A cost-effective door intrusion alert system using an ESP8266 microcontroller with an IR sensor, placed strategically near or above door frames. The IR sensor detects door openings and sends alerts through Wi-Fi to platforms like Amazon Alexa (via Voice Monkey) or Gmail. The system includes: IR Sensor to detect door opening ESP8266 to transmit signals over Wi-Fi Integration with Arduino IDE, Adafruit, and IFTTT Alerts through mail or smart home assistants A modular design that can be adapted to different door types Costs significantly less than market CCTV alternatives (~₹1000)  

SDG Focus: SDG 11 – Sustainable Cities and Communities Constraints Addressed: Must cost less than cheapest CCTV with motion sensors Should be mounted discreetly to avoid detection or tampering by intruders Idea Origin: A neighbor’s home was burgled, and reviewing CCTV footage was tedious and ineffective. Prototyping & Technology Exploration: ESP32 with camera: Rejected due to low quality (2MP) and wiring challenges Ultrasonic/heat sensors: Rejected due to false triggers and poor performance IR sensor (chosen): Reliable, easy-to-integrate, and cost-effective Skills Applied: CAD | Electronics | Design Thinking | Programming | Soldering | Prototyping