#include <LiquidCrystal_I2C.h> // include the liabrary fir the LCD screen
#include <Servo.h> // Include the servo library
#include <IRremote.h> // Include IRRemote library

LiquidCrystal_I2C lcd(0x27, 16, 2); // I2C address is 0x27, 16 colums, 2 rows

int trigPin = 3;
int echoPin = 2;

int receiver_pin = 7;
int btn_value = 0;
IRrecv receiver(receiver_pin);

Servo myServo;
int servoPin = 6; //
int servoValue = 0; //
int servoAngle = 0;

void setup() {
  receiver.enableIRIn();

  pinMode(trigPin, OUTPUT);
  pinMode(echoPin, INPUT);

  myServo.attach(servoPin); // Attach the servo motor setup
  
  lcd.init(); // intializing the lcd screen
  lcd.backlight(); // turn on the backlight

  Serial.begin(9600);

}

void loop() {
  if (receiver.decode()){
    translateIR();
    receiver.resume();
  }

}

int translateIR()
{
  btn_value = receiver.decodedIRData.command;
  Serial.println(btn_value);                    

   //if statement that ensures angle doesn't go out of bounds 
   if (servoAngle == 195) {              

     servoAngle=180; 
   }//end if statement 
   //if statement that ensures angle doesn't go out of bounds 

   if (servoAngle == -15) {
     servoAngle = 0; 
    } //end if statement

  {
   if(btn_value == 224){
    servoAngle = servoAngle - 15;
    myServo.write(servoAngle);
    delay(10);
    }
 
   if(btn_value == 144){
    servoAngle = servoAngle + 15;
    myServo.write(servoAngle);
    delay(10);
    }
  }
  
 int duration = pulseIn(echoPin, HIGH);
 int centiMeters = duration/58;

 digitalWrite(trigPin, HIGH);
 delayMicroseconds(10);
 digitalWrite(trigPin, LOW);

  if (centiMeters < 50) {
   lcd.setCursor (0, 0);
   lcd.print("             ");
   lcd.setCursor(0, 1);
   lcd.print("             ");

   lcd.setCursor(0, 0);
   lcd.print("you're close!  ");
   lcd.setCursor(0, 1);
   lcd.print(centiMeters);
   lcd.print("    cm away");
   delay(1000);
  }

   else if (centiMeters > 100){
   lcd.setCursor (0, 0);
   lcd.print("             ");
   lcd.setCursor(0, 1);
   lcd.print("             ");

   lcd.setCursor(0, 0);
   lcd.print("More than 1m  ");
   lcd.setCursor(0, 1);
   lcd.print(centiMeters);
   lcd.print("    cm away");
   delay(1000);
  }
  
  else {
   lcd.setCursor (0, 0);
   lcd.print("             ");
   lcd.setCursor(0, 1);
   lcd.print("             ");

   lcd.setCursor(0, 0);
   lcd.print("Medium distance  ");
   lcd.setCursor(0, 1);
   lcd.print(centiMeters);
   lcd.print("    cm away");
   delay(1000);
  }
}