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**"Welcome back! In this project, we'll explore how to build a basic security system using an ESP32 board.

Key Components:

• PIR Motion Sensor: Detects movement within its range, triggering alerts.

• WhatsApp Notifications: Receive instant alerts on your phone for added security.

• 5V Buzzer: Provides a simple audible alarm.

Project Overview:

This project demonstrates a simple security system. When the PIR sensor detects motion, it triggers an alert. You'll receive a WhatsApp notification, and the buzzer will sound. This provides a basic level of security for your home or workspace.

API Integration:

We utilize the free CallMeBot API service to send WhatsApp notifications. For more information on the CallMeBot API, please visit the [CallMeBot website](link to CallMeBot website)."

Key Improvements:

• Conciseness: The text is more concise and easier to read.

• Clarity: The project's purpose and functionality are clearly explained.

• Structure: The information is presented in a more organized and structured manner.

• Professionalism: The tone is more professional and engaging.

I hope this revised version is more effective!
Here's the revised text with the specified removals:

let’s do this project step by step. The required components are given below.

• ESP32 DEVKIT V1 board

• ESP32 Adapter

• PIR sensor

• Buzzer

• Breadboard

• Jumper wires

Making Process: Step-by-Step

1. Gather Materials:

   • ESP32 DEVKIT V1 board

   • ESP32 Adapter

   • PIR motion sensor

   • Buzzer

   • Breadboard

   • Jumper wires

2. Connect Components:

   • Power: Connect the ESP32 board to the adapter and power it on.

   • PIR Sensor:

     • Connect the VCC pin of the PIR sensor to 3.3V on the ESP32 board.

     • Connect the GND pin of the PIR sensor to the GND pin on the ESP32 board.

     • Connect the OUT pin of the PIR sensor to a digital input pin on the ESP32 board (e.g., GPIO 2).

   • Buzzer:

     • Connect one leg of the buzzer to a digital output pin on the ESP32 board (e.g., GPIO 4).

     • Connect the other leg of the buzzer to the GND pin on the ESP32 board.

3. Develop Code:

   • Use the Arduino IDE or a similar development environment to write the code for the ESP32.

   • The code should:

     • Read the digital input from the PIR sensor.

     • If motion is detected (PIR sensor output is HIGH):

       • Send a WhatsApp notification using the CallMeBot API.

       • Activate the buzzer by setting the corresponding digital output pin HIGH.

     • If no motion is detected:

       • Deactivate the buzzer by setting the corresponding digital output pin LOW.

4. Upload Code:

   • Connect the ESP32 board to your computer via USB.

   • Upload the compiled code to the ESP32 board using the Arduino IDE or a similar tool.
     Arduino Code :

     #include <WiFi.h> #include <HTTPClient.h> #include <UrlEncode.h> #define Buzzer 2 #define Sensor 4 const char* ssid = "SSID";//Enter your SSID const char* password = "PASSWORD";//Enter your password String phoneNumber = "PHONE_NUMBER"; //country_code + phone number String apiKey = "API_KEY"; void setup() { Serial.begin(115200); pinMode(Buzzer, OUTPUT); pinMode(Sensor, INPUT); WiFi.begin(ssid, password); Serial.println("Connecting"); while (WiFi.status() != WL_CONNECTED) { delay(500); Serial.print("."); } Serial.println(""); Serial.print("Connected to WiFi network with IP Address: "); Serial.println(WiFi.localIP()); // Send Message to WhatsAPP sendAlert("Your system is ready!"); } void loop() { bool sensorValue = digitalRead(Sensor); if (sensorValue == 1) { digitalWrite(Buzzer, HIGH); sendAlert("Warning!"); } else { digitalWrite(Buzzer, LOW); } } void sendAlert(String message) { // Data to send with HTTP POST String url = "https://api.callmebot.com/whatsapp.php?phone=" + phoneNumber + "&apikey=" + apiKey + "&text=" + urlEncode(message); HTTPClient http; http.begin(url); // Specify content-type header http.addHeader("Content-Type", "application/x-www-form-urlencoded"); // Send HTTP POST request int httpResponseCode = http.POST(url); if (httpResponseCode == 200) { Serial.print("Message sent successfully"); } else { Serial.println("Error sending the message"); Serial.print("HTTP response code: "); Serial.println(httpResponseCode); } // Free resources http.end(); }

5. Test the System:

   • Power on the system.

   • Simulate motion in front of the PIR sensor.

   • Verify that:

     • A WhatsApp notification is received.

     • The buzzer sounds.

6. Fine-tune and Refine:

   • Adjust the sensitivity of the PIR sensor as needed.

   • Experiment with different notification methods (e.g., SMS, email).

   • Enhance the system with additional features (e.g., temperature and humidity monitoring, camera integration).

Note:

• This is a basic outline. The specific code and wiring will vary depending on your implementation and the libraries you use.

• Ensure proper grounding and avoid short circuits.

• Refer to the datasheets of the components for detailed specifications and pinouts.

This step-by-step guide provides a general framework for building your simple home security system. Remember to consult the documentation and online resources for more specific instructions and troubleshooting tips.