mirror of
https://github.com/noodlapp/noodl-docs.git
synced 2026-01-12 07:12:53 +01:00
656e5fc8d2
* chore: Upgrade Docusaurus from v2 to v3 * chore: Update "Test build" GH workflow * fix: build All markdown is processed as MDX * fix: Broken links
45 lines
3.8 KiB
Markdown
45 lines
3.8 KiB
Markdown
---
|
|
title: Camera QR Scanner
|
|
hide_title: true
|
|
---
|
|
|
|
{/*##head##*/}
|
|
|
|
# Camera QR Scanner
|
|
|
|
The **Camera QR Scanner** node is used to open the camera view finder and scan for QR codes. It uses a [Video](/nodes/basic-elements/video) node to display the camera stream.
|
|
|
|
<div className="ndl-image-with-background l">
|
|
|
|
|
|
|
|
</div>
|
|
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>.
|
|
In this node, the decoding happens in real time, meaning if the QR code is not visible anymore the node will send an event to indicate that the scanning failed.
|
|
{/*##head##*/}
|
|
|
|
## Inputs
|
|
|
|
| Data | Description |
|
|
| ------------------------------------------------------ | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
|
|
| <span className="ndl-data">Video Node</span> | This input should be connected to the **Dom Element** output of the **Video** node that's used render the camera view finder. |
|
|
| <span className="ndl-data">Front Facing</span> | A **boolean** that decides if the front facing camera should be used (default) or the user facing came. |
|
|
| <span className="ndl-data">Max Scans Per Second</span> | The number of scans per second the scanner will do to find QR codes. Lowering this number may improve performance if needed. Note that changing this number after triggering **Start** will have no effect. |
|
|
|
|
| Signal | Description |
|
|
| ----------------------------------------- | --------------------------------------------------------- |
|
|
| <span className="ndl-signal">Start</span> | Opens the camera stream and starts scanning for QR codes. |
|
|
| <span className="ndl-signal">Stop</span> | Stops the camera stream and stops scanning for QR codes. |
|
|
|
|
## Outputs
|
|
|
|
| Data | Description |
|
|
| --------------------------------------------- | ------------------------------------------------------------------------------------------------------------------------------------ |
|
|
| <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. |
|
|
| <span className="ndl-data">Valid Scan</span> | A **boolean** that is **true** if the last scan was valid, otherwise **false**. |
|
|
|
|
| Signal | Description |
|
|
| --------------------------------------------------- | ---------------------------------------------------------------------------------------------------- |
|
|
| <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. |
|
|
| <span className="ndl-signal">Scan Failed</span> | Sends a signal when the latest scan failed, i.e. no QR code was found. |
|