IoT Pet Feeder

story :

 This IoT pet feeder is our first IoT project with circuito.io! We are happy to share it with our community to demonstrate how simple it can be to make basic IoT projects with circuito.io. We are also excited to share this project with you because it's based on a product that we worked on in the past called Playdog. You can make the feeder for your pets at home - it's both fun JPand useful.

Hardware components :

1- Arduino Arduino UNO & Genuino UNO

2- PIR Motion Sensor (generic)       

3- Everything ESP ESP8266 ESP-0 

                  

4- Speaker: 0.25W, 8 ohms             

Once you've selected the components you waLunant, click on Generate and our engines will start working on your circuit and will generate your circuito reply. The reply has three parts:

1. BoM - A list of all the components you'll need for the project, including auxiliary parts such as resistors and capacitors.

2. Step-by-step wiring guide - shows you how to connect all your components to the Arduino board using a breadboard.

3. Code - a sample code for your circuit. This code is not specific for the pet feeder project, but rather it is a sample code that creates an interaction between the different components in your circuit.

To Upload the code, follow these steps:

• Download the code from the circuito.io reply

• Extract it to your computer

• Open with Arduino IDE

• Upload to your Arduino

4. Once everything is set up, replace the sample code from the circuito reply with the code in this tutorial. Make sure to leave the //Include Libraries and //Pin Definitions at the top of the code, and also keep all the libraries that are on the original code from circuito.io.

4. Connectivity - this section will guide you how to configure the connection of your project to the internet. Since you're not going to use the sample code from circuito, but rather the code provided in this tutorial, if you click "create dashboard" you'll have to configure the dashboard manually.

If you want to use the pre-set dashboard we used, download the attached pet_feeder_dashboard html file and open it in your browser. Then follow the instructions below.

- Click on “Clone" and create a copy of the dashboard for your project.

- Choose a unique ‘thingName’.

You can find your thingname in the firmware.ino.

- Click on the settings icon at the top of the page.

Assembly :

Now that you have the electronics set up, it's time to put the parts together.

We designed a 3d printed casing for the servo, the PIR sensor and the speaker.

The .stl files are attached here. This part isn't mandatory and you can choose to connect it in a different way, it's really up to you, but look how nice and colorful it is.

code :

const int ServoRestPosition   = 20;  //Starting position
const int ServoTargetPosition = 150; //Position when event is detected
unsigned int HoorayLength          = 6;                                                      // amount of notes in melody
unsigned int HoorayMelody[]        = {NOTE_C4, NOTE_E4, NOTE_G4, NOTE_C5, NOTE_G4, NOTE_C5}; // list of notes. List length must match HoorayLength!
unsigned int HoorayNoteDurations[] = {8      , 8      , 8      , 4      , 8      , 4      }; // note durations; 4 = quarter note, 8 = eighth note, etc. List length must match HoorayLength!

unsigned int comeLength          = 3;
unsigned int comeMelody[]        = {NOTE_C5, NOTE_G5, NOTE_C5};
unsigned int comeNoteDurations[] = {8      , 8      , 8};

ESP8266 wifi(WIFI_PIN_RXD,WIFI_PIN_TXD);
Servo servo;
PIR pir(PIR_PIN_SIG);
PiezoSpeaker piezoSpeaker(PIEZOSPEAKER_PIN_SIG);

int pirCounter = 0;
// ====================================================================
// vvvvvvvvvvvvvvvvvvvv ENTER YOUR WI-FI SETTINGS  vvvvvvvvvvvvvvvvvvvv
//
const char *SSID     = "YOURWIFI"; // Enter your Wi-Fi name 
const char *PASSWORD = "YOURPASSWORD" ; // Enter your Wi-Fi password
//
// ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
// ====================================================================


// These Dweet tokens have been auto generated for you.
char* const inputToken  = "12b2cbb8-3f8e-11e7-a810-0242ac110028_input";
char* const outputToken = "12b2cbb8-3f8e-11e7-a810-0242ac110028_output";

Dweet dweet( &wifi, inputToken, outputToken);

/* This code sets up the essentials for your circuit to work. It runs first every time your circuit is powered with electricity. */
void setup() {
    // Setup Serial which is useful for debugging
    // Use the Serial Monitor to view printed messages
    Serial.begin(9600);
    Serial.println("start");
    
    if (!wifi.init(SSID, PASSWORD))
    {
        Serial.println(F("Wifi Init failed. Check configuration."));
        while (true) ; // loop eternally
    }
    servo.attach(SERVO_PIN);
    servo.write(ServoRestPosition);
    delay(100);
    servo.detach();
}

/* This code is the main logic of your circuit. It defines the interaction between the components you selected. After setup, it runs over and over again, in an eternal loop. */
void loop() {

    bool pirVal = pir.read();
    
