> **Source:** Core Electronics is an Australian maker-electronics retailer and manufacturer based in Newcastle, NSW, run by a team of makers and educators. We design and manufacture our own product lines (PiicoDev, CE originals) and are official retailers for iconic maker and industrial brands including Raspberry Pi, Arduino, Adafruit, SparkFun and DFRobot. Orders ship Australia-wide from our Newcastle warehouse. Prices are in AUD and include GST. Pricing, stock and dispatch on this page are generated from the store's live catalog. Full machine-readable index: https://core-electronics.com.au/llms.txt

# GM77 Barcode and QR Code Scanning Module

**Type:** Product page · **SKU:** SEN0512 · **Brand:** [DFRobot](https://core-electronics.com.au/brands/dfrobot-australia)
**Page:** https://core-electronics.com.au/gm77-barcode-and-qr-code-scanning-module.html ([markdown](https://core-electronics.com.au/gm77-barcode-and-qr-code-scanning-module.html.md))

This scanning module reads bar codes or 2D codes with scan speed of 15m/min. With small size and high-efficiency recognition, it is easy to be integrated...

## Pricing

- **Price:** $91.15 (inc GST) — $82.86 AUD, exc GST
- **Quantity discounts:** 6+ $78.72 (exc GST) · 12+ $75.41 (exc GST)

## Availability & dispatch

- Available with a lead time — expect dispatch between Oct 05 and Oct 08.

## How to buy

- **Build a cart:** compose `https://core-electronics.com.au/cart/link?items=SEN0512:1` (comma-separated SKU:qty pairs) and share the link. Opening it shows a confirmation page with live pricing and stock before anything is added to the cart.
- **Verify the cart first:** fetch `https://core-electronics.com.au/cart/link/SEN0512:1.md` for live line prices (inc & exc GST, quantity discounts applied), stock and dispatch estimates, and totals. Append `/to/{AU-postcode}` (or `/to/{country-code}:{postcode}`) before `.md` for delivery options and prices to that destination. Unknown, retired, or out-of-stock SKUs are flagged. (Query form `cart/link.md?items=...` also works but some robots parsers refuse query strings here.)
- **Checkout** is completed on-site and includes a captcha at the payment step. Share the cart link; checkout takes it from there.
- **Search the catalogue:** `https://core-electronics.com.au/search/{query}.md` (URL-encode the query; pages 2-3 at `search/{query}/{page}.md`; `search.md?q=` also works)
- **Payment methods, purchase orders, policies and contact details:** https://core-electronics.com.au/llms.txt
## Description

This scanning module reads barcodes or 2D codes with a scan speed of 15m/min. With small size and high-efficiency recognition, it is easy to be integrated into various industrial equipment and applications.

The module is equipped with a 0.3megapixel camera and auxiliary lights, white light illumination, and red light focusing, which makes it able to effectively identify codes in low-light environments.

The module automatically senses and scans, identifies the surrounding environment. Once being auto-triggered, it quickly recognizes and reads code. The scanner also has TTL-232 and USB two communication interfaces for more actual scenarios.

It uses CMOS image recognition and core decoding algorithms to quickly recognize various barcodes and QR codes. Plug and play, no need to install drivers. The module is compatible with many mainstream operating systems such as Windows, Linux, Android, and Mac.

In addition to recognizing ordinary QR codes and barcodes, it can also recognize laser codes and other high-density code systems, which is applicable to various embedded environments such as mobile payment, access control, and self-service shopping.

###  Features

7. Small size
8. High-efficiency recognition
9. Automatically senses and scans
###  Applications

11. Mobile payment
12. Access control
13. Self-service shopping
###  Specification

15. Sensor: 640\*480 CMOS
16. Illumination: White LED
17. Focus: Red LED
18. Support 1D code types: EAN, UPC, Code 39, Code 93, Code 128, UCC/EAN 128, Codabar, Interleaved 2 of 5, ITF-6, ITF-14, ISBN, ISSN, MSI-Plessey, GS1 Databar, Code 11, Industrial 25, Standard 25, Plessey, Matrix 2 of 5
19. Support 2D code types: QR Code, Micro QR, Data Matrix, PDF417, Mrico PDF417, Aztec
20. Reading Accuracy: =4mil
21. Reading Depth of Field: EAN-13: 50mm- 200mm (13mil); Code39: 40mm 90mm (5mil 10 bytes); QR Code: 25mm- 200mm (20mil 16 bytes); Data Marix: 50mm- 90mm (10mil 20 bytes) ); PDF 417: 30mm- 120mm (6. 67mil 7 bytes)
22. Scanning Angle: rotation angle 360°, elevation angle ±55°, deflection angle ±55°
23. Field of View: 47° (horizontal), 36° (vertical)
24. Contrast: =25%
25. Communication Interface: TTL-232, USB (HID-KBW, virtual serial port)
26. Size: 48.5\*27.5\*14mm/1.91\*1.08\*0.55 inch
27. Working Voltage: DC 5V
28. Working Current: 180mA
29. Standby Current: USB: 50mA; TTL: 10mA
30. Ambient Light: 0~100000lux
31. Working Temperature: -20°C ~ 50°C
32. Storage Temperature: -40°C ~ 70°C
33. Working Humidity: 5%~95% (non-condensing)
###  Parts List

35. GM77 Barcode & QR Code Scanning Module x1
36. USB Adapter Cable x1
37. TTL Adapter Cable x1

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/i/m/image_12374.jpg)