µRFID Reader (EM-18 compatible)

EM-18 RFID reader is one of the commonly used RFID reader to read 125KHz tags. It features low cost, low power consumption, small form factor and easy to use. It can interact with a microcontroller in any one of the two supported protocols namely TTL Serial & Wiegand 26 as per the system design. µRFID reader also has a detection pin (BUZ) that could be used to simply detect a valid RFID card.

Features

  • Operating voltage range 3.3V to 5.5V
  • Operating frequency 125kHz
  • Current Rating < 50mA
  • Reading distance 10–15 cm
  • Communication parameters 9600bps, 8-N-1
  • Supports Tags which work at 125kHz
  • TTL serial & Wiegand 26 Interface
  • 100% EM-18 RFID reader module compatible (Hardware & Software)

Pin Layout

Pin Description

Output Formats

  • TTL Serial
    • When a high value is sent to the SEL pin of the reader, TTL Serial communication is enabled.
    • The output in this mode is the 10 digit card no (ASCII) + 2 digit XOR result (ASCII)

For eg: If the RFID tag number is 500097892E, output of μRFID reader will be 500097892E60 where 60 is 50 xor 00 xor 97 xor 89 xor 2E

  • Wiegand 26

When a low value is sent to the SEL pin of the reader, Weigand26 communication is enabled.

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Frequently Asked Questions(FAQ)

Q. What is the frequency range of μRFID reader?
Ans. The operating frequency range of RFID card is 125kHz.

Q. What are the protocols μRFID reader supported?
Ans. There are two supported protocols namely TTL Serial & Wiegand 26 as per the system design.

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