To build an IoT-based fire detection system that senses fire or smoke using a sensor, triggers an alarm locally (e.g., LED or buzzer), and sends an instant notification to a mobile phone using the Blynk IoT app.
Working Principle
A fire sensor (flame sensor or smoke/gas sensor like MQ-2) detects the presence of fire or smoke.
The ESP32 reads the sensor value.
If fire is detected, it:
Sends an alert notification to the Blynk app via Wi-Fi.
Turns on a buzzer or LED as a local alarm.