Embedded Project on Cell Phone-Based DTMF Controlled Garage Door Opening System


The fundamental goal of this project is to unlock a garage door by a cell phone utilizing a unique password entered through the keypad of the phone. Opening and closing of garage door include human work. In this proposed framework, the opening and closing of a garage door is accomplished by utilizing a cell phone.

The proprietor can call to a cell phone interfaced to the framework which turn is connected with the garage door that can open/close the door by entering the password. This technique is exceptionally advantageous as one doesn’t need to get down of his auto to open/close the door physically.

This project depends on the idea of DTMF (dual tone multi-frequency). Each numeric button on the keypad of a cell phone creates a unique frequency when pressed. These frequencies are decoded by the DTMF decoder IC at the receiving end which is fed into the microcontroller.

If this decoded values (password entered by the client) matches with the password put away in the microcontroller, at that point the microcontroller initiates a component to door opening framework through a motor driver interface.

Further the project is incorporated with an EEPROM i.e., a non-volatile memory so the password can be changed by the proprietor.

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