arduino ibeacon detector

ibeacon_detector.ino

#include <SoftwareSerial.h>
SoftwareSerial BT(7, 8);    // 7 Bluetooth TX, 8 Bluetooth RX

void setup()
{
  unsigned int total_fail = 0;
  unsigned int fail = 0;
  unsigned int loops = 0;
  float result;
  
  String ibeacon_list;
  String my_ibeacon = ":123B6A1A4E6E:-";
  
  BT.begin(9600);
  Serial.begin(9600);
  
  if(isATReady())
  {
    while(true)
    {
      loops++;
      ibeacon_list = getIbeaconList();
      BT.flush();

      if(ibeacon_list.indexOf(my_ibeacon)!=-1)
      {
        fail = 0;
      }
      else
      {
        fail++;
        total_fail++;
      }
      result = (float)total_fail * 100 / loops;
      Serial.println(ibeacon_list);
      Serial.print("iBeacon: ");
      Serial.println(my_ibeacon);
      Serial.print("SEGUNDUEK MARTXAN: ");
      Serial.println(millis()/1000);
      Serial.print("LOOP: ");
      Serial.println(loops);            
      Serial.print("FAIL SEGIDUEK: ");
      Serial.println(fail);
      Serial.print("FAIL DANETARA: ");
      Serial.println(total_fail);
      Serial.print("FAIL %: ");
      Serial.println(result, 4);
      Serial.println("-----------------------------------");              
    }
  }
  else
  {
    Serial.println("Not ready :(");
  }
}

void loop()
{
}

boolean isATReady()
{
  String bt_response = "";
  int loops = 10;
  int i = 0;
  
  do
  {
    BT.print("AT");
    delay(1);
    bt_response = getBt();
    delay(10);

    if(i==loops)
    {
      BT.flush();
      return false;
    }
    i++;
  }
  while(bt_response!=String("OK"));
  
  BT.flush();

  if(i<loops)
    return true;
  else
    return false;
}

String getIbeaconList()
{
  String response;
  BT.flush();
  BT.write("AT+DISI?");
  delay(10);
  //OK+DISISOK+DISC:4C000215:74278BDAB64445208F0C720EAF059935:FFE0FFE1C5:78A5048CECAC:-053OK+DISC:4C000215:74278BDAB64445208F0C720EAF059935:FFE0FFE1C5:78A50485AF2D:-050OK+DISCE
  response = getBt();
  
  while(response.startsWith(String("OK+DISIS"))==true && response.endsWith(String("OK+DISCE"))==false)
  {
    response += getBt();
    delay(10);
  }
  return response;
}

String getBt()
{
  String response;
  char a;

  if (BT.available())
  {
    while(BT.available())
    {
      a = BT.read();
      response += a;
      delay(1);
    }
  }
  return response;
}