ds18b20 Address Recorder

#include <OneWire.h>
#include <DallasTemperature.h>
#include <LiquidCrystal_I2C.h>
#include <SD.h>
#include <SPI.h>

#define ONE_WIRE_BUS 2
#define TEMPERATURE_PRECISION 14

LiquidCrystal_I2C lcd(0x27, 2, 1, 0, 4, 5, 6, 7, 3, POSITIVE);  // Set the LCD I2C address


float tempC;
 int n = 1;
int numberOfDevices; 
int i=0;

int change = 0;      int counter = 0;   
int len = 30;
    const int buttonPin = 7;     
    const int buttonPin1 = 9;     
    const int buttonPin2 = 8;     

    int buttonState = HIGH;  
    int buttonState1 = HIGH;  
    int buttonState2 = HIGH; 
    
OneWire oneWire(ONE_WIRE_BUS); // Setup a oneWire instance to communicate with any OneWire devices 
DallasTemperature sensors(&oneWire); // Pass our oneWire reference to Dallas Temperature. 
DeviceAddress tempDeviceAddress; // We'll use this variable to store a found device address



void setup(void)
{

     lcd.begin(20,4);   // initialize the lcd for 16 chars 2 lines, turn on backlight
     lcd.noCursor();
  
 sensors.begin();  // Start up the library

  
 numberOfDevices = sensors.getDeviceCount();   // Grab a count of devices on the wire

  
 

}

void printTemperature(DeviceAddress deviceAddress) // function to print the temperature for a device
{
  if ( i > (numberOfDevices - 1)) {i = 0;}

  tempC = sensors.getTempC(deviceAddress);
  lcd.setCursor(0,2);
  lcd.print("Reading: ");
  lcd.setCursor(8,2);


  lcd.print(" ");
  lcd.setCursor(10,2);
  
  lcd.print(tempC);


  delay(50);
}

void loop(void)
{ 
  lcd.clear();        
  delay(1000);
  sensors.begin();  // Start up the library

  
  numberOfDevices = sensors.getDeviceCount();   // Grab a count of devices on the wire
      pinMode(buttonPin, INPUT);
     digitalWrite(7, HIGH); 
     buttonState = digitalRead(7);

     lcd.print("Sensor");
     lcd.setCursor(7,0);
     lcd.print(n);




     pinMode(buttonPin2, INPUT);
     digitalWrite(8, HIGH); 
     buttonState2 = digitalRead(8);

    
     pinMode(buttonPin1, INPUT);
     digitalWrite(7, HIGH);
     digitalWrite(9, HIGH); 
     buttonState = digitalRead(7);
     lcd.clear();
      while (buttonState == 1){
        lcd.print("Sensor: ");
        lcd.print(n);
        lcd.setCursor(0,3);
        lcd.print("Next");
        delay(100);
        lcd.setCursor(0,0);
        buttonState1 = digitalRead(9);
        buttonState2 = digitalRead(8);
        buttonState = digitalRead(7);

        if (buttonState1 == 0){
          n =  n+ 1;
          digitalWrite(9, HIGH); 
          delay(100);}
        

        if (buttonState2 == 0){
          n = n - 1;
          digitalWrite(9, HIGH); 
          delay(100);}
         }

     lcd.clear();        
     delay(500);
  

 lcd.clear();
 pinMode(buttonPin2, INPUT);
 pinMode(buttonPin1, INPUT);
 digitalWrite(5, HIGH); 
 digitalWrite(6, HIGH); 


  numberOfDevices = sensors.getDeviceCount();   // Grab a count of devices on the wire

  
  lcd.print("Scanning Sensors");  // locate devices on the bus
  
  delay (200);lcd.print("."); delay (200);lcd.print(".");delay (200);lcd.print(".");
  delay (200);lcd.print(".");delay (200);
  lcd.setCursor(0,1);

  lcd.print(numberOfDevices, DEC);
  lcd.print(" Sensor"); 
  lcd.setCursor(7,0);
  lcd.print(n);
  delay(1000);
  lcd.clear();
        sensors.requestTemperatures(); // Send the command to get temperatures
  
  for(i=0;i<numberOfDevices; i++) {  // Loop through each device, print out temperature data
     if(sensors.getAddress(tempDeviceAddress, i))
  {
    // Output the device ID
    // It responds almost immediately. Let's print out the data
    printTemperature(tempDeviceAddress); // Use a simple function to print out the data
  } 
  
  }
  // Loop through each device, print out address
  for(int i=0;i<numberOfDevices; i++)
  {
    // Search the wire for address
    if(sensors.getAddress(tempDeviceAddress, i))
  {
      String dataString = "";
      dataString += String("Sensor: ");
      dataString += String(n, DEC);
      dataString += String(" addr: ");

    SD.begin(10);
    File dataFile = SD.open("datalog.txt", FILE_WRITE);    //write adresses to sd card 
       if (dataFile) {
        dataFile.print(dataString);
        dataFile.close();
       }
 
  lcd.setCursor(0,0);
    lcd.print("Sensor: ");
    lcd.print(n, DEC);
    lcd.print(" addr: ");
    lcd.setCursor(0,1);
    printAddress(tempDeviceAddress);


    delay(2000);

  }
  }

     pinMode(buttonPin1, INPUT);
     digitalWrite(7, HIGH); 
     buttonState = digitalRead(7);
      while (buttonState == 1){

  sensors.requestTemperatures(); // Send the command to get temperatures
  
  for(i=0;i<numberOfDevices; i++) {  // Loop through each device, print out temperature data
     if(sensors.getAddress(tempDeviceAddress, i))
	{
		// Output the device ID
		// It responds almost immediately. Let's print out the data
		printTemperature(tempDeviceAddress); // Use a simple function to print out the data
	} 
	
  }
        lcd.setCursor(0,3);
        lcd.print("Next");
        lcd.setCursor(0,2);
        buttonState = digitalRead(7);

    delay (100);  }
 
   

               


}


// function to print a device address
void printAddress(DeviceAddress deviceAddress)
{
  for (  i = 0; i < 8; i++)
  {
    if (deviceAddress[i] < 16) Serial.print("0");
    
       String dataString = "";

      dataString += String(deviceAddress[i], HEX);

    SD.begin(10);
    File dataFile = SD.open("datalog.txt", FILE_WRITE);
       if (dataFile) {
        dataFile.print(dataString);
        dataFile.close();
       }
  
    lcd.print(deviceAddress[i], HEX);
  }
      File dataFile = SD.open("datalog.txt", FILE_WRITE);
       if (dataFile) {
        dataFile.print("   Reading");
        dataFile.print(" :");
        dataFile.print(tempC);
        dataFile.print(" \n");        dataFile.print(" \n");
        dataFile.close();}
}