125KHz RFID Card Reader Writer Module Block Data Sector Read And Write For T5557 Chip

A Type: TTL interface

B Type: HID-USB Interface

Product Description

The Dual-Interface RFID Card Reader/Writer is a versatile device designed for seamless interaction with 125kHz low-frequency RFID cards (T5577/T5557). It supports both TTL-232 serial communication Or HID-USB plug-and-play interfaces, making it compatible with a wide range of systems, including embedded projects, access control systems, and PC applications. With a compact design and low power consumption (2.7V–5V), this reader/writer offers reliable performance for reading and programming at distances of up to 7cm.

Key Features:

• Dual interface: TTL (for embedded systems) and HID-USB (driverless PC connectivity).
• Supports T5577/T5557 cards with Manchester RF/64 encoding.
• Long read/write range (3–7cm for reading, 3–6cm for writing).
• Low voltage operation and plug-and-play simplicity.

User Manual

1. Specifications

• Power Supply: 2.7V–5V DC, 30mA
• Operating Frequency: 125kHz
• Supported Cards: T5577 (ATA5577), T5557
• Coding Format: Manchester RF/64
• Read Distance: 3–7cm
• Write Distance: 3–6cm

2. Interfaces

A. TTL Interface (Serial Communication)

• Protocol: TTL-232 (3.3V or 5V logic compatible).
• Baud Rate: 115200
• Data Format: 8 data bits, no parity, 1 stop bit (8N1).
• Usage: Connect via TTL-to-USB adapter or directly to microcontrollers (Arduino, Raspberry Pi, etc.).

B. HID-USB Interface

• Protocol: USB-HID (Human Interface Device).
• Driverless Operation: Recognized as a keyboard or HID device by most operating systems.
• Usage: Plug-and-play via USB port for PC applications.

3. Package Contents

• RFID Reader/Writer Module (interface type: TTL or HID-USB as ordered).
• Optional Accessories:
  • USB-HID or USB-TTL cable (purchased separately).
  • Note: Card read/write module is NOT included.

4. Wiring (TTL Interface)

• Pinout:
  • VCC: Connect to 2.7V–5V power source.
  • GND: Ground connection.
  • TX: Transmit data to host.
  • RX: Receive data from host.

5. Communication Protocol (TTL Mode)

• Data is transmitted in ASCII format via serial port.
• Example card read output: [Card UID] 00 12 AB 34 56 (hexadecimal format).
• Commands for writing cards must follow Manchester RF/64 encoding standards.

6. Usage Guidelines

• Reading Cards: Hold the card within 3–7cm of the reader. Data will auto-transmit via TTL or HID-USB.
• Writing Cards: Use dedicated software (e.g., RFID programming tools) to send commands via TTL serial or USB. Ensure the card is within 3–6cm during writing.
• Power: Do not exceed 5V input to avoid damage.

7. Applications

• Access control systems.
• RFID card cloning/management.
• Embedded IoT projects.
• Time attendance tracking.