JRD-100 - Arduino UHF-RFID Module

17 August 2021

About the module

The JRD-100 is a wireless ultra-high frequency (UHF) RFID tag reader.

This solution allows reading up to 50 radio tags per second. The internal buffer has a capacity of 200 units. The design of the module allows the use of a transmitter with a power of 100 mW, which ensures efficient, energy-efficient operation within a radius of more than 1.5 meters.

JRD-100 Specifications

  • Tag reading distance: 1-2.5m
  • Recording distance: 10cm
  • Working voltage: 3.3 - 5V
  • Operating frequency range: 840-960 MHz
  • Output power: 18-26 dBm
  • Interface: TTL UART
  • Stable and sensitive mark reading
  • Wireless protocol support
    • EPCglobal UHF Class 1 Gen 2;
    • ISO 18000-6C.

Scope of Application

Long-range identification systems are used in a variety of areas. The module is suitable for managing warehouse logistics, automated retail trade and any accounting and security systems.

JRD-100 pinout

pin mapping

UART connection

JRD-100 “Plug & Play” is connected via UART interface. Data transmission is controlled using a set of AT commands.


Connect the EN pin to 5V and also install a pair of capacitors for power.


There are no manuals and examples of module integration in the public domain, so we ourselves developed the integration of UHF-RFID JRD-100 with Arduino.

The code works on almost any microcontroller.

In the beginning, an array of commands is given to control the module. In the body of the program, the following commands are called by the index:

#include <Arduino.h>
#include <HardwareSerial.h>

HardwareSerial Serial2(PA3, PA2);
bool DEBUG = true;

