#include <HX711.h>
#include <Servo.h>
#include <Wire.h>
#include <LiquidCrystal_I2C.h>
#include <Adafruit_NeoPixel.h>


#define PIN  25
#define NUM_LEDS   16
int angle = 0;
const int trig = 12; 
const int echo = 13; 
long duration; 
int distance; 
const int pir = 23;
bool status =0;
int servoPin = 8;
const int LOADCELL_DOUT_PIN = 10;
const int LOADCELL_SCK_PIN = 11;
float weight_kg;
int per;
int forc=1;
HX711 scale;
LiquidCrystal_I2C lcd(0x27, 16, 2);
Servo servo;
Adafruit_NeoPixel strip(NUM_LEDS, PIN, NEO_GRB + NEO_KHZ800);

void setup() 
{
 pinMode(trig, OUTPUT); 
 pinMode(echo, INPUT); 
 scale.begin(LOADCELL_DOUT_PIN, LOADCELL_SCK_PIN);
 lcd.init();         
 lcd.backlight();    
 servo.attach(servoPin);
 Serial.begin(9600); 
 strip.begin();
 strip.show(); 
} 



void loop() 
{ 
 presence();
 HCSR();
 HX();
 if (weight_kg>=40||per>=95 ) {
    forc= 0;
    colorWipe(strip.Color(255, 0, 0), 50);
    lcd.setCursor(0, 1);
    lcd.print("THE BIN IS FULL");
    delay((5000));
    lcd.setCursor(0,1);
    lcd.print("                ");  
  }
  else { 
    forc= 1;
  }
}

void HCSR() {
digitalWrite(trig, LOW); 
delayMicroseconds(2); 
digitalWrite(trig, HIGH); 
delayMicroseconds(10); 
digitalWrite(trig, LOW); 
duration = pulseIn(echo, HIGH); 
distance = duration * 0.034 / 2; 
per=(distance*100)/160;
if (weight_kg<=40&&per<=94){
colorWipe(strip.Color(0,255, 0), 50);
lcd.setCursor(0, 1);
lcd.print(per);
lcd.print("% FULL");
delay((5000));
lcd.setCursor(0,1);
lcd.print("                ");
}
}

void HX() {
  if (scale.is_ready()) {
    Serial.print("Weight (kg): ");
    float calibration_factor = 420; // Exemple de facteur de calibration
    weight_kg = scale.get_units() / calibration_factor;
    Serial.println(weight_kg, 2); // Afficher le poids en kg avec 2 décimales
  } else {
    Serial.println("HX711 not found.");
  }
  delay(1000);
}

void presence() {
  status = digitalRead(pir);
   if(status== HIGH&&forc==1) {
    lcd.setCursor(0,0);
    lcd.print("                ");
    lcd.setCursor(5, 0);
    lcd.print("OPNINIG!");
    servo.write(angle);  
  }
  else{
    lcd.setCursor(0,0);
    lcd.print("                ");
    lcd.setCursor(5, 0);
    lcd.print("CLOSED!");
    servo.write(180);
  } 
}
void colorWipe(uint32_t color, int wait) {
  for(int i=0; i<strip.numPixels(); i++) {
      strip.setPixelColor(i, color);
      strip.show();
      delay(wait);
  }
}