Use Arduino and RS232 Shield to Interface Integrated UHF RFID Reader LSID-0702

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Long Range UHF RFID reader (1-6M) (ISO18000-6C EPC G2) integrates the reader with the antenna. After first powered on, the reader will buzz once to indicate that it starts to work.  When there is tag approaching the reader, it will buzz to indicate that it’s sending the data. For the same tag, the read interval can be configured. After read, if the same tag is still in the read area, there will be no further indication, and no data will be sent.  If the time lapse exceeds  interval or different tags enter the reading zone, the reader will read the card and send out data.

In this tutorial, we show how to use the integrated UHF RFID reader with Arduino and RS232 Shield.

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Step 1: Parts List

1.1 x Arduino UNO
2.1 x Integrated UHF reader LSID-0702
3.1 x serial DB9 cable
4.1 x Rs232 shield
5.1 x UHF RFID  tag

Step 2: Wire Diagram

Install RS232 Shield v2 on Arduino, and connect the DB9 of RS232 shield to the DB9 connector of the RFID reader, and supply power to the integrated RFID reader.

Step 3: Arduino Sample Code

#include "Arduino.h"

//#define DEBUG
SoftwareSerial mySerial (5,6);
unsigned char incomingByte;

void sendIdentifyCmd ()
{
  mySerial.write (0x7c);    
  mySerial.write (0xff);
  mySerial.write (0xff);  
  mySerial.write (0x01);                  
  mySerial.write (0x08);                  
  mySerial.write (0x7d);              
#ifdef DEBUG
  Serial.print (0x7c);
  Serial.print (0xff);
  Serial.print (0xff);
  Serial.print (0x01);
  Serial.print (0x08);
  Serial.print (0x7d);
  Serial.println ();
#endif
}

void setup ()
{
  Serial.begin (9600);
  mySerial.begin (9600);
  Serial.println ("begin initial Serial!\n");
}

void loop ()
{
  sendIdentifyCmd ();
  delay (2);
  while(mySerial.available () > 0)
  {
      incomingByte=mySerial.read ();
      Serial.print (incomingByte,HEX);
      Serial.print (' ');
  }
  Serial.println ();
  delay (1000);
}

Step 4: Results

After we download the above code into Arduino, we we place the RFID tag to the reader’s antenna, the reader will buzz, and Arduino will print the ID on the serial port.

If we don’t know the command, we can refer to: http://linksprite.com/wiki/index.php5?title=Long_Range_UHF_RFID_reader_%281-6_meters%29_%28ISO18000-6C_EPC_G2%29_RS232

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    11 Discussions

    0
    None
    geraldineharu24

    Question 4 months ago on Step 4

    Hola buenas mi nombre es geraldine y estoy trabajando en un proyecto de control de inventario con RFID uhf y arduino. conecte el lector a un shiel rs232 para poder trabajar con arduino. Les comento que utilize su código para la lectura de las tarjetas pero solo me aparecen 00000 hacia abajo. quisiera saber como puedo programar el codigo para poder realizar la lectura de las tarjetas. Adjunto imagenes.

    0
    None
    RamprasadP

    Question 10 months ago

    Hi
    Iam using similar UHF RFID reader RM9001. It detects the tag when we used software provided by them through RS232.
    With arduino using RS232 to TTL converter which uses MAX3232 ic it does not detect the tag.
    Iam using softwareserial library and tried using different pins.
    Kindly help
    Ramaprasad Poojary

    0
    None
    DR272727

    1 year ago

    Windows 10

    IDE V. 1.8.5

    Arduino Uno R3

    Compiles okay.

    I don't have all the materials yet, but I'll try to circle back when I do to update if it works or not.

    #include <SoftwareSerial.h>

    #define DEBUG

    SoftwareSerial mySerial (0, 1);

    unsigned char incomingByte;

    void setup ()

    {

    Serial.begin (9600);

    mySerial.begin (9600);

    Serial.println ("begin initial Serial!\n");

    }

    void loop ()

    {

    sendIdentifyCmd ();

    delay (2);

    while (mySerial.available () > 0)

    {

    incomingByte = mySerial.read ();

    Serial.print (incomingByte, HEX);

    Serial.print (' ');

    }

    Serial.println ();

    delay (1000);

    }

    void sendIdentifyCmd ()

    {

    mySerial.write (0x7c);

    mySerial.write (0xff);

    mySerial.write (0xff);

    mySerial.write (0x01);

    mySerial.write (0x08);

    mySerial.write (0x7d);

    #ifdef DEBUG

    Serial.print (0x7c);

    Serial.print (0xff);

    Serial.print (0xff);

    Serial.print (0x01);

    Serial.print (0x08);

    Serial.print (0x7d);

    Serial.println ();

    #endif

    }

    0
    None
    spaceman2000

    1 year ago

    Maybe something else has to be done? I tried sending the same data and get no activity on the tx from this device.

    0
    None
    redent2

    2 years ago

    did anyone made it work? i am working with the same device and codes, but the output is just 0 0 0 0 0 0, there's no data recieved from the reader to arduino .

    0
    None
    grifterdrifter

    2 years ago

    Is it possible to read “µ-Chip” (or mu-chip) with this setup?

    Thanks,

    0
    None
    EmmanuelC25

    3 years ago

    The same project with two different accounts and anybody was capable to make it work, looks very suspicious.

    0
    None
    EmmanuelC25

    3 years ago

    The project looks nice and possible, but the comments...

    0
    None
    angel9110

    3 years ago

    Hi, i buy this elements and i try do this example, and doesn't work. please help me!

    0
    None
    ccolon7

    4 years ago on Introduction

    This code doesn't work at all. The wiring diagram, the worst one I have ever seen. Don't waste your money on this, believe me I tried to do this!

    0
    None
    aselishchev

    4 years ago on Introduction

    hi, what is the max distance for reading?

    will it work with stiky rfid tags?