/*  Box Food Saver V.1.0
    code written by Giuseppe Allocca
    FabLab class 2018
    Santa Chiara FabLab SIena Italy
    */

//pins definition
int powerled = 3; //white led
int comled = 2;//blu led
int sensor= 16;
int sensor_value=0;
int button=5;
int valbutton=0;
int valv=8;
int pump=17;
int draweropen=0;
int empty=0;

// waitButton Function
  void waitButton()
    {//start waitButton
    valbutton = digitalRead(button);  //read button value
    while(digitalRead(5) == 0){
  // blue led blink wait button pressed
  digitalWrite(comled,HIGH);delay(10);digitalWrite(comled,LOW);delay(10);}
   OpenDrawer();// when button is pressed then call openDrawer function
    }// End waitButton Function

// closeDrawer Function
void closeDrawer()
{//start closeDrawer
            while(analogRead(16) >500 ){
  // blue led blink wait button pressed
  digitalWrite(comled,HIGH);delay(10);digitalWrite(comled,LOW);delay(10);}
           vacuum();
}// End closeDrawer Function

// OpenDrawer Function
void OpenDrawer()
{//start openDrawer
           digitalWrite(comled,HIGH);
             digitalWrite(valv,LOW);
              delay(200);
            digitalWrite(valv,HIGH);
           digitalWrite(comled,LOW);
          delay(50);
          closeDrawer();
}// End OpenDrawer Function

// vacuum Function
void vacuum()
{//start vacuum
     digitalWrite(comled,HIGH);
     digitalWrite(pump,LOW);
     delay(1000);
     digitalWrite(pump,HIGH);
     digitalWrite(comled,LOW);
     delay(50);
     waitButton();
}// End vacuum Function

void setup() {
// initialize pin input/output
  pinMode(powerled, OUTPUT);
   pinMode(comled, OUTPUT);
      pinMode(sensor, INPUT);
      pinMode(button, INPUT);
    pinMode(valv,OUTPUT);
  pinMode(pump,OUTPUT);
  
    // turn LED on:
    digitalWrite(powerled, HIGH);//Board power-on 
    digitalWrite(comled,LOW);//comled off
//turn off pump and valve
    digitalWrite(pump,HIGH);//HIGH value 
    digitalWrite(valv,HIGH);//turn OFF the RELAYS
    
 }// end void setup

// "void loop" only read sensor value and call the correct function,
// after this  , logical loop work alone
void loop() {
     
    sensor_value=analogRead(sensor); // read the sensor value from pin 16

/* sensor control: is the drawer close? 
 if yes call vacuum function,  else wait until the drawer will be closed 
 */
        if ((sensor_value)<500)
                  {vacuum();
                   } // end if
     closeDrawer();

} //end void loop