const uint8_t RFID_cmdnub[39][26] =
  {0xBB, 0x00, 0x03, 0x00, 0x01, 0x00, 0x04, 0x7E,},       //0. Hardware version 
  {0xBB, 0x00, 0x03, 0x00, 0x01, 0x01, 0x05, 0x7E,},       //1. Software version 
  {0xBB, 0x00, 0x03, 0x00, 0x01, 0x02, 0x06, 0x7E,},       //2. manufacturers  
  {0xBB, 0x00, 0x22, 0x00, 0x00, 0x22, 0x7E,},             //3. Single polling instruction 
  {0xBB, 0x00, 0x27, 0x00, 0x03, 0x22, 0x27, 0x10, 0x83, 0x7E,}, //4. Multiple polling instructions 
  {0xBB, 0x00, 0x28, 0x00, 0x00, 0x28, 0x7E,},             //5. Stop multiple polling instructions 
  { 0xBB, 0x00, 0x0C, 0x00, 0x13, 0x01, 0x00, 0x00, 0x00, 0x20,
    0x60, 0x00, 0x30, 0x75, 0x1F, 0xEB, 0x70, 0x5C, 0x59, 0x04,
    0xE3, 0xD5, 0x0D, 0x70, 0xAD, 0x7E,
  },                        //6. Set the SELECT parameter instruction 
  {0xBB, 0x00, 0x0B, 0x00, 0x00, 0x0B, 0x7E,},              //7. Get the SELECT parameter 
  {0xBB, 0x00, 0x12, 0x00, 0x01, 0x01, 0x14, 0x7E,},        //8. Set the SELECT mode 
  { 0xBB, 0x00, 0x39, 0x00, 0x09, 0x00, 0x00, 0x00, 0x00, 0x03,
    0x00, 0x00, 0x00, 0x08, 0x4D, 0x7E,
  },                      //9. Read label data storage area 
  { 0xBB, 0x00, 0x49, 0x00, 0x11, 0x00, 0x00, 0x00, 0x00, 0x03,
    0x00, 0x00, 0x00, 0x04, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x22, 0x71, 0x7E
  },   //10. Write the label data store 
  { 0xBB, 0x00, 0x82, 0x00, 0x07, 0x00, 0x00, 0xFF,
    0xFF, 0x02, 0x00, 0x80, 0x09, 0x7E,
  },                       //11. Lock the LOCK label data store 
  { 0xBB, 0x00, 0x65, 0x00, 0x04, 0x00, 0x00, 0xFF, 0xFF, 0x67,
  },                                                //12. Inactivate the kill tag 
  {0xBB, 0x00, 0x11, 0x00, 0x02, 0x00, 0xC0, 0xD3, 0x7E,}, //13. Set communication baud rate 
  {0xBB, 0x00, 0x0D, 0x00, 0x00, 0x0D, 0x7E,},            //14. Get parameters related to the Query command 
  {0xBB, 0x00, 0x0E, 0x00, 0x02, 0x10, 0x20, 0x40, 0x7E,}, //15. Set the Query parameter 
  {0xBB, 0x00, 0x07, 0x00, 0x01, 0x01, 0x09, 0x7E,},      //16. Set up work area 
  {0xBB, 0x00, 0x08, 0x00, 0x00, 0x08, 0x7E,},            //17. Acquire work locations 
  {0xBB, 0x00, 0xAB, 0x00, 0x01, 0x01, 0xAC, 0x7E,},      //18. Set up working channel 
  {0xBB, 0x00, 0xAA, 0x00, 0x00, 0xAA, 0x7E,},            //19. Get the working channel 
  {0xBB, 0x00, 0xAD, 0x00, 0x01, 0xFF, 0xAD, 0x7E,},      //20. Set to automatic frequency hopping mode
  { 0xBB, 0x00, 0xA9, 0x00, 0x06, 0x05, 0x01, 0x02,
    0x03, 0x04, 0x05, 0xC3, 0x7E,
  },                             //21. Insert the working channel 
  {0xBB, 0x00, 0xB7, 0x00, 0x00, 0xB7, 0x7E,},            //22. Acquire transmitting power 
  {0xBB, 0x00, 0xB6, 0x00, 0x02, 0x07, 0xD0, 0x8F, 0x7E,}, //23. Set the transmitting power 
  {0xBB, 0x00, 0xB0, 0x00, 0x01, 0xFF, 0xB0, 0x7E,},      //24. Set up transmitting continuous carrier 
  {0xBB, 0x00, 0xF1, 0x00, 0x00, 0xF1, 0x7E,},            //25. Gets the receiving demodulator parameters 
  {0xBB, 0x00, 0xF0, 0x00, 0x04, 0x03, 0x06, 0x01, 0xB0, 0xAE, 0x7E,}, //26. Set the receiving demodulator parameters 
  {0xBB, 0x00, 0xF2, 0x00, 0x00, 0xF2, 0x7E,},            //27. Test the RF input block signal 
  {0xBB, 0x00, 0xF3, 0x00, 0x00, 0xF3, 0x7E,},            //28. Test the RSSI signal at the RF input 
  {0xBB, 0x00, 0x17, 0x00, 0x00, 0x17, 0x7E,},            //30. Module hibernation 
  {0xBB, 0x00, 0x1D, 0x00, 0x01, 0x02, 0x20, 0x7E,},      //31. Idle hibernation time of module
  {0xBB, 0x00, 0x04, 0x00, 0x03, 0x01, 0x01, 0x03, 0x0C, 0x7E,}, //32. The IDLE mode 
  {0xBB, 0x00, 0xE1, 0x00, 0x05, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0xE4, 0x7E,}, //33.NXP G2X label supports ReadProtect/Reset ReadProtect command 
  {0xBB, 0x00, 0xE3, 0x00, 0x05, 0x00, 0x00, 0xFF, 0xFF, 0x01, 0xE7, 0x7E,}, //34. The NXP G2X label supports the CHANGE EAS directive 
  {0xBB, 0x00, 0xE4, 0x00, 0x00, 0xE4, 0x7E,},            //35. The NXP G2X tag supports the EAS_ALARM directive 
  {0xBB, 0x00, 0xE0, 0x00, 0x06, 0x00, 0x00, 0xFF, 0xFF, 0x00, 0x00, 0xE4, 0x7E,}, //36.NXP G2X label 16bits config-word 
  { 0xBB, 0x00, 0xE5, 0x00, 0x08, 0x00, 0x00, 0xFF,
    0xFF, 0x01, 0x01, 0x40, 0x00, 0x2D, 0x7E,
  },                   //37.Impinj Monza 4 Qt tags support Qt instructions 
  { 0xBB, 0x00, 0xD3, 0x00, 0x0B, 0x00, 0x00, 0xFF,
    0xFF, 0x01, 0x03, 0x00, 0x00, 0x01, 0x07, 0x00, 0xE8, 0x7E,
  },   //38.The BlockPermalock directive permanently locks blocks of a user's Block 


void Sendcommand(uint8_t com_nub)
  uint8_t b = 0;
  while (RFID_cmdnub[com_nub][b] != 0x7E)
    if(DEBUG) {
      Serial.print(" 0x");
      Serial.print(RFID_cmdnub[com_nub][b], HEX);
uint8_t DATA_I[256];

void Readcallback()
  uint8_t DATA_I_NUB = 0;
  while (Serial2.available())
    DATA_I[DATA_I_NUB] = Serial2.read();
    if (DEBUG == 1)
      if(DATA_I[DATA_I_NUB] < 16) {
        Serial.print(" 0x0");
      } else {
        Serial.print(" 0x");
      Serial.print(DATA_I[DATA_I_NUB], HEX);
/* code */
void setup() {
  // put your setup code here, to run once:
  Serial.println("begin of UHF-Reader");


void loop() {
  // put your main code here, to run repeatedly:
  for (size_t i = 0; i < 10; i++) {
    Serial.println("Single polling:");
    // Serial.println();
    Serial.println("Requesting data:");
    Serial.println("Recieving data:");
  // Serial.println("End of programm");
  // delay(5000);