#include <Wire.h>
#include <LiquidCrystal_I2C.h>

#include <DHT.h>
#define DHTPIN 16
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);



LiquidCrystal_I2C LCD = LiquidCrystal_I2C(0x27, 16, 2);
float data;
float voltage;
float voltage60;
float humidity, temp;

void setup() 
{
  LCD.init();
  LCD.backlight();
  Serial.begin(9600);
  pinMode(18, OUTPUT);
  pinMode(5, OUTPUT);
  pinMode(17, OUTPUT);
 }
   
 void loop()  
  {
  temp = dht.readTemperature();
  humidity = dht.readHumidity();
  Serial.println(("humidity = "));
  Serial.println(humidity);
  Serial.println(("temperature = "));
  Serial.println(temp);

  LCD.setCursor(0,0);
  LCD.print("temp = ");
  LCD.print(temp);
  LCD.setCursor(0,1);
  LCD.print("humidity = ");
  LCD.print(humidity);



  /*
  LCD.setCursor(0,1);
  LCD.print("humidity = ");
  LCD.print(humidity);
*/
  delay(1000);

  data=analogRead(34);
  voltage60= (60*data)/4095;

  LCD.setCursor(0,0);
  LCD.print("temp = ");
  LCD.print(temp);

  if(temp >=0 && temp<20) //ถ้าอุณหภูมิต่ำกว่าหรือเท่ากับ20 หลอดสีแดงจะติด
  {
  /* LCD.setCursor(0,1);
   LCD.print("Low ");*/
   digitalWrite(18,1);
   digitalWrite(5,0);
   digitalWrite(17,0);
  }
  else if (temp >=20 && temp<40) // ถ้าอุณหภูมิ20องศาขึ้นไป หลอดสีเหลืองจะติด
  {
  /* LCD.setCursor(0,1);
   LCD.print("Mid ");*/
   digitalWrite(18,0);
   digitalWrite(5,1);
   digitalWrite(17,0);
  }
  
  else if (temp >=40 && temp<=60) // ถ้าอุณหภูมิ40องศาขึ้นไป หลอดสีเหลืองจะติด
  {
 /* LCD.setCursor(0,1);
  LCD.print("High ");*/
  digitalWrite(18,0);
   digitalWrite(5,0);
   digitalWrite(17,1);
  }
   else
   {
  LCD.setCursor(0,1);
   LCD.print("error");
   }

  }