E-Key Prototype Implementation Based on Short Message Service (SMS) Technology

Smart home technology covers many systems in a house, such as lighting systems, electronic appliance control, garden maintenance systems, security systems and so on. The use of SMS (Short Message Service) technology on cellular phones has been widely applied in various researches in the fields of smart homes, smart agriculture and industry. The research aimed to implement the electronic key using a keypad, GSM module, limit switch and the Arduino Nano. Arduino Nano serves as a processor for the control of the door lock that will be ordered through the keypad and SMS gateway, the keypad used as a close command and the SMS gateway used as a remote command for the owner of the house or building to open or lock the door. There are several components as the actuator, i.e. solenoid, buzzer and SMS gateway. The solenoid has the function to lock or open the door automatically, the buzzer functions as an alarm, and the SMS gateway has a function to send the activity/status of the door. The warning system uses a buzzer that will light up for 30 seconds if the door is open (according to the limit switch detection) whereas there is no input from the SMS or keypad.