“Today we are gonna make a “Tiny Security” using Atmel ATtiny85. Our final system will consists of ATtiny85, ESP8266-01, PIR sensor, Other electronic components(capacitors,resistors,voltage regulators,battery). How does this “Tiny Security” works? The PIR sensor in the system detects human in its surrounding and sends data to ATtiny. ATtiny85 commands ESP8266-01 to send data to cloud through internet. From cloud we get sms alert to our mobile and also we get sound alert via webpage from browser.”