arduino-RWDH2

Arduino library to interface with ibtechnology's RWD Hitag2 RFID modules

Installation

Clone as RWDH2 and put in your arduino libraries folder

Notes

Please note that the ibtechnology modules only support PASSWORD mode, not crypto

This library is based on the RWDH2 datasheet

Usage

See the examples included. Simple reading of tag UID's:

#include <RWDH2.h>
#include <SoftwareSerial.h>

uint8_t rx_pin = 11;
uint8_t tx_pin = 12;
uint8_t cts_pin = 10;

SoftwareSerial rwdh2_serial(rx_pin, tx_pin);

// To use hardware serial replace rwdh2_serial with Serial
RWDH2 rwdh2(rwdh2_serial, cts_pin);

void setup() {
  Serial.begin(115200);
  rwdh2_serial.begin(RWDH2_BAUD);
  
  Serial.println("Initialising RWDH2...");
  Serial.println("Enabling UID mode...");
  rwdh2.begin(true);

  uint8_t id[200];
  if (rwdh2.getIdentifier(id)) {
    Serial.println((char*) id);
  } else {
    Serial.print("RWDH2 initialisation failed: ");
    Serial.println(rwdh2.getLastAck(), HEX);
  }
}

void loop() {
  uint8_t uid[4];
  if (rwdh2.getUID(uid)) {
    Serial.print("Got a tag: ");
    for (uint8_t i=0; i < 4; i++) {
      Serial.print("0x");
      Serial.print(uid[i], HEX);
      Serial.print(" ");
    }
    Serial.println();
  } 
  delay(50);
}