garbage monitoring using arduino code with gsm

#include <SoftwareSerial.h>

#include <LiquidCrystal.h>

//LiquidCrystal lcd(7, 6, 5, 4, 3, 2);

LiquidCrystal lcd(13, 12, 11, 10, 9, 8);

SoftwareSerial mySerial(0,1);

#define trigPin 2
#define echoPin 3

#define PIR_sensor 4
#define m11 5
#define m12 6

void setup()
{
   lcd.begin(16, 2);
   lcd.print("    Garbage    ");
   Serial.println("garbage ");
  lcd.setCursor(0,1);
  lcd.print("   Open Close    ");
  Serial.println(" open close");
  delay(3000);
  lcd.clear();
  //lcd.print(" ");
  delay(2000);
mySerial.begin(9600); // Setting the baud rate of GSM Module
Serial.begin (9600);
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
 pinMode(m11, OUTPUT);
  pinMode(m12, OUTPUT);
 

}
void loop()
{
 readPIR();
 pingDist();
 SendMessage();
}


void pingDist ()
  {
   
long duration, distance;
int max = 80; // Let consider as Height of the Garbage Bin is = 80 cm.
float diff, perc;
digitalWrite(trigPin, LOW);
delayMicroseconds(2);
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration/2) / 29.1;
diff = max - distance; // 'diff' variable tells u that, how much the Garbage Bin is Left to fill.
perc = (diff/max)*100; // 'perc' variable tells u that, how much percentage the Garbage Bin is filled.

if (perc>=10)
{
 
Serial.println("Garbage Bin is FULL."); // When the Garbage Bin is filled more than 90%, then this Error Message will Displayed.
lcd.print("Garb Bin full.");
lcd.setCursor(2,1);
// Call the Function of Send SMS.
SendMessage(); // Send Message Function Call.
}

else
{
Serial.print("Garbage Bin is Filled ");
lcd.setCursor(0,1);
//lcd.print("Garb Bin filled");
Serial.print(perc);
Serial.print("     %."); // These 3 Lines are print, that how much the Garbage
lcd.setCursor(0,0);
lcd.print("perc:");
lcd.print("    %.");
lcd.setCursor(5, 0);
//Bin is Filled...Ex. "Garbage Bin is Filled 70%.".
}


if (distance >= 200 || distance <= 2)
{
Serial.println("Out of range");
lcd.print("Out of range");
lcd.setCursor(0,1);
}
else
{
Serial.print(distance);
Serial.println(" cm");
//lcd.print("  ");
//lcd.print(" cm");
lcd.setCursor(9,1);
}

delay(500);
}
void SendMessage()
{
mySerial.println("AT+CMGF=1"); //Sets the GSM Module in Text Mode
//lcd.print("AT+CMGF=1");
//lcd.setCursor(0,1);

delay(1000); // Delay of 1000 milli seconds or 1 second

mySerial.println("AT+CMGS=\"+919003413525\"\r"); // Replace x with mobile number

//lcd.print("AT+CMGS=\"+919003413525\"\r");

lcd.setCursor(0,1);

//delay(1000);

mySerial.println("Garbage Bin is Full."); // The SMS text you want to send
//lcd.print("Garb.BinisFull");

//delay(1000);

mySerial.println((char)26); // ASCII code of CTRL+Z

//delay(1000);

}

void readPIR()
{

 if(digitalRead(PIR_sensor))
  {
    lcd.setCursor(0,0);
    lcd.print("Movement Detected");
    Serial.println("Movement Detected");
    lcd.setCursor(0, 1);
    lcd.print("    Gate Opened    ");
    Serial.println("Gate Opened ");
    digitalWrite(m11, HIGH);         // gate opening
    digitalWrite(m12, LOW);
    delay(1000);
    digitalWrite(m11, LOW);          // gate stop for a while
    digitalWrite(m12, LOW);
    delay(1000);
    lcd.clear();
    lcd.print("   Gate Closed    ");
    digitalWrite(m11, LOW);           // gate closing
    digitalWrite(m12, HIGH);
    delay(1000);
    digitalWrite(m11, LOW);            // gate closed
    digitalWrite(m12, LOW);
    delay(1000);
  }
}