Instructions

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Grove - 125KHz RFID Reader

This Grove-125KHz RFID Reader is a module used to read uem4100 RFID card

information with two output formats: Uart and Wiegand. It has a sensitivity with

maximum 7cm sensing distance. There is also the electronic brick version of this

module. It can help you with project like internet of thing and access control system.

Version

Product Version Changes Released Date

Grove - 125KHz RFID Reader V1.0 Initial Oct 2015

Specifications

Parameter Value/Range

Voltage 4.75-5.25V

Working Frequency 125 KHz

Sensing

Distance(Max)

70mm

TTL Output 9600 baudrate, 8 data bits, 1 stop bit, and no verify bit

Wiegand Output 26 bits Wiegand format, 1 even verify bit, 24 data bits, and 1 odd

verify bit

Tip

More details about Grove modules please refer to Grove System

Platforms Supported

Arduino Raspberry Pi

Summary of content (6 pages)

PAGE 1
Grove - 125KHz RFID Reader This Grove-125KHz RFID Reader is a module used to read uem4100 RFID card information with two output formats: Uart and Wiegand. It has a sensitivity with maximum 7cm sensing distance. There is also the electronic brick version of this module. It can help you with project like internet of thing and access control system. Version Product Version Grove - 125KHz RFID Reader V1.
PAGE 2
Arduino Raspberry Pi Caution The platforms mentioned above as supported is/are an indication of the module's software or theoritical compatibility. We only provide software library or code examples for Arduino platform in most cases. It is not possible to provide software library / demo code for all possible MCU platforms. Hence, users have to write their own software library.
PAGE 3
 Step 4. Connect Seeeduino to PC via a USB cable. Note If we don't have Grove Base Shield, We also can directly connect Grove_Ultrasonic_Ranger to Seeeduino as below. Seeeduino 5V GND D3 D2 Grove - 125KHz RFID Reader Red Black White Yellow Software  Step 1. Copy the code into Arduino IDE and upload. If you do not know how to upload the code, please check how to upload code.
PAGE 4
SoftSerial Shield is connected to the Software UART:D2&D3 */ #include SoftwareSerial SoftSerial(2, 3); unsigned char buffer[64]; // buffer array for data receive over serial port int count = 0; // counter for buffer array void setup() { SoftSerial.begin(9600); // the SoftSerial baud rate Serial.begin(9600); // the Serial port of Arduino baud rate. } void loop() { // if date is coming from software serial port ==> data is coming from SoftSerial shield if (SoftSerial.
PAGE 5
Wiegand Mode (Jumper Set to the Right two Pins) You would need to select the jumper to "W" to enter this mode. The Wiegand demo code for Seeeduino is designed to read Wiegand data in interrupt mode. In Wiegand Mode, output data is formatted with 26bits including 24bits card info and 2 bits parity. bit - 0 PE - 1 2 D E D2[7..0] 3 4 5 6 7 8 9 10 11 12 0 D1[7..
PAGE 6
 Card Number ID: 0009776930 ------- Decimalism [Start Bit(00) + Card Number(8 numbers)]  Output: 0700952F229F ------------- Hex [[Start Bit(07h) + Card Number(8 numbers) + Checksum]  The calculator for decimal and hex numbers is available online. Q2: How to read tags continuously? A2: The RFID reader can read tags continuously without any setting. Keep the tag 2.5-4 cm from the antenna, and the reader can read data continuously. And if the distance is below 2.