Things used in this project

Hardware components:
A000066 iso both
Arduino Arduino UNO & Genuino UNO
×1
13285 01
PIR Motion Sensor (generic)
×1
Esp01
Everything ESP ESP8266 ESP-01
×1
10722 01
Speaker: 0.25W, 8 ohms
×1
SparkFun Servo - Generic Metal Gear (Micro Size)
×1
Software apps and online services:
8ztngd 9
circuito.io
Use this magic link >>https://www.circuito.io/app?selectedComponentsIds=11021&selectedComponentsIds=9442&selectedComponentsIds=13678&selectedComponentsIds=197253&selectedComponentsIds=931983&selectedComponentsIds=10333

Custom parts and enclosures

speaker mount
servo mount
servo case
PIR case

Schematics

Pet Feeder Dashboard
pet_feeder_dashboard_WOIWcsixUg.html

Code

Code for IoT pet feederArduino
Replace the sample code from the circuito reply with the code below.
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.
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);
    }
}

Credits

Jzbvk4go5lw68vtvbfe4
circuito.io team

Circuito.io is an online platform that generates wiring and code for Arduino projects. Want to know more? Visit http://circuito.io

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