Published February 28, 2026 © MIT

IoT Smart WiFi Power Cut Detection & Alert System

An IoT-based smart system that detects power cuts instantly and sends real-time WiFi alerts to keep homes and businesses informed. ⚡📡

BeginnerFull instructions provided8 hours117

IoT Smart WiFi Power Cut Detection & Alert System

Things used in this project

Software apps and online services

Arduino IDE

Story

🌍 1️⃣ Introduction

India me power cut ek common reality hai:

Sudden electricity failure

Sudden electricity failure

Inverter fail ho jata hai

Inverter fail ho jata hai

Shop band ho jati hai

Shop band ho jati hai

Server shutdown

Server shutdown

Refrigerator issue

Refrigerator issue

Village areas me long outages

Village areas me long outages

Sabse bada problem:

❌ Hume pata hi nahi chalta power kab gaya❌ Remote monitoring nahi❌ Server rooms me risk❌ CCTV system band ho jata hai

Isliye maine design kiya:

⚡ Smart WiFi Power Cut Detector

⚡ Smart WiFi Power Cut Detector

Ek IoT-based system jo electricity cut detect karta hai aur turant alert bhejta hai.

🔥 2️⃣ Problem Statement (India Specific)

✔ Frequent voltage fluctuation✔ Rural & semi-urban outages✔ Server room safety risk✔ Home inverter dependency✔ No real-time alert

India me small businesses, shops, labs, schools, offices ke liye bahut useful solution hai.

💡 3️⃣ Proposed Smart Solution

✔ AC voltage presence detection✔ Instant WiFi cloud alert✔ Telegram / App notification✔ Inverter status monitoring✔ Backup battery support✔ Event logging

🧰 4️⃣ Required Hardware

4.1️⃣ ESP32 (Main Controller)

Use:WiFi communication + alert system control.

4.2️⃣ AC Voltage Detection Module (Optocoupler Based)

Use:AC mains present hai ya nahi detect karta hai.

4.3️⃣ 5V SMPS Power Supply

Use:ESP32 ko stable power deta hai.

4.4️⃣ Li-ion Backup Battery (Optional)

Use:Power cut hone par bhi alert bhejne ke liye backup supply.

🔌 5️⃣ Circuit Diagram

🔗 6️⃣ Wiring Table

AC Detection Module → ESP32

OUT → GPIO 4VCC → 3.3VGND → GND

SMPS → ESP32

5V → VINGND → GND

Backup Battery → 5V Regulator (Optional)

💻 7️⃣ Software Used

1️⃣ Arduino IDE2️⃣ ESP32 Board Package3️⃣ WiFi Library4️⃣ HTTP / MQTT Library5️⃣ Firebase / Telegram Bot API

⚙️ 8️⃣ Working Logic

1️⃣ AC mains present → GPIO HIGH2️⃣ Power cut → GPIO LOW3️⃣ ESP32 instantly detect karta hai4️⃣ Telegram / App / MQTT alert bhejta hai5️⃣ Event log store karta hai

🚀 9️⃣ Key Features

✔ Real-time power failure alert✔ India-specific solution✔ Low cost✔ Cloud integration✔ Backup battery support✔ Remote monitoring

🏢 1️⃣0️⃣ Applications

✔ Home monitoring✔ Shops & stores✔ Server rooms✔ CCTV systems✔ Schools✔ Small industries✔ Rural areas

💼 1️⃣1️⃣ Business Opportunity

✔ Smart home product✔ Small business safety device✔ Server monitoring solution✔ Subscription-based alert system✔ Smart city integration

📈 1️⃣2️⃣ SEO Keywords (Important for Hackster)

Smart power cut detectorIoT electricity failure alertESP32 power monitoring systemWiFi power outage notificationIndia power cut IoT projectAC mains detection using ESP32Real-time electricity alert system

📞 1️⃣3️⃣ Project Support

Complete project, customization, PCB design, dashboard integration & commercial deployment available.

📲 WhatsApp: +91 9336183481

🏁 1️⃣4️⃣ Conclusion

Smart WiFi Power Cut Detector ensures:

✔ Instant outage detection✔ Remote monitoring✔ Business safety✔ India-ready solution✔ Affordable IoT deployment

⚡ Practical IoT for Real India Reality 🇮🇳

⚡ IoT Smart WiFi Power Cut Detection & Alert System ✅ Complete ESP32 Code

#include <WiFi.h>
#include <PubSubClient.h>

// ----------------------
// Pin Configuration
// ----------------------
#define AC_DETECT_PIN 4   // AC detection module output

// ----------------------
// WiFi Credentials
// ----------------------
const char* ssid = "YOUR_WIFI_NAME";
const char* password = "YOUR_WIFI_PASSWORD";

// ----------------------
// MQTT Configuration
// ----------------------
const char* mqtt_server = "broker.hivemq.com";
const char* topic_status = "powercut/status";

WiFiClient espClient;
PubSubClient client(espClient);

// ----------------------
// Variables
// ----------------------
bool powerStatus = true;       // true = power ON
bool lastPowerStatus = true;

// ----------------------
// WiFi Setup
// ----------------------
void setup_wifi() {
  Serial.println("Connecting to WiFi...");
  WiFi.begin(ssid, password);

  while (WiFi.status() != WL_CONNECTED) {
    delay(500);
    Serial.print(".");
  }

  Serial.println("\nWiFi Connected");
}

// ----------------------
// MQTT Reconnect
// ----------------------
void reconnect() {
  while (!client.connected()) {
    Serial.println("Connecting to MQTT...");
    if (client.connect("PowerCutDetector")) {
      Serial.println("MQTT Connected");
    } else {
      delay(2000);
    }
  }
}

// ----------------------
// Setup Function
// ----------------------
void setup() {

  Serial.begin(115200);

  pinMode(AC_DETECT_PIN, INPUT);

  setup_wifi();
  client.setServer(mqtt_server, 1883);
}

// ----------------------
// Main Loop
// ----------------------
void loop() {

  if (!client.connected()) {
    reconnect();
  }

  client.loop();

  // Read AC Detection Pin
  powerStatus = digitalRead(AC_DETECT_PIN);

  // If power status changes
  if (powerStatus != lastPowerStatus) {

    if (powerStatus == HIGH) {
      Serial.println("⚡ Power Restored");
      client.publish(topic_status, "Power ON");
    } 
    else {
      Serial.println("🚨 Power Cut Detected!");
      client.publish(topic_status, "Power OFF");
    }

    lastPowerStatus = powerStatus;
  }

  delay(1000);
}