driver to connect nrf52840 with our APP

[Rkidechaa]

Hi Dev Team,

I am developing the weight scale product using nrf52840 development board. We connected the nrf52840 using the nrf connect app ( Provided by nordic).

Now we want to send the data to our APP instead of nrf connect. can you guide me for this ? what kind of driver we need to connect to app.

Thank you in advance.

Rahul Kidecha

[Amanda Hsieh]

Hi Rahul, 

Have a look at our Android BLE Library over at our GitHub. 

Regards,
Amanda 

[Rkidechaa]

Hey Amanda,

Thank you for reply.

I Knew about the Library but I don't have any background regarding software.

If you provide me what command or protocol used to communicate with nrf52840 that would be great.

Thanks and Regards,

Rahul

[Amanda Hsieh]

Hi, 

Rkidechaa said:

If you provide me what command or protocol used to communicate with nrf52840 that would be great.

Could you elaborate in more detail on what you would like to communicate with nrf52840? 

Are you going to developing a mobile app as nRF connect app? If so, you can take a look at this https://github.com/NordicSemiconductor/Android-nRF-Connect for reference.  

-Amanda   

[Rkidechaa]

Hi Amanda,

Amanda Hsieh said:

Are you going to developing a mobile app as nRF connect app? If so, you can take a look at this https://github.com/NordicSemiconductor/Android-nRF-Connect for reference.  

before asking the question i already checked the above link. I don't have any background for app development so if you help to find out the communication or decode protocol when we connect to nrf app connect via Bluetooth.

Thank you

Rahul

[Amanda Hsieh]

Then, I would suggest you take a look at how nRF Blinky app (for Android/iOS) communicates with BLE Blinky Application or nRF Toolbox for Android/iOS, which has multiple profiles (unfortunately no Weight Scale).

-Amanda

[Rkidechaa]

Hi Amanda,

Let me explain you in more detail regarding the project so you can suggest better solution.

Using SPI and ble_app_uart example code we successfully sending the weight scale data that i.e. 192.4 (2 byte data) over Nordic UART service and keep displaying on nrf connect app (android phone).

In ble_app_uart they used "uart_event_handle()"function to detect the input on serial monitor. so i am calling that function and keep sending weight scale data to app.

I want to implement same feature in my app. so could you suggest me how to do that ? 

Thank you

Rahul 

[Amanda Hsieh]

Hi, 

Have a look at the UART app which is now part of the nRF Toolbox application (Android/iOS).

-Amanda

[Rkidechaa]

Hi Amanda,

Thanks for your quick response. I would like to let you know that we are not building the mobile app from scratch. We have an app and trying to integrate this weight scale with nrf52840 sensor to our app. Also, the app development team is recommending us to use the weight scale profile and weight scale service listed in the link below:

https://www.bluetooth.com/specifications/specs/

I tried to attach the files for your reference.

Do we need to create these profile and services to connect to our app? or do you have a pre-existing solution that I can recommend them to use?

Please let me know if you have any questions or concerns.

WSP_V1.0.0 (1).pdfWSS_V1.0.0 (1).pdf

Thanks

[Amanda Hsieh]

Hi Rahul, 

From your previous reply, seems you are using NUS service to transmit data. So, I suggest you refer to nRF Toolbox app which includes NUS profile. If you transmit data via weight scale service, you would need to create these profile and services on your own app. You can verify with nRF Connect to make sure it can read or write over weight scale service before developing your weight scale app.  

As my previous reply, there is no Weight Scale profiles inside our app. You can refer our existing app like nRF Blinky app or nRF Toolbox app to create your own with Weight Scale profiles. 

-Amanda