Kutluhan Aktar
Published © CC BY

WhatsApp Halloween-Themed RFID Talking Doorbell w/ RGB Eyes

Startle your guests who do not have an entrance permit (RFID tag) and get notified w/ WhatsApp messages without checking the door :)

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WhatsApp Halloween-Themed RFID Talking Doorbell w/ RGB Eyes

Things used in this project

Hardware components

PCBWay Custom PCB
PCBWay Custom PCB
×1
Arduino Nano 33 IoT
Arduino Nano 33 IoT
×1
Raspberry Pi 3 Model B
Raspberry Pi 3 Model B
Raspberry Pi 3 or 4
×1
Raspberry Pi 4 Model B
Raspberry Pi 4 Model B
Raspberry Pi 3 or 4
×1
DFRobot DFPlayer Mini MP3 Player
×1
Flash Memory Card, SD Card
Flash Memory Card, SD Card
×1
Speaker: 0.25W, 8 ohms
Speaker: 0.25W, 8 ohms
×1
MFRC522 RFID Reader
×1
RGB Diffused Common Cathode
RGB Diffused Common Cathode
×2
DC184 Yellow Pushbutton
×1
Resistor 1k ohm
Resistor 1k ohm
×1
Resistor 10k ohm
Resistor 10k ohm
×1
MB102 Power Supply Module
×1
External Battery
×1

Software apps and online services

Arduino IDE
Arduino IDE
Raspbian
Raspberry Pi Raspbian
KiCad
KiCad
Twilio API for WhatsApp
Twilio API for WhatsApp

Hand tools and fabrication machines

Soldering iron (generic)
Soldering iron (generic)
Solder Wire, Lead Free
Solder Wire, Lead Free

Story

Read more

Custom parts and enclosures

Gerber Files

Fabrication Files

WhatsApp_Talking_Doorbell.zip

Raspberry Pi Web Application

voices.zip

Schematics

PCB_1

PCB_2

PCB_3

PCB_4

Code

WhatsApp_Halloween_Themed_RFID_Talking_Doorbell.ino

Arduino
         /////////////////////////////////////////////  
        //    WhatsApp Halloween-Themed RFID       //
       //      Talking Doorbell w/ RGB Eyes       //
      //        -------------------------        //
     //           (Arduino Nano 33 IoT)         //           
    //             by Kutluhan Aktar           // 
   //                                         //
  /////////////////////////////////////////////

// Startle your guests who do not have an entrance permit (RFID tag) and get notified w/ WhatsApp messages without checking the door :)
//
// For more information:
// https://www.theamplituhedron.com/projects/WhatsApp-Halloween-Themed-RFID-Talking-Doorbell-with-RGB-Eyes/
//
// Connections
// Arduino Nano 33 IoT:           
//                            MFRC522
// D9  ----------------------- RST
// D10 ----------------------- SDA
// D11 ----------------------- MOSI
// D12 ----------------------- MISO
// D13 ----------------------- SCK
//                            DFPlayer Mini
//     ----------------------- VCC (5V External)
// TX  ----------------------- RX
// RX  ----------------------- TX
// GND ----------------------- GND
//                            RGB_Eye_1
// D3  ----------------------- R
// D5  ----------------------- G
// D6  ----------------------- B
//                            RGB_Eye_2
// A2  ----------------------- R
// A3  ----------------------- G
// A5  ----------------------- B
//                            Doorbell (Button)
// D2  ----------------------- S

/*

   Typical pin layout used:
   -----------------------------------------------------------------------------------------
               MFRC522      Arduino       Arduino   Arduino    Arduino          Arduino
               Reader/PCD   Uno/101       Mega      Nano v3    Leonardo/Micro   Pro Micro
   Signal      Pin          Pin           Pin       Pin        Pin              Pin
   -----------------------------------------------------------------------------------------
   RST/Reset   RST          9             5         D9         RESET/ICSP-5     RST
   SPI SS      SDA(SS)      10            53        D10        10               10
   SPI MOSI    MOSI         11 / ICSP-4   51        D11        ICSP-4           16
   SPI MISO    MISO         12 / ICSP-1   50        D12        ICSP-1           14
   SPI SCK     SCK          13 / ICSP-3   52        D13        ICSP-3           15

*/

#include <SPI.h>      // RC522 Module uses SPI protocol
#include <WiFiNINA.h>
#include <MFRC522.h>  // Library for Mifare RC522 Devices
#include "DFRobotDFPlayerMini.h"

char ssid[] = "[_SSID_]";        // your network SSID (name)
char pass[] = "[_PASSWORD_]";    // your network password (use for WPA, or use as key for WEP)
int keyIndex = 0;                // your network key Index number (needed only for WEP)

int status = WL_IDLE_STATUS;

