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Linking NFC Reader value to form in PowerApps

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Posted on by Community Power Pla... Microsoft Employee

Hi all, I've got a bit of a puzzle for you so I will explain the best I can below:

So, I am currently building an app that is supposed to manage assets. A user should be able to scan an assets tag (barcode or NFC) and then they will be taken to the form either, A - Showing them the asset that relates in the pre-populated form view to that tag if the asset is found, or B - If the Asset is not found, navigate to the form view with the NFC/Barcode fields pre-populated with the record that has just been scanned, but everything else empty as the record does not exist.

I managed to achieve this result using the with the Barcode Scanner using this code:

Set(

//varSelected is the variable that is the 'item' property of the form.
varSelected,
LookUp(
Assets,

//'Bar Code' is the column name in the data source.
'Bar Code' = First(Self.Barcodes).Value
)
);
If(
!IsBlank(varSelected),
Set(
varFormMode,
FormMode.View
),
Set(
varFormMode,
FormMode.Edit
);
Set(
varBarcode,
First(Self.Barcodes).Value
)
);
Navigate(ViewAsset_Screen);

Now I need to apply this to the NFC Scanner in a similar fashion, any help would be greatly appreciated 🙂

Categories:

Building Power Apps

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Shaheer Ahmad 2,194 Moderator on at

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To achieve a similar result with an NFC scanner in Power Apps, you can follow a similar approach to the one you used with the Barcode Scanner. Here's an outline of the steps:
Create an NFC scanning functionality: Set up the NFC scanner to read the tag and retrieve the scanned value. You can use the NFC.Scan function to accomplish this. Make sure you have the necessary permissions and configuration set up for NFC scanning in your app.
Use the scanned value to search for the corresponding asset record: After obtaining the scanned value from the NFC tag, you can use it to look up the related asset record in your data source. In your formula, replace First(Self.Barcodes).Value with the NFC scanned value.
For example:

Set( varSelected, LookUp( Assets, NFCScannedValueColumn = ScannedValue ) );

In this example, NFCScannedValueColumn refers to the column in your data source that stores the NFC tag values, and ScannedValue represents the value obtained from the NFC scanner.
Navigate based on the lookup result: Check if the asset record was found based on the lookup result. If a record is found, navigate to the form view showing the existing asset. If no record is found, navigate to the form view with the NFC/Barcode fields pre-populated.

If( !IsBlank(varSelected), Set(varFormMode, FormMode.View), Set(varFormMode, FormMode.Edit); Set(varNFCValue, ScannedValue) ); Navigate(ViewAsset_Screen);

Here, varFormMode is a variable to track the mode of the form (view or edit), and varNFCValue is a variable to store the NFC scanned value for pre-populating the NFC/Barcode fields in the form.
Remember to adapt the code to match your specific data source, column names, and variable names. Additionally, ensure that you have the appropriate permissions and configurations set up for NFC scanning in your app.
This approach should help you achieve the desired functionality with an NFC scanner in your Power Apps asset management app.

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Community Power Pla... Microsoft Employee on at

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Hi Shaheer,

This doesn't seem to work. When the tag is read, it seems to store the identifier value in the variable correctly, but the issue is getting it into the form. When the form is navigated, it just says 'getting your data' and is stuck there. I presume it's something to do with the 'varSelected' element of the formula as the item of the form is 'varSelected'.

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