RFID Reader.c

#define CODE_COUNT 2

#define MIN_ROTATION 150
#define MAX_ROTATION 30

int  val = 0; 
char code[10]; 
int bytesread = 0; 
int ledPin =  13;
int speakerOut = 5;

char *goodCode = "0F03042E80";

int  Cnote = 1915;
int  Dnote = 1000;

#include <Servo.h> 

Servo servo;

void soundwave(int note, int howHard ) {                        // function that takes 2 parameters, the note we want to play and how hard the sensor has been hit
  unsigned long endSoundWave = micros() + (35000 * howHard);    // start a count from the microseconds currently registered since the program first ran. And add on an arbitary value multiplied 
  y howHard value
    while(micros() < endSoundWave){                               // while the count is not reached
    analogWrite(speakerOut, 1023);                              // set the speaker to on/ high
    delayMicroseconds(note);                                    // wait the number of microseconds for the note
    analogWrite(speakerOut, 0);                                 // set the speaker to off/ low
    delayMicroseconds(note);                                    // wait for the same number again to complete our oscillation/ soundwave.
  }                                                             // repeat for the length of time.
}


void setup() { 

  Serial.begin(2400); // RFID reader SOUT pin connected to Serial RX pin at 2400bps 
  pinMode(2,OUTPUT);   // Set digital pin 2 as OUTPUT to connect it to the RFID /ENABLE pin 
  digitalWrite(2, LOW);                  // Activate the RFID reader
  pinMode(ledPin, OUTPUT);
  servo.attach(3);
  pinMode(speakerOut,OUTPUT);
  analogWrite(speakerOut, 0);
}  


void loop() { 

  if(Serial.available() > 0) {          // if data available from reader 
    if((val = Serial.read()) == 10) {   // check for header 
      bytesread = 0; 
      while(bytesread<10) {              // read 10 digit code 
        if( Serial.available() > 0) { 
          val = Serial.read(); 
          if((val == 10)||(val == 13)) { // if header or stop bytes before the 10 digit reading 
            break;                       // stop reading 
          } 
          code[bytesread] = val;         // add the digit           
          bytesread++;                   // ready to read next digit  
        } 
      } 
      if(bytesread == 10) {              // if 10 digit read is complete 
        //Serial.print("TAG code is: ");   // possibly a good TAG 
        Serial.println(code);            // print the TAG code 
        boolean success = true;
        for(int i=0;i<10;i++) {
          if(goodCode[i] != code[i]) {
            success = false;
            break;
          }
        }
        if(success){
          digitalWrite(ledPin, HIGH);
          soundwave(500, 5);
          servo.write(MAX_ROTATION);
          delay(1000);
          analogWrite(speakerOut, 0);
        } 
        else {
          soundwave(2000, 20);
        }
      } 
      bytesread = 0; 

      delay(500);
    } 
  } 

  digitalWrite(ledPin, LOW);
  servo.write(MIN_ROTATION);
  analogWrite(speakerOut, 0);
}