In terms of house security, the doors are playing important roll. To have the residence safe and secure, the door will be kept locked by the owner at all times. When sometimes, landlords left the house. the landlords forget to lock the door, or the landlords are not definite if they close the door or not. This paper will represent a wi-fi base smart door lock system. It also uses the ESP32 CAM module and telegram. In the working system when a person presses the doorbell the landlord receives a message on his/her mobile handset with the photo of that person. This paper also represents that if the owner wants to operate the smart lock with his/ her phone he/she is free to do so or the landlord is able to open or close the door with his/her phone after checking the photo of that person. The ESP32 CAM and internet of things (IoT) is used by this door security system to monitor and watched the status of the door, so it enhances the security of the home.

Keywords : Wi-Fi lock security system, House security, ESP32 Camera, IoT based door lock.