The Business market for smart phone applications using Bluetooth Low Energy (BLE) is constantly amplifying nowadays. The Bluetooth Special Interest Groups (SIG) expected that in future they will encounter more than 90 percent of all Bluetooth enabled devices which supports BLE systems. Bluetooth Low Energy is becoming progressively popular in smart phone applications due to the circumstance of using it for the proximity data. This project gauges the Bluetooth Low Energy in the context of using mobile applications to unlock a door automatically when an intruder approaches the door. Computations were performed to determine the reliability, signal strength, connection latency and energy consumption for the same. The hardware designed for this door lock system is the union of components like a Bluetooth module to act as a command agent, an android mobile phone which functions as the task master, an Arduino microcontroller to process the data or to operate as a control center and a solenoid as a output for the door lock system. All of the tests stipulated above will go according to the initial design of this research.This paper provides a insight on various available security system