RFID EM18 Module

RFID is an abbreviation for “Radio-Frequency Identification” and refers to a technology whereby digital data encoded in RFID tags are captured or identified by a reader via radio waves. One of the most common RFID EM18 is used with microcontrollers. Don’t worry we will see RFID SYSTEM, WORKING MECHANISM and Interfacing of EM18 RFID with Arduino in our next topics after having some knowledge of it.

EM18 RFID READER MODULE PINOUTRFID tags have similar applications to barcodes in that (barcodes) data from a tag are captured by a device that stores the data in a database. RFID, though, has more than a few advantages over barcode asset tracking software. Most importantly data of the RFID tag can be read outside the LOS (line-of-sight), whereas barcode stickers must be made straight against an optical scanner to decode/read.

EM18 RFID PIN CONFIGURATION

EM-18 is a nine pin device. Among nine pins, 2 pins are not connected, so we basically have to consider seven terminals.

Pin Number

Description

VCC

Connect to the positive of power source.

GND

Connected to ground.

BUZZ

Connect to BUZZER if used

NC

No Connection

NC

No Connection

SEL

SEL=1 then o/p =RS232

SEL=0 then o/p=WEIGAND

TX

DATA send through TX using RS232 communication

DATA1

WEIGAND interface DATA HIGH pin

DATA0

WEIGAND interface DATA  LOW pin

EM18 SPECIFICATION

  • Operating  voltage of EM-18: +4.5 V to +5.5 V
  • Current consumption: Less than 50 mA
  • Can operate on LOW power
  • Operating temperature: 0 ºC to +80 ºC
  • Operating frequency:125 KHz
  • Communication parameter: 9600 bps
  • Reading distance: 10 cm, depending on TAG
  • Integrated Antenna

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RFID SYSTEM


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