Description
Product Overview
The RDM6300 125kHz RFID Card ID Reader Module is a compact, low-power radio frequency identification module designed to read EM4100-compatible passive RFID cards and tags . Operating at 125kHz, this module serves as a cost-effective solution for integrating RFID functionality into embedded systems, access control devices, and automation projects.
Unlike more complex RFID systems, the RDM6300 simplifies integration with its UART (TTL) serial interface. When an RFID card enters the module’s electromagnetic field, the reader decodes the unique 10-digit ID number and automatically transmits it via the serial port , requiring minimal processing overhead from your host microcontroller.
The module is designed for applications where reliable short-range reading and low power consumption are priorities. It is suited for access control systems, attendance tracking, consumer automation, and any project requiring identification of users or tagged objects.
Key advantages include plug-and-play functionality, compatibility with standard 5V microcontrollers like Arduino, and a proven track record among electronics hobbyists and professionals .
Key Features
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125kHz Operating Frequency: Works with common EM4100 and EM4102 compatible RFID cards, key fobs, and stickers .
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UART Serial Interface: Simple 4-pin connection (VCC, GND, TXD) transmits card ID data directly to your microcontroller .
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EM4100 Protocol Support: Built-in decoding for the standard EM4100 series of read-only RFID tags.
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9600 bps Fixed Baud Rate: Communicates at 9600 baud, 8 data bits, 1 stop bit, no parity (8N1) .
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LED Indicator: Onboard LED provides visual confirmation when a tag is successfully read.
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Compact Form Factor: Small PCB (approx. 38.5mm × 18.5mm) fits easily into enclosures and breadboard layouts .
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5V Compatible: Operates on 5V DC and provides 0-5V TTL serial logic, making it compatible with 5V systems like Arduino Uno .
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External Antenna Support: Includes screw terminals for connecting the included antenna coil.
Technical Specifications
| Parameter | Value |
|---|---|
| Operating Frequency | 125 kHz |
| Supported Cards | EM4100, EM4102, or compatible 125kHz read-only tags |
| Communication Protocol | UART (TTL Level) |
| Baud Rate | 9600 bps |
| Data Format | 8 data bits, 1 stop bit, no parity (8N1) |
| Supply Voltage | 5V DC (±5%) |
| Operating Current | < 50 mA |
| Reading Distance | 2cm – 15cm (depends on tag and antenna tuning) |
| Decoding Time | < 100 ms |
| Module Size | 38.5mm × 19mm × 8.5mm |
| Antenna Size | 46mm × 32mm (included) |
| Operating Temperature | -10°C to +70°C |
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