int temp1 = A0;
int temp2 = A1;
int temp3 = A2;
const float BETA = 3950; // should match the Beta Coefficient of the thermistor

#include "DHT.h"
#include <Servo.h>
#include <LiquidCrystal_I2C.h>
#define DHTPIN 2   
#define DHTTYPE DHT22  
Servo myservo1;
LiquidCrystal_I2C lcd(0x27,20,4);

int potpin = 0;
int val;

DHT dht(DHTPIN, DHTTYPE);

void setup() {
  Serial.begin(9600);
  Serial.println(F("DHTxx test!"));
  lcd.init();
   pinMode(temp1, INPUT);
   pinMode(temp2, INPUT);
   pinMode(temp3, INPUT);
  dht.begin();
  myservo1.attach(9);
  lcd.backlight();

}

void loop() {

  delay(2000);
// DHT
  float h = dht.readHumidity();
 
  float t = dht.readTemperature();

  float f = dht.readTemperature(true);

  if (isnan(h) || isnan(t)){
    Serial.println(F("Failed to read from DHT sensor!"));
    return;
  }

// TMPs
  int tempv1 = analogRead(A0);
  float tempc1 = 1 / (log(1 / (1023. / tempv1 - 1)) / BETA + 1.0 / 298.15) - 273.15;
  int tempv2 = analogRead(A1);
  float tempc2 = 1 / (log(1 / (1023. / tempv2 - 1)) / BETA + 1.0 / 298.15) - 273.15;
  int tempv3 = analogRead(A2);
  float tempc3 = 1 / (log(1 / (1023. / tempv3 - 1)) / BETA + 1.0 / 298.15) - 273.15;
 /*
  Serial.print("Temperature 1: ");
  Serial.print(tempc1,1);
  Serial.print(" C ");
  Serial.print("Temperature 2: ");
  Serial.print(tempc2,1);
  Serial.print(" C ");
  Serial.print("Temperature 3: ");
  Serial.print(tempc3,1);
  Serial.println(" C");

  Serial.print(F("Humidity: "));
  Serial.print(h,1);
  Serial.print(F("%  Temperature: "));
  Serial.print(t,1);
  Serial.println(F("°C "));
  */
//lcd
  lcd.setCursor(0,0);
  lcd.print("T1:");
  lcd.print(tempc1,1);
  lcd.print(" C ");
  lcd.print("T2:");
  lcd.print(tempc2,1);
  lcd.print(" C ");
  lcd.setCursor(0,1);
  lcd.print("T3:");
  lcd.print(tempc3,1);
  lcd.println(" C");
  lcd.setCursor(0,2);
  lcd.print("RH:");
  lcd.print(h,1);
  lcd.print(" % ");
  lcd.print("T:");
  lcd.print(t);
  lcd.print(" C");

//conditions 
   if ((h<=90 && h>=70) && (t<=28 && t>=22)) {
  myservo1.write(0);
  lcd.setCursor(0,3);
  lcd.print("OPTIMAL");
  }
   if ((h>90) && (t<=28 && t>=22)) {
  myservo1.write(180);
  lcd.setCursor(0,3);
  lcd.print("RH HIGH");
  }
   if ((h<70) && (t<=28 && t>=22)) {
  myservo1.write(90);
  lcd.setCursor(0,3);
  lcd.print("RH LOW");
  }
   if ((h<=90 && h>=70) && (t<22)) {
  myservo1.write(90);
  lcd.setCursor(0,3);
  lcd.print("TEMP LOW");
  }
   if ((h<=90 && h>=70) && (t>28)) {
  myservo1.write(180);
  lcd.setCursor(0,3);
  lcd.print("TEMP HIGH");
  }
   if ((h>90) && (t>28)) {
  myservo1.write(30);
  lcd.setCursor(0,3);
  lcd.print("CRITICAL");
  }
}