#include <Servo.h>
int buttonpin= 7;
int relaypin = 4;
int last_state= HIGH;
#include <LiquidCrystal_I2C.h>
#include "DHT.h"
#define DHTPIN 11
#define DHTTYPE DHT22
DHT dht(DHTPIN, DHTTYPE);
LiquidCrystal_I2C lcd(0x27,20,4);

Servo myservo;  // Create Servo object to control servo
                // 12 servo objects can be created on most boards

long pos = 0;   //var to store servo position

void setup(){
  pinMode(DHTPIN,INPUT);
  lcd.init();
  lcd.backlight();
  dht.begin();
  Serial.begin(115200);
  pinMode(buttonpin, INPUT_PULLUP);
  pinMode(relaypin, OUTPUT);
  myservo.attach(9);    // attaches the servo on pin 9 to the servo object
}

void loop() {
  lcd.setCursor(1,0);

  int value=digitalRead(buttonpin);
  if(last_state!=value){
    last_state=value;
    if(value==HIGH){
      digitalWrite(relaypin,LOW);
      lcd.print("released");
      for(pos=0;pos<=180;pos+=1){
        myservo.write(pos);
        delay(15);
      }
      for(pos=180;pos>=0;pos-=1){
        myservo.write(pos);
        delay(15);
      }
    }
    else{
        digitalWrite(relaypin,HIGH);
        lcd.print("pressed");
    }
  }
}