Description:
The QR204 is a professional-grade "embedded" printer, meaning it is designed to be mounted inside another device rather than sitting on a desk. It utilizes direct thermal technology, which uses heat to "draw" on the paper—eliminating the need for expensive ink or ribbons. Its standout feature is the Front-Panel Loading mechanism; the front door flips open, allowing users to drop in a new paper roll in seconds without accessing the back of the machine. This makes it ideal for public-facing terminals where maintenance speed is critical.
Features:
Dual Connectivity: Integrated with both a 5-pin TTL serial port (for microcontrollers) and a standard Mini-USB port (for Windows/Linux/Android).
Industrial Reliability: Rated for a printing life of 50 km or 500 million lines (MCBF).
Ultra-Quiet Operation: Uses low-noise thermal dot matrix printing, ideal for quiet environments like hospitals or libraries.
ESC/POS Compatible: Supports the industry-standard command set, allowing it to print text, graphics, barcodes, and QR codes easily.
Front Loading Design: A simple latch on the front panel provides easy access to the paper compartment.
Wide Voltage Support: Operates on 5V to 9V DC, though 9V is recommended for the crispest, darkest print quality.
Specifications:
Model: QR204 (TTL + USB)
Color: White
Printing Method: Direct Thermal Line Printing
Resolution: 203 DPI (8 dots/mm)
Effective Print Width: 48 mm
Printing Speed: 50–85 mm/s (Voltage dependent)
Paper Type: Standard Thermal Paper
Paper Width: 58 mm (±0.5 mm)
Max Roll Diameter: 30 mm
Interfaces: TTL (UART) + USB
Power Supply: DC 5V–9V (Peak current ~2A)
Supported OS: Windows, Linux, Android, iOS