// Enter the IPAddress of your Raspberry Pi.
IPAddress server(192, 168, 1, 20);

// Define the pathway of the application in the Raspberry Pi.
String application = "/WhatsApp_Talking_Doorbell/";

// Initialize the Ethernet client library
WiFiClient client;

// Create DFPlayer Mini object.
DFRobotDFPlayerMini myDFPlayer;

// Create the MFRC522 instance.
#define SS_PIN 10
#define RST_PIN 9
MFRC522 mfrc522(SS_PIN, RST_PIN);

// Define the MFRC522 module key input.
MFRC522::MIFARE_Key key;

// Define the data holders:
String lastRead; // recently read UID
int red, green, blue;
int bell = 0; // ring

// After executing the register_new_UIDs() function, paste the registered UID list here and define the total guest number:
char *invited_guests[] = {"9B B6 3C 75", "56 1B 0D F8"};
#define guest_number 2

// Define RGB pins.
#define redPin_1 3
#define greenPin_1 5
#define bluePin_1 6
#define redPin_2 A2
#define greenPin_2 A3
#define bluePin_2 A5

// Define the doorbell pin.
#define doorbell 2

void setup() {
  Serial.begin(9600); 
  
  pinMode(redPin_1, OUTPUT);
  pinMode(greenPin_1, OUTPUT);
  pinMode(bluePin_1, OUTPUT);
  pinMode(redPin_2, OUTPUT);
  pinMode(greenPin_2, OUTPUT);
  pinMode(bluePin_2, OUTPUT);
  pinMode(doorbell, INPUT);
  
  // Initiate DFPlayer Mini on the second serial port on RX0 and TX1 pins.
  Serial1.begin(9600);
  while(!myDFPlayer.begin(Serial1)){ Serial.println("Not Connected!"); }
  Serial.println("DFPlayer Connected!!!");
  myDFPlayer.setTimeOut(500); //Set serial communictaion time out 500ms
  //----Set volume----
  myDFPlayer.volume(30);  //Set volume value (0~30).
  //myDFPlayer.volumeUp(); //Volume Up
  //myDFPlayer.volumeDown(); //Volume Down
  // Set EQ
  myDFPlayer.EQ(DFPLAYER_EQ_NORMAL);
  // Set the SD Card as default source.
  myDFPlayer.outputDevice(DFPLAYER_DEVICE_SD);
  
  // Initialize MFRC522 Hardware
  SPI.begin();          
  mfrc522.PCD_Init();
  Serial.println("\n----------------------------------\nApproximate a New Card or Key Tag : \n");

  // Check for the WiFi module:
  if (WiFi.status() == WL_NO_MODULE) { Serial.println("Communication with WiFi module failed!"); while (true); }
  // Attempt to connect to the WiFi network:
  while (status != WL_CONNECTED) {
    Serial.print("Attempting to connect to SSID: ");
    Serial.println(ssid);
    // Connect to WPA/WPA2 network. Change this line if using open or WEP network:
    status = WiFi.begin(ssid, pass);
    // Wait 10 seconds for connection:
    delay(10000);
  }

  // Verify connection on the serial monitor.
  Serial.println("Connected to wifi");

  // Adjust the default color of RGB eyes.
  adjustColor('f', 255, 0, 255);
  adjustColor('s', 255, 0, 255);
  
}

void loop(){  
  // Startle and inform guests when they press the button - doorbell.
  if(digitalRead(doorbell) == HIGH){
    bell++;
    if(bell == 1){
      myDFPlayer.play(1);
      adjustColor('f', 255, 255, 0);
      adjustColor('s', 255, 255, 0);
      WhatsApp_Message("There%20is%20someone%20at%20the%20door!%20Waiting%20for%20action...%0a%0aStatus%20=>%20New%20Guest");
    }else if(bell == 2){
      myDFPlayer.play(2);
      adjustColor('f', 255, 0, 0);
      adjustColor('s', 255, 0, 0);
      WhatsApp_Message("The%20guest%20has%20not%20been%20apprised%20of%20the%20Halloween-themed%20RFID%20entrance%20system%20:)%0a%0aStatus%20=>%20Second%20Attempt");
    }else{
      bell = 0;
    }
    delay(2000);
  }

  // Uncomment to get and register new UIDs for comparison.
  //register_new_UIDs();

  read_UID();
}

int read_UID() {
  // Detect the new card or tag UID. 
  if ( ! mfrc522.PICC_IsNewCardPresent()) { 
    return 0;
  }
  if ( ! mfrc522.PICC_ReadCardSerial()) {
    return 0;
  }

