Gravity: Ring 2D QR Code Scanner – DFROBOT

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C3, R2, I2


Product ID: 20219 SKU: SEN-20219 Categories: , , Tags: , , , ,


This highly integrated QR code scanner with excellent performance can recognize common 1D codes and 2D codes. With a small size, it employs easy-to-connect Gravity Interface and is equipped with a colorful indicator that feeds back the sensor recognition status by showing different colors.

Operating at 3.3V/5V, the scanner is compatible with UART and I2C communication, which makes it easier to develop on controllers like Arduino, ESP32, Raspberry Pi, etc.


  • Use-to-connect Gravity interface
  • 3.3V/5V power supply
  • I2C & UART supported


  • Power Supply: DC3.3V/5V
  • Working Current: <70mA
  • Communication: I2C, UART
  • Image Pixel: 640*480
  • Light Source: colorful indicator/green light flashing prompt successful reading
  • Code System: 1D: EAN13, EAN8, UPCA, UPCE0, UPCE1, Code128, Code39, Code93, CodeBar, Interleaved 2 of 5 // 2D: QR code, Data Matrix, PDF417
  • Depth of Field: QR Code (25mm-150mm product performance may be affected to varying degrees due to barcode quality and environmental conditions)
  • Contrast: ≥25%
  • Reading Angle: roll 360°, pitch 55°, yaw 55°
  • Scanning Angle: 69° (horizontal), 56° (vertical)
  • Reading Accuracy: ≥5mil
  • Working Temperature: 20°C ~60°C
  • Storage Temperature: -40°C ~80°C
  • Environment Light: 0~100000Lux
  • Relative Humidity: 5% to 95% (non-condensing)


  • Self-service vending machines
  • Subway gates
  • Access control
  • Payment machines

Packing List

  • 1  X   Ring 2D QR Code Scanner
  • 1  X   Adapter Board
  • 1  X   PH2.0-4P Dupont Wire 30cm(Red Black Blue Green)




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