#include <WiFi.h>
#include <ESP32Servo.h> // Library untuk mengendalikan servo motor
#include <Arduino_JSON.h>
#include "HX711.h"
#include <HTTPClient.h>

HX711 scale;
Servo myservo; 
const int trigPin = 5;
const int echoPin = 18;
#define SOUND_SPEED 0.034
#define buzzer 13
#define tarebutton 34 
// HX711 circuit wiring
#define LOADCELL_DOUT_PIN 27  //2
#define LOADCELL_SCK_PIN 14 //4

long duration;
float distanceCm;

String ssid = "Wokwi-GUEST";
String pass = "";

int statusservo = 0;
int statustempatsampah = 0;
float berat = 0;
int batasmaksimal = 0;

String serverName = "https://sgp1.blynk.cloud/external/api/batch/update?token=A_9Z75e8feTHqlXPB3C9D7uedDj1Zzin&v0=";
String serverName2 = "https://sgp1.blynk.cloud/external/api/get?token=A_9Z75e8feTHqlXPB3C9D7uedDj1Zzin&v1&v2";

unsigned long myoffset,refval;
void setup() {
byte buttonstat;
// Inisialisasi Serial Monitor
Serial.begin(115200);

pinMode(trigPin, OUTPUT); // Sets the trigPin as an Output
pinMode(echoPin, INPUT); // Sets the echoPin as an Input
myservo.attach(2); 
myservo.write(0);
pinMode(buzzer, OUTPUT);      
pinMode(tarebutton, INPUT); 


// Ptogram Tera Load Cell 
  Serial.println("Initializing the scale");
  scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
  Serial.println("pastikan beban tidak ada (0 kg) lalu tekan tombol");
  do
  {
    buttonstat=digitalRead(tarebutton);
  }
  while(buttonstat==HIGH);
  delay(300);
  Serial.println("tunggu....");
  myoffset=scale.read_average(20);
  Serial.print("nilai offset: ");
  Serial.println(myoffset);
  Serial.println("berikan beban standar (1 kg) lalu tekan tombol");
  do
  {
    buttonstat=digitalRead(tarebutton);
  }
  while(buttonstat==HIGH);
  delay(300);
  Serial.println("tunggu....");
  refval=scale.read_average(20);
  Serial.print("nilai referensi: ");
  Serial.println(refval);


Serial.println("Memulai Koneksi...");
WiFi.begin(ssid, pass);
  Serial.println("Connecting");
  while(WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }
  Serial.print("Connected to WiFi network with IP Address: ");
  Serial.println(WiFi.localIP()); 
}

void sensorjarak ()
{
// Tunggu sebentar sebelum membaca sensor lagi
  digitalWrite(trigPin, LOW);
  delayMicroseconds(2);
  // Sets the trigPin on HIGH state for 10 micro seconds
  digitalWrite(trigPin, HIGH);
  delayMicroseconds(10);
  digitalWrite(trigPin, LOW);
  
  // Reads the echoPin, returns the sound wave travel time in microseconds
  duration = pulseIn(echoPin, HIGH);
  
  // Calculate the distance
  distanceCm = duration * SOUND_SPEED/2;
  
  // Prints the distance in the Serial Monitor
  Serial.print("Distance (cm ): ");
  Serial.println(distanceCm);
  if(distanceCm<=30 || statusservo == 1)
  {
   myservo.write(0);
   Serial.println("BUKA!");
  }
  else {
  Serial.println("TUTUP.");
  myservo.write(90);
  }

}
void loop() {
//  Menjalankan fungsi sensor jarak;
  sensorjarak();
  
// Membaca berat sampah
  unsigned long adcave;
  adcave=scale.read_average(1);
  berat=(adcave-myoffset)/(refval-myoffset); 
  Serial.println(String(berat) +" KG");


  // Menulis blynk
if(WiFi.status()== WL_CONNECTED)
  {
    HTTPClient http;
    String serverPath = serverName +  String(berat) +"&v3=" +statustempatsampah ;
    http.begin(serverPath);
    Serial.println(serverPath);
    int httpResponseCode = http.GET();
    if (httpResponseCode>0)
    {
      Serial.print("HTTP Response code: ");
      Serial.println(httpResponseCode);
      String payload = http.getString();
      Serial.println(payload);
    }
    else
    {
      Serial.print("Error code: ");
      Serial.println(httpResponseCode);
    }
    http.end();
  }

//  Menjalankan fungsi sensor jarak;
  sensorjarak();

//Membaca dari blynk
if(WiFi.status()== WL_CONNECTED)
  { 
    HTTPClient http;
    String serverPath = serverName2;
    http.begin(serverPath);
    int httpResponseCode = http.GET();
    if (httpResponseCode>0)
     {
      String payload = http.getString();
      JSONVar myObject = JSON.parse(payload);
      if (JSON.typeof(myObject) == "undefined")
      {
        Serial.println("Parsing input failed!");
        return;
      }

      JSONVar keys = myObject.keys();
      JSONVar value = myObject[keys[0]];
      Serial.print("keys: ");
      Serial.println(keys);
      statusservo = value;
      Serial.print("statusservo: ");
      Serial.println(statusservo);
      value = myObject[keys[1]];
      Serial.print("keys: ");
      Serial.println(keys);
      batasmaksimal = value;
      Serial.print("batasmaksimal: ");
      Serial.println(batasmaksimal);
     }
     else
    {
      Serial.print("Error code: ");
      Serial.println(httpResponseCode);
    } 
     http.end();
  }
  else
    {
      Serial.println("WiFi Disconnected");
    }

//  Menjalankan fungsi sensor jarak;
  sensorjarak();

  if (berat >= batasmaksimal){
    tone (buzzer, 1000);
    statustempatsampah = 1;
    Serial.println("Tempat Sampah Penuh!");
  }
  else {
    noTone(buzzer);
    statustempatsampah = 0;
  }

  }