Smart Grocery List

int led = D0; // This is where your LED is plugged in. The other side goes to a resistor connected to GND.
int boardLed = D7;
int photoresistor = A0; // This is where your photoresistor is plugged in. The other side goes to the "power" pin (below).

int power = A5; // This is the other end of your photoresistor. The other side is plugged into the "photoresistor" pin (above).
// The reason we have plugged one side into an analog pin instead of to "power" is because we want a very steady voltage to be sent to the photoresistor.
// That way, when we read the value from the other side of the photoresistor, we can accurately calculate a voltage drop.

int analogvalue; // Here we are declaring the integer variable analogvalue, which we will use later to store the value of the photoresistor.
int present;
int critical_value = 30;
int dooropencutoff = 90;
int door;

bool dooropen = false;
bool milkpresent = true;

String data;  //string global variable for publishing

// Next we go into the setup function.

void setup() {

    // First, declare all of our pins. This lets our device know which ones will be used for outputting voltage, and which ones will read incoming voltage.
    pinMode(led,OUTPUT); // Our LED pin is output (lighting up the LED)
    pinMode(photoresistor,INPUT);  // Our photoresistor pin is input (reading the photoresistor)
    pinMode(power,OUTPUT); // The pin powering the photoresistor is output (sending out consistent power)
    pinMode(boardLed,OUTPUT);
    // Next, write the power of the photoresistor to be the maximum possible, so that we can use this for power.
    digitalWrite(power,HIGH);

    // We are going to declare a Paritcle.variable() here so that we can access the value of the photoresistor from the cloud.
    Particle.variable("analogvalue", &analogvalue, INT);
    // This is saying that when we ask the cloud for "analogvalue", this will reference the variable analogvalue in this app, which is an integer variable.
    Particle.variable("door", &door, INT);
    // We are also going to declare a Particle.function so that we can turn the LED on and off from the cloud.
   Particle.subscribe("doorStatus",myHandler);
}

 
void myHandler(const char *event,const char *data)
{  if (dooropen==true) {
    if (strcmp(data,"Closed")==0) {
    // if your buddy's beam is intact, then turn your board LED off
    door=0;
   dooropen=false;
   delay(12000);
   digitalWrite(boardLed,HIGH);
   delay(1000);
    digitalWrite(led,HIGH);
    delay(3000);
   analogvalue = analogRead(photoresistor);
   if (milkpresent==true){
   if  (analogvalue<critical_value) {
    Particle.publish("Milk","No");
    milkpresent=false;
    present=0;
    updateThingspeak();
    }}
    else{
    if (analogvalue>dooropencutoff){
    }
    else if(analogvalue>critical_value) {Particle.publish("Milk","Yes");
    milkpresent=true;
    present=1;
    updateThingspeak();
    }
    else{}
    }
    digitalWrite(boardLed,LOW);
    digitalWrite(led,LOW);
    }
  else {
  //Particle.publish("Door","Open");
    // if the data is something else, don't do anything.
    // Really the data shouldn't be anything but those two listed above.
  }}
  else {
        if (strcmp(data,"Open")==0){
      door=1;
      dooropen=true;
    }
        else{
    }
  }
}

bool updateThingspeak() 
{
     
        bool success = Particle.publish("Thingspeak", +
     "{ \"1\": \"" + String(present) + "\" }", 60, PRIVATE);
    return success; //if sent, then turn of the send flag, otherwise let it try again.
    
}