# QR Code reader in UI / Dashboard

**URL:** <https://discourse.nodered.org/t/qr-code-reader-in-ui-dashboard/74668>\
**Category:** General\
**Tags:** node-red-dashboard\
**Created:** [3 February 2023 17:24 UTC](https://discourse.nodered.org/t/qr-code-reader-in-ui-dashboard/74668 "2023-02-03T17:24:48Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Peter](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/peter/32/25135_2.png) [@Peter](https://discourse.nodered.org/u/Peter)\
**Post date:** [3 February 2023 17:24 UTC](https://discourse.nodered.org/t/qr-code-reader-in-ui-dashboard/74668/1 "2023-02-03T17:24:49Z")

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Good evening team!! hope all is well.

I need some advice on QR reader project.

I use a CM4 / Bullseye + rapsi cam with Libcamera ( instead of raspistill)

on the NR side, I'm using ( node-red-contrib-image-tools ), and its works great and get the decoded value from the image on file.( home/pi/qr.jpg) and trigger a new image with exec node and command (Libcamera-still -o qr.jpg).

My Issues:

1- no preview on the LCD screen of the device that is currently in kiosk mode ( [https://localhost:1880](https://localhost:1880/):UI/door1) ... i would like to mimic a qr reader detecting a qr code that the user can see where to point the device/phone presenting/displaying the QR code.

2- the static image capture and retrieve and decode seems a bit slow/sluggish, and I assume a video stream will be faster. I want to do this via NR as I need to use the qr code output data to process in node-red for user authentication. ([GitHub - mebjas/html5-qrcode: A cross platform HTML5 QR code reader. ( https://scanapp.org](https://github.com/mebjas/html5-qrcode))

Your advice will be very helpful.

 ![Screenshot 2023-02-03 at 19.03.57](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/c/7/c7936db7806ddaeffa1e87ab8da860d65dc7868d.png)

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**Author:** ![system](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/1X/d073cd938eafa2e558d7c2cd59003b3ef4963033.png) [@system](https://discourse.nodered.org/u/system)\
**Post date:** [4 April 2023 17:24 UTC](https://discourse.nodered.org/t/qr-code-reader-in-ui-dashboard/74668/2 "2023-04-04T17:24:55Z")

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