DFRobot
GM73 Barcode & QR Code Scanning Module
The GM73 is a high-performance barcode and QR code scanning module capable of reading common 1D and 2D codes from labels, paper, and screens in approximately...
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The GM73 is a high-performance barcode and QR code scanning module capable of reading common 1D and 2D codes from labels, paper, and screens in approximately 1 second. It uses advanced smart image recognition and decoding algorithms for fast, accurate scanning.
With onboard Micro USB and UART (TTL-232) interfaces, the module is easy to embed into custom projects. Parameters can be configured by scanning setup codes, simplifying integration and reducing development time.
Key Features
- Smart Image Recognition – Advanced decoding algorithms for fast, accurate reads
- 1D & 2D Code Support – Reads barcodes, QR codes, Data Matrix, PDF417, and more
- Fast Capture – Approximately 1-second scan speed
- Dual Interface – Onboard Micro USB and UART (TTL-232)
- Compact Size – Just 30 × 24 × 7mm for easy embedding
Specifications
- Sensor: 640 × 480 CMOS
- Illumination: White LED
- Focus Indicator: Red LED
- 1D Codes: EAN, UPC, Code 39, Code 93, Code 128, UCC/EAN 128, Codabar, Interleaved 2 of 5, MSI-Plessey, GS1 Databar, Code 11, Industrial 25, Standard 25, Matrix 2 of 5
- 2D Codes: QR Code, Data Matrix, PDF417
- Reading Accuracy: ≥5mil
- Depth of Field: 30–150mm
- Scanning Angle: 360° intersection, ±55° elevation and deflection
- Interface: TTL-232, USB
- Operating Voltage: 5V DC
- Operating Current: ≤180mA
- Ambient Light: 0–10,000 lux
- Operating Temperature: −20°C to 50°C
- Dimensions: 30 × 24 × 7mm
Ideal For
- Self-service vending machines and kiosks
- Access control and gate systems
- Checkout counters and POS systems
- Inventory management and asset tracking
Package Contents
- 1× GM73 barcode & QR code scanning module
- 1× USB cable
- 1× TTL adapter
Jargon buster
Plain-language definitions for the technical terms used above.
- DC
- DC means direct current, where electricity flows in one constant direction, as supplied by batteries, USB ports and many plug-pack power supplies. When a product specifies DC, it runs from a DC supply rather than mains AC, so you need to provide the correct voltage and polarity.
- LED
- A light-emitting diode (LED) is a small electronic component that emits light when current flows through it in the correct direction. Because it only conducts one way, its polarity matters, and a through-hole LED must be soldered the correct way around to light up.
- lux
- Lux is the standard unit for measuring how much light falls on a surface, similar to how a light meter reports brightness. A sensor that outputs lux gives readings that are easier to compare between rooms, outdoor conditions, and different projects.
- UART
- UART is a simple asynchronous serial interface that sends data over separate transmit and receive wires, usually labelled TX and RX, with both ends set to the same baud rate. It is a common way for microcontrollers and other serial devices to exchange data.
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