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42 lines
3.1 KiB
Markdown
42 lines
3.1 KiB
Markdown
---
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title: Image QR Scanner
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hide_title: true
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---
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{/*##head##*/}
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# Image QR Scanner
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The **Image QR Scanner** node is used to scane an image for a QR code. It's typically used in conjunction with the [Open File Picker](/nodes/utilities/open-file-picker/) node, to allow the user to upload a file.
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<div className="ndl-image-with-background l">
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</div>
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When a QR code has been successfully identified, the node will send a <span className="ndl-signal">Scan Successful</span> event and the decoded string, otherwise <span className="ndl-signal">Scan Failed</span>.
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{/*##head##*/}
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## Inputs
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| Data | Description |
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| -------------------------------------------- | --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
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| <span className="ndl-data">Image File</span> | The image file to look for the QR code in. Typically provided through an **Open File Picker** node. The input should be of type [File](https://developer.mozilla.org/en-US/docs/Web/API/File) |
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| Signal | Description |
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| ---------------------------------------- | ------------------------------------------------------------------------- |
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| <span className="ndl-signal">Scan</span> | Triggers a QR code scan in the file provided in the **Image File** input. |
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## Outputs
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| Data | Description |
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| --------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
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| <span className="ndl-data">Scan Result</span> | This output contains the decoded string when a QR code has been found and decoded. If no QR code is found this string will be empty. |
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| <span className="ndl-data">Valid Scan</span> | A **boolean** that is **true** if the last scan was valid, otherwise **false**. |
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| Signal | Description |
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| --------------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
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| <span className="ndl-signal">Scan Successful</span> | Sends a signal when a successful scan was done. The resulting scan is on the **Scan Result** output. |
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| <span className="ndl-signal">Scan Failed</span> | Sends a signal when the latest scan failed, i.e. no QR code was found. |
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