Storing data (Recieved by nRF Toolbox Android App via UART) in a CSV file.

[Samiulhaq]

Hello Nordic family, I hope everyone is fine. 

I want to do modifications to the nRF Toolbox android App such that the data received by the nRF Toolbox android App from the peripheral (nRF52840 DK) via UART can be saved in a CSV file. The current version of the nRF Toolbox App only shows the received data in the log but I want to store the received data in a CSV file. I am new to App development and I just run the source code of the nRF Toolbox App from GitHub in the Android Studio, I have successfully got the app on the mobile and it is working properly. Now I want to do modifications to the App's source code to store the UART data in the CSV file. But I don't know how to do this. Can someone please help me in this regard? 

Best Regards,

Sami

[Amanda Hsieh]

Hi, 

I am checking with the app team and will update the case later. 

Regards,
Amanda H.

[Samiulhaq]

Hey Amanda, thanks for your reply.

Okay sure, please update the ticket once you discuss it with the app team.

Best Regards,

Sami

[Sylwester Zielinski]

Hello,

Data are collected using BLE in ViewModel in profile_uart module:

https://github.com/NordicSemiconductor/Android-nRF-Toolbox/blob/main/profile_uart/src/main/java/no/nordicsemi/android/uart/viewmodel/UARTViewModel.kt#L70

In the Flow you will receive Bluetooth statuses like: ConnectingResult, ConnectedResult, SuccessResult... and SuccessResult contains inside a field with all messages. SuccessResult can be sent multiple time, one for each message send or received.

So inside the flow you may need to do sth like that:

(it as? SuccessResult)?.let { result ->
   val incomeMessages = result.data.messages
   //save $incomeMessages to CSV now or later
}

In this list you will have messages which were sent and received from the device. Just check type field of each message.

How to store the values in CSV is up to you. You may look for some Android libraries on Github.

Regards,

Sylwester Zieliński

[Samiulhaq]

Hey Sylwester Zieliński, thanks for the quick help.

Sylwester Zielinski said:

Data are collected using BLE in ViewModel in profile_uart module:

https://github.com/NordicSemiconductor/Android-nRF-Toolbox/blob/main/profile_uart/src/main/java/no/nordicsemi/android/uart/viewmodel/UARTViewModel.kt#L70

I am using/playing with a slightly lower version(3.1.2) of the nRF Toolbox app from GitHub so I didn't find the location you pointed me to, can you please refer me to this location in the 3.1.2 release of the nRF Toolbox app?. Also, please paste the code and library for generating CSV files and storing UART data in it as I am totally new to kotlin and app development and don't how to do it.

Thanks & Best Regards,

Sami

[Samiulhaq]

**Updates:

Sylwester Zielinski said:

Data are collected using BLE in ViewModel in profile_uart module:

https://github.com/NordicSemiconductor/Android-nRF-Toolbox/blob/main/profile_uart/src/main/java/no/nordicsemi/android/uart/viewmodel/UARTViewModel.kt#L70

Yes, I found this location in Android Studio. 

Sylwester Zielinski said:

So inside the flow you may need to do sth like that:

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(it as? SuccessResult)?.let { result ->

val incomeMessages = result.data.messages

//save $incomeMessages to CSV now or later

}

XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

(it as? SuccessResult)?.let { result ->
   val incomeMessages = result.data.messages
   //save $incomeMessages to CSV now or later
}

In this list you will have messages which were sent and received from the device. Just check type field of each message.

How to store the values in CSV is up to you. You may look for some Android libraries on Github.

Can you please refer me to a code snippet/library etc where they have implemented the logic of generating CSV files and storing data in it using kotlin language, I am totally new to kotlin and app development and don't how to do it. Your help will be highly appreciated.

Best Regards,

Sami