#include <LiquidCrystal.h> //liquid crystal libary
#define trigger 7 // trigger on the ping sensors
#define echopin 6 //echopin on the ping sensor
#define trigger2 9 //second trigger on ping sensor
#define echopinn 10 //second echopin on the ping sensors
#define button 8 //buton pin 
#define off LOW // I'm using the interal resistor on the arduino for the button and the button will awalys be on high so we 
//need to define it or int to t ``he button so when we push it it sets on low instead of high.
int answer = 0;// this is the total to the two ping sensors when they both add up it is set to zero because we need a no value until we click the button for the added up value.
int buttonstate = 0;// the thing i said the button awalys being high we need to set the button push to count it by 1 which tells the arduino
// and the code the button has been pushed as low.
int tube = 19.5;// this is the height of the tube im using so it awalys adds 19.5 cm + the just measured cm.
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);//this is the pins we are useing for the 16x2 lcd screen we are using.
void setup () {
  lcd.begin(16, 2);// this sets the area of the screen.
  
  lcd.print("Please click [o]  ");//the screen will show this .
  
  
  //Serial.begin(9600);
  pinMode(trigger, OUTPUT);
  pinMode(echopin, INPUT); //this reads the sensor data when it turns on.
  pinMode(button,INPUT);// this reads the button when its is pushed,
  digitalWrite(button,HIGH);//this sets the internal resistor for the arduino on high i belive im still learning but it works.
  pinMode(trigger2, OUTPUT);
  pinMode(echopinn, INPUT);
}

 void loop(){
 buttonstate = digitalRead(button); //the digitalRead function tells the code the button has been pushed. 
 if (buttonstate == off){ // the if statemennt tells the arduino if condition has been met do something 
  lcd.clear();// this clears the letters on the screen
  long duration, distance,distance2; // the long varabile keeps numbers for the values we give it like duration and distance
  digitalWrite(trigger, LOW);
  delayMicroseconds(2);
  digitalWrite(trigger, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger, LOW);
  duration = pulseIn( echopin, HIGH);  
  distance = (duration/2) / 29.1;
  delay(80);
  digitalWrite(trigger2, LOW);
  delayMicroseconds(2);
  digitalWrite(trigger2, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigger2, LOW);
  duration = pulseIn( echopinn, HIGH); 
  distance2 = (duration/2) / 82.1;
  delay(80);
  answer=distance+distance2+tube;// this is adding the tube +the distance of one sensor +the second sensor.

  //Serial.print(distance);
  //Serial.print(" cm");
 //Serial.print(" +");
 //Serial.print(" cm");
 //Serial.println(distance2);
 //Serial.print(" =");
 lcd.print("room is =");
 lcd.setCursor(1,11 ); // this sets the the printed words to the second column
 lcd.print( answer);//this prints the total of everything
 lcd.print(" cm");// this prints cm at the end of evey total
 }
  else { // the else statemenat awalys goes after the if statement so if the condition is not meant it will do something else instead,
  digitalWrite(trigger, LOW);// this turns off the sensor from pinging.
  digitalWrite(trigger2,LOW);

  
 }
 }