PIR Motion Sensors

// Basic PIR Motion Sensor Example
#define PIR_PIN 2

void setup() {
    Serial.begin(9600);
    pinMode(PIR_PIN, INPUT);
    Serial.println("PIR Sensor Warming Up (30-60 seconds)");
    delay(50000); // Warm-up delay
    Serial.println("PIR Sensor Ready");
}

void loop() {
    if(digitalRead(PIR_PIN) == HIGH) {
        Serial.println("Motion detected!");
        delay(1000); // Avoid multiple detections
    }
}

// PIR with visual/audio feedback
#define PIR_PIN 2
#define LED_PIN 3
#define BUZZER_PIN 4

void setup() {
    pinMode(PIR_PIN, INPUT);
    pinMode(LED_PIN, OUTPUT);
    pinMode(BUZZER_PIN, OUTPUT);
    Serial.begin(9600);
    delay(60000); // 60 second warm-up
}

void loop() {
    if(digitalRead(PIR_PIN) == HIGH) {
        triggerAlarm();
    }
}

void triggerAlarm() {
    Serial.println("ALERT: Motion detected!");
    
    // Flash LED and sound buzzer
    for(int i = 0; i < 5; i++) {
        digitalWrite(LED_PIN, HIGH);
        tone(BUZZER_PIN, 1000);
        delay(200);
        digitalWrite(LED_PIN, LOW);
        noTone(BUZZER_PIN);
        delay(200);
    }
    
    delay(5000); // 5 second cooldown
}

// PIR with WiFi notification
#include <ESP8266WiFi.h>
#include <WiFiClient.h>

#define PIR_PIN D2
const char* ssid = "YOUR_SSID";
const char* password = "YOUR_PASSWORD";

WiFiServer server(80);

void setup() {
    Serial.begin(115200);
    pinMode(PIR_PIN, INPUT);
    
    WiFi.begin(ssid, password);
    while(WiFi.status() != WL_CONNECTED) {
        delay(500);
        Serial.print(".");
    }
    
    Serial.println("");
    Serial.println("WiFi connected");
    Serial.println("IP address: ");
    Serial.println(WiFi.localIP());
    
    server.begin();
    delay(60000); // PIR warm-up
}

void loop() {
    if(digitalRead(PIR_PIN) == HIGH) {
        sendNotification();
        delay(10000); // 10 second delay between detections
    }
}

void sendNotification() {
    WiFiClient client;
    if(client.connect("maker.ifttt.com", 80)) {
        String url = "/trigger/motion_detected/with/key/YOUR_KEY";
        client.print("GET " + url + " HTTP/1.1\r\n" +
                     "Host: maker.ifttt.com\r\n" +
                     "Connection: close\r\n\r\n");
        Serial.println("Notification sent");
    }
}

// Components needed:
- Multiple PIR sensors
- ESP32-CAM
- Magnetic door/window sensors
- Siren
- Keypad
- OLED display
- Cloud service

// Features:
1. Multi-zone motion detection
2. Live video capture on alarm
3. Mobile notifications
4. Armed/disarmed states
5. Entry delay
6. Battery backup

// Implementation Tips:
- Use deep sleep for battery operation
- Implement zone-specific responses
- Add two-stage arming (stay/away)
- Create custom alert patterns
- Add remote configuration
- Implement event logging