Automatic FAN and light controlled

1#include <math.h>
2#include <LiquidCrystal.h>
3
4LiquidCrystal lcd(1,2,4,5,6,7);
5int  pinOut = 10;
6int ledpin=13;
7int buttonpin=8;
8
9double Thermistor(int  RawADC) {
10 double Temp;
11 Temp = log(10000.0*((1024.0/RawADC-1))); 
12 Temp  = 1 / (0.001129148 + (0.000234125 + (0.0000000876741 * Temp * Temp ))* Temp );
13  Temp = Temp - 273.15;          
14 //Temp = (Temp * 9.0)/ 5.0 + 32.0; 
15 return  Temp;
16}
17
18void setup() {
19  pinMode(10, OUTPUT);
20 lcd.begin(16, 2);
21  //Serial.begin(9600);
22 pinMode(ledpin,OUTPUT);
23 pinMode(buttonpin,INPUT);
24}
25
26void  loop() {             
27  int val;                
28  double temp;            
29  val=analogRead(0);      
30  temp=Thermistor(val); 
31  //Serial.print("Temperature=");
32  //Serial.print(temp);
33  //Serial.println(" c");
34  
35
36  lcd.setCursor(2,1);  
37  lcd.print("Temp = ");
38    lcd.print(temp);   
39  lcd.print(" c");
40  delay(5000);            
41  lcd.clear();
42  if (temp >= 40){
43    digitalWrite(pinOut,  HIGH);
44    lcd.print("Fan on");
45    delay(1000);
46  }
47
48  else {
49    digitalWrite(pinOut, LOW);
50    lcd.print(" Fanoff");
51  
52       delay(500);  
53  }
54          
55     if(digitalRead(buttonpin)==1){
56    digitalWrite(ledpin,HIGH);
57      
58        lcd.print(" LED on");
59        delay(1000);
60  } 
61     
62  else {
63   
64      digitalWrite(ledpin,LOW);
65    lcd.print("LED off");
66    delay(500); 
67  }
68             
69}
70