/*Welcome to our PROJECT 3 IN 1*/
/*Group of member
1.MUHAMMAD SHAKIR BIN KAMARUDIN  
2.MUHAMMAD ADAM SHAMSUDIN
3.MUHAMMAD DANISH BIN AZNEE
4.MUHAMMAD ALIFF HAZIMI BIN MOHD REDZUAN*/



#include <LiquidCrystal_I2C.h>
LiquidCrystal_I2C lcd(0x27, 16, 2);


#define echoPin 2
#define trigPin 3

int maximumRange = 350;
int minimumRange = 5;
int buzzer = 8;
long duration, distance;
int DistanceCm;
void setup() {
lcd.begin(16,2);


Serial.begin (9600);
pinMode (trigPin, OUTPUT);
pinMode (echoPin, INPUT);
pinMode(9, OUTPUT);
pinMode(10, OUTPUT);
pinMode(11, OUTPUT);
pinMode(buzzer, OUTPUT);
  
}

void loop() {

digitalWrite(trigPin, LOW);
delayMicroseconds (2) ;
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);

duration = pulseIn(echoPin, HIGH);
distance = duration*0.0343/2;
DistanceCm = duration*0.0343/2;
 
 lcd.setCursor(0,0);
 lcd.print("Distance: ");
 lcd.print(DistanceCm);
 lcd.print(" cm ");
 delay (10);

if (distance > maximumRange || distance < minimumRange){
Serial.println("Exceed the limit or not reach the limit");
}
else {


Serial.print("Distances :  ");
Serial.print(distance);
Serial.println(" cm");
delay (1000);


}

if (distance <= 100){
   digitalWrite(11, HIGH);
   digitalWrite(10, LOW);
   digitalWrite(9, LOW);
}
if (distance > 100  && distance < 200){
   digitalWrite(11, LOW);
   digitalWrite(10, HIGH);
   digitalWrite(9, LOW);   
}
if (distance > 200){
   digitalWrite(11, LOW);
   digitalWrite(10, LOW);
   digitalWrite(9, HIGH);
}
if (distance <= 100){
  
   digitalWrite(11, HIGH);
   digitalWrite(10, LOW);
   digitalWrite(9, LOW);
   digitalWrite(buzzer, HIGH);
}
if (distance <= 100){ 

    tone(buzzer,1000);
    delay(8000);
    noTone(8);
    delay(0);
}
if (distance > 100  && distance < 200){
  
    digitalWrite(11, LOW);
    digitalWrite(10, HIGH);
    digitalWrite(9, LOW);
    digitalWrite(buzzer, HIGH);
}
if (distance > 100  && distance < 200){

    tone(buzzer,800);
    delay(100);
    noTone(8);
    delay(600);   

}
}