#include "HX711.h" //This library can be obtained here http://librarymanager/All#Avia_HX711
#include <Wire.h> 
#include <LiquidCrystal_I2C.h>
#define BLYNK_TEMPLATE_ID "TMPL6km9zWVn6"
#define BLYNK_TEMPLATE_NAME "Sistem Pengelolaan Ruang Parkir Berbasis IoT"

#include <WiFi.h>
#include <WiFiClient.h>
#include <BlynkSimpleEsp32.h>

LiquidCrystal_I2C lcd(0x27,20,4);

// definisi variabel token, ssid, password
char auth[] = "U2Fi0f_iaw4Oh5q3k4Uf5qcMed7czRYl";
char ssid[] = "Samsung";
char pass[] = "123456789";

WidgetLED led1(V1);
WidgetLED led2(V2);

#define LOADCELL_DOUT_PIN1  5
#define LOADCELL_SCK_PIN1 18

#define LOADCELL_DOUT_PIN2 13
#define LOADCELL_SCK_PIN2  14

HX711 scale1;
HX711 scale2;

float calibration_factor1 = 434.10; //-7050 worked for my 440lb max scale setup
float calibration_factor2 = 431.10; //-7050 worked for my 440lb max scale setup

void setup() {
  Serial.begin(9600);
  lcd.init();
  lcd.backlight();
  Blynk.begin(auth, ssid, pass);

  // Serial.println("HX711 calibration sketch");
  // Serial.println("Remove all weight from scale");
  // Serial.println("After readings begin, place known weight on scale");
  // Serial.println("Press + or a to increase calibration factor");
  // Serial.println("Press - or z to decrease calibration factor");
  lcd.setCursor(0,0);
  lcd.print(" Sistem Pengelolaan ");
  lcd.setCursor(0,1);
  lcd.print("    Ruang Parkir    ");
  lcd.setCursor(0,2);
  lcd.print("      Berbasis      ");
  lcd.setCursor(0,3);
  lcd.print(" Internet of Things ");
  delay (2000);
  lcd.clear(); 

  scale1.begin(LOADCELL_DOUT_PIN1, LOADCELL_SCK_PIN1);
  scale2.begin(LOADCELL_DOUT_PIN2, LOADCELL_SCK_PIN2);
  scale1.set_scale();
  scale2.set_scale();
  scale1.tare();	//Reset the scale to 0
  scale2.tare();	//Reset the scale to 0

  long zero_factor1 = scale1.read_average(); //Get a baseline reading
  long zero_factor2 = scale2.read_average(); //Get a baseline reading
  // Serial.print("Zero factor 1: "); //This can be used to remove the need to tare the scale. Useful in permanent scale projects.
  // Serial.println(zero_factor1);
  // Serial.print("Zero factor 2: "); //This can be used to remove the need to tare the scale. Useful in permanent scale projects.
  // Serial.println(zero_factor2);
}

void loop() {

  int total = 0;
  int p1,p2;
  scale1.set_scale(calibration_factor1); //Adjust to this calibration factor
  scale2.set_scale(calibration_factor2); //Adjust to this calibration factor

  lcd.setCursor(0, 0);
  lcd.print("   Selamat Datang   ");

  if(scale1.is_ready()) {
    long reading1 = scale1.get_units(10);
    Serial.print("Sensor 1 reading results : ");
    Serial.println(reading1);
    if(reading1 > 120) {
      p1 = 1;
      led1.on();
      lcd.setCursor(0,2);
      lcd.print("P1:TERISI");
      Serial.println("P1:TERISI");
    } else {
      p1 = 0;
      led1.off();
      lcd.setCursor(0,2);
      lcd.print("P1:KOSONG");
      Serial.println("P1:KOSONG");
    }
  } else {
    Serial.println("HX711 1 not found");
  }


  if(scale2.is_ready()) {
    long reading2 = scale2.get_units(10);
    Serial.print("Sensor 2 reading results : ");
    Serial.println(reading2);
    if(reading2 > 120) {
      p2 = 1;
      led2.on();
      lcd.setCursor(11, 2);
      lcd.print("P2:TERISI");
      Serial.println("P2:TERISI");
    } else {
      p2 = 0;
      led2.off();
      lcd.setCursor(11, 2);
      lcd.print("P2:KOSONG");
      Serial.println("P2:KOSONG");
    }
  } else {
    Serial.println("HX711 2 not found");
  }

  lcd.setCursor(0, 1);
  total = p1 + p2;
  lcd.print("  Total Kosong : ");
  lcd.setCursor(17, 1);
  lcd.print(total);

  if(total == 2) {
    lcd.setCursor(0, 3);
    lcd.print("Maaf Parkiran Penuh!");
  } else if(total == 0 || total == 1) {
    lcd.setCursor(0, 3);
    lcd.print("         ..         ");
  }

  // Serial.println("===================");
  Blynk.run();
  delay(1000);

  // Serial.print("Reading: ");
  // Serial.print(scale1.get_units(10), 4);
  // Serial.print(" gram"); //Change this to kg and re-adjust the calibration factor if you follow SI units like a sane person
  // Serial.print(" calibration_factor 1: ");
  // Serial.print(calibration_factor1);
  // Serial.println();

  // Serial.print("Reading: ");
  // Serial.print(scale2.get_units(10), 4);
  // Serial.print(" gram"); //Change this to kg and re-adjust the calibration factor if you follow SI units like a sane person
  // Serial.print(" calibration_factor 2: ");
  // Serial.print(calibration_factor2);
  // Serial.println();

  // if(Serial.available())
  // {
  //   char temp1 = Serial.read();
  //   if(temp1 == '+' || temp1 == 'a')
  //     calibration_factor1 += 10;
  //   else if(temp1 == '-' || temp1 == 'z')
  //     calibration_factor1 -= 10;
  // }

  // if(Serial.available())
  // {
  //   char temp2 = Serial.read();
  //   if(temp2 == 'x' || temp2 == 'b')
  //     calibration_factor2 += 10;
  //   else if(temp2 == 'y' || temp2 == 'c')
  //     calibration_factor2 -= 10;
  // }

  // Serial.println("=====================");

  delay(1000);
}