What is a QR Code? Applications in eSIM, IoT, and digital communication

What is a QR Code?

A QR code (Quick Response code) is a two-dimensional barcode that can be quickly read by the cameras of smartphones, tablets, and industrial scanners. Originally developed for the automotive industry in Japan, it has become a universal method for quickly and accurately sharing information.

A QR code can contain a variety of data, such as URLs, contact details, Wi-Fi settings, or device configurations. In the world of connectivity and IoT, QR codes are increasingly used for eSIM activation, device registration, and fast data exchange.

How Does a QR Code Work?

A QR code consists of a matrix of black and white squares that encode information in rows and columns. A camera or scanner reads this matrix and converts the pattern into digital information.

Advantages of QR codes:

• Fast scanning without manual input
• Compact and printable on paper, packaging, or screens
• High capacity: Can store hundreds of characters
• Error correction: Still works even if the code is partially damaged

QR Codes and eSIM Activation

In eSIM technology, a QR code is used to download and activate an eSIM profile. Instead of inserting a physical SIM card, the user scans a QR code that links to a profile on an eSIM platform.

Benefits of QR-based eSIM activation:

• Rapid setup of mobile network connections
• No physical SIM card required
• Ideal for mass deployment of IoT devices
• One code per device or automated via APIs

The QR code contains, among other things, the SM-DP+ address and activation data needed to configure the eSIM profile on the device.

Applications of QR Codes in IoT and Automation

• eSIM installation on routers, trackers, and modems
• Configuration links for devices deployed in the field
• Fast access to web interfaces of IoT devices
• Linking installation manuals or user info to hardware
• Secure product or user registration

QR codes are also used in combination with asset tracking, where a QR code on a physical object provides access to current location or status information.

Security and Management

Although QR codes are simple to use, it’s important to implement proper security measures:

• Use unique, generated codes for sensitive applications
• Only link via secure HTTPS connections
• Set expiration or authentication levels for QR codes
• Combine with user authentication or verification during activation

More Information

Interested in using QR codes for eSIM activation in your IoT project? Thingsdata supports the generation, management, and implementation of QR codes in combination with connectivity solutions, hardware, and eSIM platforms.

Contact us at  +31 (0)85 0443500 or info@thingsdata.com, or explore our eSIM products in the Thingsdata webshop.