ID-12 RFID reader set-up with an arduino and Spark Core

Getting Started
1

Hello :smile:

We are a group of students from Denmark who are currently trying to store RFID Data from an ID-12 reader to a cloud server somehow. We would like to list these IDā€™s and acces them with a web application.

Here is our current setup:

So far we have setup the Arduino with the ID-12 reader so that when a registered tag is read, a green LED flashes.

This is done with this Arduino code:

int RFIDResetPin = 12;

//Register your RFID tags here
char tag1[13] = "4D006A7AFDA0";
char tag2[13] = "4D006A7AFDA0";
char tag3[13] = "4D006A7AFDA0";
char tag4[13] = "4D006AC4C82B";
char tag5[13] = "01023C0A4376";
char tag6[13] = "4D006AA52DAF";
char tag7[13] = "01023C0A3207";
char tag8[13] = "4D006";
char tag9[13] = "4D006AC";
char tag10[13] = "4D006AC4C";

void setup(){
  Serial.begin(9600);

  pinMode(RFIDResetPin, OUTPUT);
  digitalWrite(RFIDResetPin, HIGH);


  pinMode(2, OUTPUT);
  pinMode(3, OUTPUT);
  pinMode(4, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(6, OUTPUT);
  pinMode(7, OUTPUT);
  pinMode(8, OUTPUT);
  pinMode(9, OUTPUT);
  pinMode(10, OUTPUT);
  pinMode(11, OUTPUT);
}

void loop(){


  char tagString[13];
  int index = 0;
  boolean reading = false;

  while(Serial.available()){

    int readByte = Serial.read(); //read next available byte

    if(readByte == 2) reading = true; //begining of tag
    if(readByte == 3) reading = false; //end of tag

    if(reading && readByte != 2 && readByte != 10 && readByte != 13){
      //store the tag
      tagString[index] = readByte;
      index ++;
    }
  }

  checkTag(tagString); //Check if it is a match
  clearTag(tagString); //Clear the char of all value
  resetReader(); //eset the RFID reader
}

void checkTag(char tag[]){
  ///////////////////////////////////
  //Check the read tag against known tags
  ///////////////////////////////////

  if(strlen(tag) == 0) return; //empty, no need to contunue

  if(compareTag(tag, tag1)){ // if matched tag1, do this
    lightLED(2);
    Serial.println("Brown Elastic");

  }
  else if(compareTag(tag, tag2)){ //if matched tag2, do this
    lightLED(2);


  }
  else if(compareTag(tag, tag3)){
    lightLED(2);



  }
  else if(compareTag(tag, tag4)){
    lightLED(2);
    Serial.println("Yellow Clip");

  }
  else if(compareTag(tag, tag5)){
    lightLED(2);


  }
  else if(compareTag(tag, tag6)){
    lightLED(2);
    Serial.println("Green Clip");


  }
  else if(compareTag(tag, tag7)){
    lightLED(2);


  }
  else if(compareTag(tag, tag8)){
    lightLED(2);

  }
  else if(compareTag(tag, tag9)){
    lightLED(2);

  }
  else if(compareTag(tag, tag10)){
    lightLED(2);

  }
  else{
    lightLED(5);
    Serial.println(tag); //read out any unknown tag

  }

}

void lightLED(int pin){
  ///////////////////////////////////
  //Turn on LED on pin "pin" for 250ms
  ///////////////////////////////////
  Serial.println(pin);

  digitalWrite(pin, HIGH);
  delay(750);
  digitalWrite(pin, LOW);
}

void resetReader(){
  ///////////////////////////////////
  //Reset the RFID reader to read again.
  ///////////////////////////////////
  digitalWrite(RFIDResetPin, LOW);
  digitalWrite(RFIDResetPin, HIGH);
  delay(150);
}

void clearTag(char one[]){
  ///////////////////////////////////
  //clear the char array by filling with null - ASCII 0
  //Will think same tag has been read otherwise
  ///////////////////////////////////
  for(int i = 0; i < strlen(one); i++){
    one[i] = 0;
  }
}

boolean compareTag(char one[], char two[]){
  ///////////////////////////////////
  //compare two value to see if same,
  //strcmp not working 100% so we do this
  ///////////////////////////////////

  if(strlen(one) == 0) return false; //empty

  for(int i = 0; i < 12; i++){
    if(one[i] != two[i]) return false;
  }

  return true; //no mismatches
}

This is our tags(125khz):

We are able to print the tag ID in serial (Serial.println() ) via RX on the arduino, which is great. However we need to send this information to a web application.

We feel that this should be fairly simple since that we only want to add() the tag to a list, if scanned. And remove() it again if it is scanned again.

We have read @bko tutorials about ā€œReading Spark Variables with Your Own HTML Fileā€ and ā€œUsing Spark.publish() with Simple JSON Dataā€. Which were great, and we were wondering if it were possible to read the RFID data to a HTML file(like the temperature example)?

We should probably wire the ID-12 up with the Spark Core, and thus eliminating the need to the Arduino entirely, but the communication would still be via serial, so we feel that wouldnā€™t really do much for us.

We are quite new to the whole Spark Core/Server side of things, so any input would be greatly appreciated(links, tutorials, general discussion)

Thanks! :smile:

1 Like