  // Display the new UID.
  Serial.print("\n----------------------------------\nNew Card or Key Tag UID : ");
  for (int i = 0; i < mfrc522.uid.size; i++) {
    lastRead += mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ";
    lastRead += String(mfrc522.uid.uidByte[i], HEX);
  }
  lastRead.trim();
  lastRead.toUpperCase();
  Serial.print(lastRead);
  Serial.print("\n----------------------------------\n");

  // Detect whether the recently read UID (lastRead) is in the registered UIDs in the invited_guests string array to activate the DFPlayer with the related voice file.
  volatile boolean UID_Found = false;
  for(int i=0;i<guest_number;i++){
    if(lastRead == invited_guests[i]){
      UID_Found = true;
    }
  }
  if(UID_Found == true){
    myDFPlayer.play(4);
    adjustColor('f', 0, 255, 0);
    adjustColor('s', 0, 255, 0);
    WhatsApp_Message("One%20of%20the%20guests%20relinquished%20an%20entrance%20pass%20-%20registered%20UID%20-%20has%20been%20arrived%20:)%0a%0aStatus%20=>%20Accurate");   
  }else if(UID_Found == false){
    myDFPlayer.play(3);
    adjustColor('f', 0, 255, 255);
    adjustColor('s', 0, 255, 255);
    WhatsApp_Message("Some%20uninvited%20guest%20is%20trying%20to%20breach%20the%20entrance%20system!%0a%0aStatus%20=>%20Trespassing");    
  }

  // Reset the doorbell:
  bell = 0;

  lastRead = "";
  mfrc522.PICC_HaltA();
  return 1;
}

int register_new_UIDs() {
  // Detect the new card or tag UID. 
  if ( ! mfrc522.PICC_IsNewCardPresent()) { 
    return 0;
  }
  if ( ! mfrc522.PICC_ReadCardSerial()) {
    return 0;
  }

  // Get the recently read UID.
  for (int i = 0; i < mfrc522.uid.size; i++) {  //
    lastRead += mfrc522.uid.uidByte[i] < 0x10 ? " 0" : " ";
    lastRead += String(mfrc522.uid.uidByte[i], HEX);
  }
  lastRead.trim();
  lastRead.toUpperCase();
  // To save the new UIDs to the invited_guests string array, copy the UID list after executing this function.
  Serial.print("\"" + lastRead + "\", ");
  lastRead = "";
  mfrc522.PICC_HaltA();
  return 1;
}

void WhatsApp_Message(String body){
  // Define the required settings by Twilio - Account SID, Auth Token, FROM phone number (incoming), and TO phone number (outgoing).
  String sid = "[_SID_]";
  String a_token = "[_AUTH_TOKEN_]";
  String FROM = "14155238886";
  String TO = "[_REGISTERED_PHONE_NUMBER_]";
  
  // Connect to the web application named WhatsApp Talking Doorbell on the Raspberry Pi.
  if (client.connect(server, 80)) {
    Serial.println("Connected to the server!"); // if you get a connection, report back via serial:
    // Make an HTTP request:
    client.println("GET " + application + "?sid=" + sid + "&a_token=" + a_token + "&body=" + body + "&from=" + FROM + "&to=" + TO + " HTTP/1.1");
    client.println("Host: 192.168.1.20");
    client.println("Connection: close");
    client.println();
  }else{
    Serial.println("Server Connection Failed!");
  }
  delay(2000); // Wait 2 seconds after connection...  
}

void adjustColor(char eye, int r, int g, int b){
  switch (eye){
    case 'f':
      analogWrite(redPin_1, r);
      analogWrite(greenPin_1, g);
      analogWrite(bluePin_1, b);
    break;
    case 's':
      analogWrite(redPin_2, r);
      analogWrite(greenPin_2, g);
      analogWrite(bluePin_2, b);
    break;
  }
}

index_WhatsApp_Talking_Doorbell.php

PHP
<?php 

require_once 'WhatsAppAPI/Twilio/autoload.php'; 
 
use Twilio\Rest\Client; 

if(isset($_GET["sid"]) && isset($_GET["a_token"]) && isset($_GET["body"]) && isset($_GET["from"]) && isset($_GET["to"])){
	$sid    = $_GET["sid"]; 
    $token  = $_GET["a_token"];  
    $twilio = new Client($sid, $token);
	
	$to = $_GET['to'];
	$from = $_GET['from'];
	$body = $_GET['body'];
	
	$message = $twilio->messages 
                  ->create("whatsapp:+".$to, 
                           array( 
                               "from" => "whatsapp:+".$from,       
                               "body" => $body
                           ) 
                  );
    echo 'Message Send...';				  
	
}else{
	echo "There is no request yet!";
}

?>

Credits

Kutluhan Aktar

Kutluhan Aktar

66 projects • 215 followers
Self-Taught Full-Stack Developer | @EdgeImpulse Ambassador | Maker | Physics Enthusiast

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