Abstract :
Currently, home security systems still rely on conventional locks that are prone to break-ins and do not provide real-time alerts. Conventional locks allow anyone with a duplicate key to access the house, and keys are often lost. To address this issue, a home door security system based on IoT with the ESP8266 microcontroller was developed. This system is equipped with a Solenoid Door Lock and a Magnetic Switch sensor. Integration with Telegram enables notifications when the door is opened and access to lock the door. A 4x4 keypad is provided as an alternative if the internet connection is lost. Testing results show the system functions well: accurate sensor detection, responsive password input, and quick notification reception. This system provides an effective and modern solution for home security.