Pet Feeder

// This #include statement was automatically added by the Particle IDE.
#include <Adafruit_SSD1306.h>

Servo myservo;  // create servo object to control a servo
                // a maximum of eight servo objects can be created

int pos = 0;    // variable to store the servo position
int displayTime(); //displaytime function
int inputPin = D0; // choose the input pin (for PIR sensor)
int ledPin = D7; //Onboard LED pin
int ledPin2 = D3;// LED Pin for showcase function
int pirState = LOW; // assuming no motion detected
int val = 0; // variable for reading the pin status
int count = 0;//count for the thingspeakwriteall
int calibrateTime = 10000;// wait for the calibration
int Feedings = 0;//initial feedings 

#define OLED_DC     D2 //Pin out for the OLED Display
#define OLED_CS     D4 //   "   "   "   "   "   "
#define OLED_RESET  D5 //  "   "   "   "   "   "
Adafruit_SSD1306 display(OLED_DC, OLED_RESET, OLED_CS); //OLED Display function
 int  x, minX;

const String key = "write-key-here"; //Thing Speak write key
Timer timer3(15000, updateThingspeak); //Calls Thingspeak every 15000 ms

void setup()
{
  Particle.function("feed", feedf);  // create a function called "feedf" 
  Particle.function("Showcase",Showcasef); // create a function called "Showcasef"                                     
    timer3.start(); //initialize timer3 for thingspeakwrite all
    myservo.attach(D1);  // attach the servo on the D1 pin to the servo object
    myservo.write(0);    // Start from position 0 degree
    pinMode(ledPin,OUTPUT); //Sets D7 as an output
    pinMode( ledPin2, OUTPUT); // Sets showcase LED pin as an output
    pinMode(inputPin, INPUT);  // declare PIR sensor as input
    //Particle.subscribe("Feed", myHandler); //Subscribes to operate the OLED display
    Time.zone(-5); //Sets the time zone for eastern time
    Serial.begin(9600); //Begins the serial print

  display.begin(SSD1306_SWITCHCAPVCC);
  display.setTextSize(1);       // text size for OLED display
  display.setTextColor(WHITE); // text color for OLED display
  display.setTextWrap(false); // turn off text wrapping so we can do scrolling
}

int feedf(String command)   // Command function for mg958 servo to actuate the feed lever
{                          // be accompanied by a string.
    if(command == "morning")   // if the string is "feed now", feed once.
    {          
        Particle.publish("Feed","morning"); //publishes "Feed" event to the cloud
        oled();
        myservo.write(180);       // move servo to 180 degrees
        digitalWrite(D7, HIGH); // flash the LED (as an indicator)
        delay(800);             // wait 800 ms
        myservo.write(0);      // move servo to 0
        digitalWrite(D7, LOW);  // turn off LED
        return 1;               // return a status of "1"
    }
    
    else if(command == "lunch")   // if the string is "feed now", feed once.
    {          
        Particle.publish("Feed","lunch"); //publishes "Feed" event to the cloud
        oled();
        myservo.write(180);       // move servo to 180 degrees
        digitalWrite(D7, HIGH); // flash the LED (as an indicator)
        delay(800);             // wait 800 ms
        myservo.write(0);      // move servo to 0
        digitalWrite(D7, LOW);  // turn off LED
        return 1;               // return a status of "1"
    }
    
   else if(command == "dinner")   // if the string is "feed now", feed once.
    {          
        Particle.publish("Feed","dinner"); //publishes "Feed" event to the cloud
        oled();
        myservo.write(180);       // move servo to 180 degrees
        digitalWrite(D7, HIGH); // flash the LED (as an indicator)
        delay(800);             // wait 800 ms
        myservo.write(0);      // move servo to 0
        digitalWrite(D7, LOW);  // turn off LED
        return 1;               // return a status of "1"
    }
    
}

int Showcasef(String command) //Command function for turning the light on/off for viewing the circuit inside once installed in the feeder
{
    if(command == "On")
    {
        digitalWrite(ledPin2, HIGH); //Turns on white led on pin D3
    }
    else if(command == "Off")
    {
        digitalWrite(ledPin2, LOW); //Turns off whit led on pin D3
    }
}

void loop()
{
  
  if ( calibrated() )// if the sensor is calibrated
  {
  
    readTheSensor();// get the data from the sensor

     reportTheData();// report it out, if the state has changed
  
   }
    else {}
  
}

void readTheSensor() { //Function for reading the PIR sensor
  val = digitalRead(inputPin); //Establishes variable for reading the PIR sensor
}

bool calibrated() {
  return millis() - calibrateTime > 0;
}

void reportTheData() { //function for using the PIR sensor input to display on the OLED and publish to the cloud

  if (val == HIGH) {
        //Setup for the OLED. Splits it onto two lines
        display.clearDisplay();
        display.setTextSize(2);
        display.setTextColor(WHITE);
        display.setCursor(0,0); //Starts text in upper left hand corner as the datum
        display.print("Chewie");
        display.setCursor(10,30); //Moves text over 10 and down 30 from datum
        display.print("is eating");
        display.display();
    
    if (pirState == LOW) {
     
        Feedings = Feedings+1; //Iteration adds one 
        Particle.publish("Chewie-is-eating",String(Feedings)); //Publishes the string of Feedings to use on the Picture frame and thingspeak
        pirState = HIGH;
        setLED( pirState );
    }
  } 
  else {
      static int lastSecond = 61;
  if (Time.second() != lastSecond)
  {
    char myTimeString[125] = "";
    const int currentTime = Time.now();
    sprintf(myTimeString, "%02d:%02d:%02d", Time.hour(currentTime), Time.minute(currentTime), Time.second(currentTime)); //displays time when no activity
    
    display.clearDisplay();   // clears the screen and buffer
    display.setTextSize(2); //Text size for OLED
    display.setTextColor(WHITE);
    display.setCursor(12,20); //Moves text over 12 and down 20
    display.println(myTimeString);
    display.display();
    lastSecond = Time.second(currentTime);
  }

    if (pirState == HIGH) {
      pirState = LOW;
      setLED( pirState );
    }
}
}
void oled()
{
//void myHandler(const char *event, const char *data) //Function for displaying on the OLED that the pet feeder was activated
//{
 //if (strcmp(data,"Chewie_was_fed!")==0) {
        display.clearDisplay();
        display.setTextSize(2);
        display.setTextColor(WHITE);
        display.setCursor(0,0);
        display.print("Chewie");
        display.setCursor(10,30);
        display.print("was fed!");
        display.display();
        delay(3000); //Will Display this message for 3000ms before returning to the time
 //}
}

void setLED( int state )
{
  digitalWrite( ledPin, state );//turns the d7 led on/off based on PIR status
}

bool updateThingspeak() //ThingsSpeak code from John McAlpine
{
    count++;
    Serial.print("Updating Thingspeak:");
    Serial.print(count);
    

      bool success = Particle.publish("thingSpeakWrite_All", +
     "{ \"1\": \"" + String(Feedings) + "\"," +
       "\"k\": \"" + key + "\" }", 60, PRIVATE);
    return success; 
    
}