#include <Wire.h>
#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27,16,2);
#include "DHT.h"
#define DHTPIN 2 
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
int relay = 3;
int relay1 = 4;
int relay2 = 5;
void setup() {
Serial.begin(9600);
Serial.println(F("DHTxx test!"));
dht.begin(); 
pinMode(relay, OUTPUT);
pinMode(relay1, OUTPUT);
pinMode(relay2, OUTPUT);
lcd.init();
lcd.backlight();
}

void loop() {
delay(500);
float h = dht.readHumidity();
float t = dht.readTemperature();
float f = dht.readTemperature(true);
if (isnan(h) || isnan(t) || isnan(f)) {
Serial.println(F("Failed to read from DHT sensor!"));
return;
}
float hif = dht.computeHeatIndex(f, h);
float hic = dht.computeHeatIndex(t, h, false);
Serial.print(F("Humidity: "));
Serial.print(h);
Serial.print(F("% Temperature: "));
Serial.print(t);
Serial.println(F(" C "));
lcd.setCursor (0,0);
lcd.print("Hum : ");
lcd.setCursor(9,0);
lcd.print(h);
lcd.setCursor(15,0);
lcd.print("%");
lcd.setCursor (0,1);
lcd.print("Tem : ");
lcd.setCursor(9,1);
lcd.print(t);
lcd.setCursor(15,1);
lcd.print("c");

if(h <30){
  digitalWrite(relay, HIGH);
  Serial.println("เเม่ปุ๊ก : ปาล์มกรอกน้ำหน่อยลูก");
  }
  else{
    digitalWrite(relay, LOW);
  }

if(t <20){
  digitalWrite(relay1, HIGH);
  }
  else{
    digitalWrite(relay1, LOW);
  }

if(t >=40){
  digitalWrite(relay2, HIGH);
  }
  else{
    digitalWrite(relay2, LOW);
  }







}