EM18 RFID Reader

RFID(Radio Frequency Identification) is a form of wireless communication that incorporates the use of electromagnetic coupling in the radio frequency portion.
RFID reader is a device used to gather information from an RFID tag which can further used for various apllications which include e-payment, e-toll road pricing, e-ticketing for events/public transport, access control, authentication.
Okay! Now let’s see how to read RFID tag using EM18 RFID reader and USB to TTL(CP2102)!

Table of Contents

• Documentation
• Prerequisites
• Connection Diagram
• Getting Started
• Implementation
• Contributions

Documentation

It is highly recommended to go through the Documentation first.
Here is direct link for same.

• Datasheet

Prerequisites

• Realterm or any other serial terminal
• USB to TTL (CP2102)
• EM18 RFID Reader Module
• Jumpers
• Basic knowledge of UART and serial communication

Connections

(Application Circuit referred from EM18 RFID reader Datasheet)

• Tx(EM18 RFID Reader) ---> Rx(USB to TTL)
• Power Supply (5V and GND)
• SEL pin ---> 5V

Getting Started

Follow the steps for getting started:

• Connect the USB to TTL(CP2102) to USB port of PC and open device manager to check the port connected to serial bridge (USB to TTL).
  
• Open Realterm or any other serial terminal you want to use.
• Open the port to which your serial device is connected make sure to check serial configuration as follows:
  Baudrate : 9600
  Data Bits : 8
  Parity : None
  Stopbits : 1
  
• That's it!!! Now you can tap RFID tag and see it on realterm directly.

Implementation

Contributions

For reporting any technical issue or proposing new feature, please create new issue.