    //SET DWEETS
    dweet.setDweet("pir", pirVal );
    dweet.setDweet("pirCounter",  pirCounter);
    
    
    dweet.sendDweetKeys();
    
    
    if (pirVal)
    {
        pirCounter++;
        // The servo will rotate to target position and back to resting position with an interval of 500 milliseconds (0.5 seconds) 
        servo.attach(SERVO_PIN);         // 1. attach the servo to correct pin to control it.
        servo.write(ServoTargetPosition);  // 2. turns servo to target position. Modify target position by modifying the 'ServoTargetPosition' definition above.
        delay(500);                              // 3. waits 500 milliseconds (0.5 sec). change the value in the brackets (500) for a longer or shorter delay in milliseconds.
        servo.write(ServoRestPosition);    // 4. turns servo back to rest position. Modify initial position by modifying the 'ServoRestPosition' definition above.
        delay(500);                              // 5. waits 500 milliseconds (0.5 sec). change the value in the brackets (500) for a longer or shorter delay in milliseconds.
        servo.detach();                    // 6. release the servo to conserve power. When detached the servo will NOT hold it's position under stress.
        
        // The Piezo Speaker light will play a beep for half a second, wait for another 500ms(half a second) and then play a tune
        piezoSpeaker.tone(400);                                                    // 1. plays a 400Hz beep. Change the value in the brackets (400) for a higher or lower beep.
        delay(500);                                                               // 2. keeps playing it for 500ms
        piezoSpeaker.off();                                                        // 3. stops the beep
        delay(500);                                                               // 4. waits 500ms                   
        piezoSpeaker.playMelody(HoorayLength, HoorayMelody, HoorayNoteDurations);  // 5. plays the Hurray melody. to play a different melody, modify HoorayLength, HoorayMelody and HoorayNoteDuration above.                    
        delay(500);                                                               // 4. waits 500ms
    }
    
    
    //GET DWEETS  
    dweet.receiveDweetEvents();
    
    
    if(strcmp(dweet.getValue() , "servo") == 0)
    {
        Serial.println(F("servo was pressed!"));
        // The servo will rotate to target position and back to resting position with an interval of 500 milliseconds (0.5 seconds) 
        servo.attach(SERVO_PIN);         // 1. attach the servo to correct pin to control it.
        servo.write(ServoTargetPosition);  // 2. turns servo to target position. Modify target position by modifying the 'ServoTargetPosition' definition above.
        delay(500);                              // 3. waits 500 milliseconds (0.5 sec). change the value in the brackets (500) for a longer or shorter delay in milliseconds.
        servo.write(ServoRestPosition);    // 4. turns servo back to rest position. Modify initial position by modifying the 'ServoRestPosition' definition above.
        delay(500);                              // 5. waits 500 milliseconds (0.5 sec). change the value in the brackets (500) for a longer or shorter delay in milliseconds.
        servo.detach();                    // 6. release the servo to conserve power. When detached the servo will NOT hold it's position under stress.
    }
    else if(strcmp(dweet.getValue() , "piezoSpeaker") == 0)
    {
        Serial.println(F("piezoSpeaker was pressed!"));
        // The Piezo Speaker light will play a beep for half a second, wait for another 500ms(half a second) and then play a tune
        piezoSpeaker.tone(400);                                                    // 1. plays a 400Hz beep. Change the value in the brackets (400) for a higher or lower beep.
        delay(500);                                                               // 2. keeps playing it for 500ms
        piezoSpeaker.off();                                                        // 3. stops the beep
        delay(500);                                                               // 4. waits 500ms                   
        piezoSpeaker.playMelody(HoorayLength, HoorayMelody, HoorayNoteDurations);  // 5. plays the Hurray melody. to play a different melody, modify HoorayLength, HoorayMelody and HoorayNoteDuration above.                    
        delay(500);                                                               // 4. waits 500ms
    }
    else if(strcmp(dweet.getValue() , "playGame") == 0)
    {
        Serial.println(F("Playing Game!"));
        while (!pir.read())
        {
          piezoSpeaker.playMelody(comeLength, comeMelody, comeNoteDurations);
          delay(500);
        }
        
        servo.attach(SERVO_PIN);
        servo.write(ServoTargetPosition);
        delay(1000);
        servo.write(ServoRestPosition);
        delay(1000);
        servo.detach();
        
        piezoSpeaker.playMelody(HoorayLength, HoorayMelody, HoorayNoteDurations);  // 5. plays the Hurray melody. to play a different melody, modify HoorayLength, HoorayMelody and HoorayNoteDuration above.                    
        
        delay(100);
    }
}