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Add robust and reliable proximity identification to your projects with the EM-18 RFID Reader Module, a compact and highly popular 125kHz serial RFID reader. This module is an essential component for building a wide range of applications, including access control systems, RFID-based attendance solutions, automated security systems, and various robotics and embedded projects. Its simplicity and straightforward interface make it an ideal choice for both beginners and experienced makers.

The EM-18 module operates at a low frequency of 125kHz and is designed to read the unique identification numbers from EM4100-compatible RFID tags and cards. With a typical read range of 5 to 10 cm, it provides reliable non-contact data acquisition without the need for line-of-sight. A key feature of the EM-18 is its integrated antenna, which simplifies your design by eliminating the need for an external one.

Interfacing the EM-18 with your microcontroller is exceptionally easy. It provides a standard TTL-level serial (UART) output with a baud rate of 9600 bps, allowing you to connect its TX pin directly to the RX pin of an Arduino, ESP32, or Raspberry Pi. When a compatible RFID tag is brought into the reader's field, the module automatically reads the unique 12-byte ID and outputs it as a serial string. This data can be easily captured and processed by your code to trigger events such as unlocking a door, marking attendance, or controlling a device. With a low current consumption of less than 50mA and a compact form factor, the EM-18 RFID Reader Module is a power-efficient and space-saving solution for bringing wireless identification to your next innovative project here in Pune, Maharashtra, India.

The EM-18 RFID Reader Module operates at 125kHz frequency and is capable of reading RFID tags and cards based on the EM4100 standard. When a valid tag is brought within range (3–10 cm), the module transmits the tag’s unique 12-digit ID via UART (TTL or RS232).