/view?usp=sharing 

[Einar Thorsrud]

Hi,

I am adding your screenshot here to avoid the external service:

I see you get linker errors due to using ble_nus_on_ble_evt though it has not been compiled. So it looks like you have not added components/ble/ble_services/ble_nus/ble_nus.c to the project? That is where this is implemented, and it needs to be added. You also need to set BLE_NUS_ENABLED to 1 in your sdk_config.h.

[Prasad_2001]

Thanks for the reply.
I have added the ble_nus.c to the project. Also I have enabled  "BLE_NUS_ENABLED"(Check the images added).
I ran Rebuild, But still I am getting the same error.

  ->Added to path

-> BLE_NUS_ENABLED

[Einar Thorsrud]

Hi,

Have you added ble_nus.c to the Keil project as well? Can you show that with a screenshot and also upload the full build log so that I can see if it is compiled and if there are any relevant errors?

[Prasad_2001]

Hi, actually I am new in nrf so I don't have much idea about Kiel in this scenario. Please elaborate so I can show you that thing. 
Here I have attached the screenshot of full build>

[Einar Thorsrud]

Hi,

I am sorry for mentionning Keil, I see now you are using Segger Embedded Studio. But the problem is the same, the ble_nus.c file needs to be added to the project. See here for how to add an existing .c file to the project.

PS: Header files are added differently, by adding the path contaning them to the include path:

PSS: If you are startging from scratch, I would advice using the nRF Connect SDK instead of the old nRF5 SDK that you are using now. See nRF Connect SDK and nRF5 SDK statement.