#include <TinyGPS++.h>
#include <TinyGPSPlus.h>

#include <TinyGPSPlus.h>
#include <SoftwareSerial.h>

SoftwareSerial mySerial(9, 10);
SoftwareSerial Gsm(2, 3);
TinyGPSPlus gps;

char phone_no[] = "9869118755";

#define trigPin 12  
#define echoPin 13 
#define Led_Green 8 
#define Led_Yellow 9  
#define Led_Red 10  

void sendSMS();
void sendLocationSMS(float lat, float lon);

void setup() {
    Serial.begin(9600);
    mySerial.begin(9600);
    Gsm.begin(9600);

    pinMode(trigPin, OUTPUT);
    pinMode(echoPin, INPUT);
    pinMode(Led_Green, OUTPUT);
    pinMode(Led_Yellow, OUTPUT);
    pinMode(Led_Red, OUTPUT);
}

void loop() {
    long duration, distance;   
    int max = 80;  
    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; 
    perc = (diff / max) * 100; 

    if (perc <= 25) { 
        digitalWrite(Led_Green, HIGH); 
        delay(1000); 
        digitalWrite(Led_Green, LOW); 
    }  
    if (perc >= 50 && perc < 90) { 
        digitalWrite(Led_Yellow, HIGH); 
        delay(1000);   
        digitalWrite(Led_Yellow, LOW); 
    }   
    if (perc >= 90) {   
        Serial.println("Garbage Bin is FULL.");   
        delay(1000);   
        digitalWrite(Led_Red, HIGH);   
        delay(1000);   
        digitalWrite(Led_Red, LOW); 
        sendSMS(); 
    } else { 
        Serial.print("Garbage Bin is Filled "); 
        Serial.print(perc); 
        Serial.println(" %.");  
    } 

    delay(500);  

    // GPS Data Parsing
    bool newData = false;   
    for (unsigned long start = millis(); millis() - start < 1000;) {   
        while (mySerial.available()) {       
            char c = mySerial.read();       
            if (gps.encode(c))          
                newData = true;       
        }   
    }     

    if (newData && gps.location.isUpdated()) {     
        float flat = gps.location.lat();
        float flon = gps.location.lng();
        sendLocationSMS(flat, flon);
    }     
}

void sendSMS() {
    Gsm.print("AT+CMGF=1\r");      
    delay(400);     
    Gsm.print("AT+CMGS=\"");     
    Gsm.print(phone_no);     
    Gsm.println("\"");          
    delay(300);     
    Gsm.print("The Garbage Bin is FULL.");         
    delay(200);     
    Gsm.println((char)26); // End AT command with a ^Z, ASCII code 26     
    delay(200);
}

void sendLocationSMS(float lat, float lon) {
    Gsm.print("AT+CMGF=1\r");      
    delay(400);     
    Gsm.print("AT+CMGS=\"");     
    Gsm.print(phone_no);     
    Gsm.println("\"");          
    delay(300);     
    Gsm.print("Location: http://maps.google.com/maps?q=");         
    Gsm.print(lat, 6);     
    Gsm.print(",");     
    Gsm.print(lon, 6);     
    delay(200);     
    Gsm.println((char)26); // End AT command with a ^Z, ASCII code 26     
    delay(20000);
}