DFRobot Gravity 2D QR / Barcode Scanner Ring

The Gravity Ring 2D QR Code Scanner is a compact barcode recognition module designed for embedded systems and automation projects. It supports scanning both common 1D barcodes and 2D QR codes with reliable recognition performance. The module operates at 3.3V or 5V and communicates through UART or I2C interfaces, allowing seamless integration with controllers such as Arduino, ESP32, and Raspberry Pi. Its Gravity connector simplifies wiring, while the built-in RGB indicator provides visual feedback for scanning status. Suitable for smart devices, automation systems, and robotics applications.

Features

- Supports both 1D barcodes and 2D QR code scanning

- High-performance image recognition engine

- Dual communication interface UART and I2C

- Compatible with Arduino, ESP32, Raspberry Pi platforms

- Operating voltage 3.3V–5V

- Integrated RGB status indicator for scan feedback

- Compact ring-style module design

- Gravity connector for simplified wiring

- Fast decoding of printed and screen QR codes

- Stable scanning performance in embedded systems

- Suitable for automation and robotics applications

- Low power consumption design

Specifications

- Operating Voltage: 3.3V – 5V DC

- Supported Code Types: 1D Barcodes and 2D QR Codes

- Communication Interface: UART / I2C

- Indicator Type: RGB Status LED

- Recognition Method: Image Sensor Based Decoding

- Operating Current: ?120 mA

- Module Interface: Gravity 4-Pin Connector

- Scanning Method: Automatic Code Recognition

- Module Type: Embedded Barcode Scanner

- Compatibility: Arduino, ESP32, Raspberry Pi, Microcontrollers

- Operating Temperature: -10°C to 50°C

- Module Dimensions: Approx. 38 × 38 mm

Links

- Product wiki

Schematics

Tutorials

GROW GM60 Stainless Steel LED Control Ring Light UART 1D/2D Bar Code QR Code Barcode Reader Module

- Gravity Ring 2D QR Code Scanner GitHub