QR Code Scanner

Extension Description

Detect, identify and read QR codes from images.

Available in: Block Coding, Python Coding
Mode: Stage Mode
WiFi Required: No
Compatible Hardware in Block Coding: evive, Quarky, Arduino Uno, Arduino Mega, Arduino Nano, ESP32, T-Watch, Boffin, micro:bit, TECbits, LEGO EV3, LEGO Boost, LEGO WeDo 2.0, Go DFA, None
Compatible Hardware in Python: Quarky, None
Object Declaration in Python: qr = QRCodeScanner()
Extension Catergory: Other

Introduction

What is QR Code?

QR Code is a machine-scannable image that can be instantly read, using a smartphone camera. Every QR code consists of a number of black squares and dots that represent some encoded piece of information; like alphabets, numbers, etc. When your Smartphone scans this code, it translates that encoded information that only computers can understand, into something that can be easily understood by humans.

The QR Code Scanner extension allows users to scan QR codes from the camera or stage and report the information:

QR Code Data
QR code position on the stage
QR code angle alignment on the stage

Accessing QR Code Scanner in Block Coding

Following is the process to add QR Code Scanner capability to the PictoBlox Project.

Open PictoBlox and create a new file.
Select the coding environment as Block Coding.
Next, click on the Add Extension button and add the QR Code Scanner extension.
You can find the QR Code Scanner blocks available in the project.

Accessing QR Code Scanner in Python Coding

Following is the process to add QR Code Scanner capability to the PictoBlox Project.

Open PictoBlox and create a new file.
Select the coding environment as Python Coding.
Next, click on the Add Modules/Libraries button and add the QR Code Scanner extension.
To access the library functions, you have to add the object declaration.
```
qr = QRCodeScanner()
```

Example Project Video

In this project, a QR code is generated with the help of a QR code generator website. credits – https://www.qr-code-generator.com/

The QR code is linked to a URL. Then, the QR code is scanned with the help of the QR code scanner extension of Pictoblox. The project is created by RS Junction.

PictoBlox Blocks

The turn () video on stage with () % transparency block controls the control the camera feed on the stage.

The block enables or disables the automatic display of the box on the QR code on the stage. This is useful when you want to see if the detection happens or not.

This block analyses the image and saves the QR Code information locally, which can be accessed using other blocks. You have to run this block every time you want to analyze a new image from the camera.