#include <LiquidCrystal_I2C.h>
#include <Servo.h>
#define SERVO_PIN 9
#define TRIGGER_PIN 12
#define ECHO_PIN 11

#define LCD_ADDRESS 0x27
#define LCD_COLUMNS 16
#define LCD_ROWS 2

#define BUTTON_PIN 2

Servo myservo;
LiquidCrystal_I2C lcd(LCD_ADDRESS, LCD_COLUMNS, LCD_ROWS);

bool direction=true;
int angle = 0;
int pos = 0;
void setup() 
{
  lcd.begin(16, 2);
  Serial.begin(115200);
  pinMode(BUTTON_PIN, INPUT_PULLUP);
  myservo.attach(SERVO_PIN);
  lcd.setCursor(0,0);
  myservo.write(0);
  lcd.print("Angle: ");
}

void loop() 
{
  delay(15);
  lcd.setCursor(6,0);
  lcd.print("   ");
  lcd.setCursor(6,0);
  lcd.print(angle);
  if(digitalRead(BUTTON_PIN)==LOW)
  {
    Serial.println("Pressed");
    if(angle<180&&direction==true)
    {
      angle++;
      myservo.write(angle);
    }
    else if(direction == false&&angle>0)
    {
      angle--;
      myservo.write(angle);
    }
    else
    {
      direction=!direction;
    }
  }
  
}