Main Article Content
Abstract
The system is designed to monitor conditions in schools both when teaching and learning activities are taking place, and when there are no teaching and learning activities. The system is designed to monitor thieves or people who enter the room without permission, detect fire smoke, and also control lights and fans automatically, and manual control via keypad, laptop and android smartphone. The system on this tool uses a password to activate and deactivate the alarm. In addition, the system is also designed and equipped with a Magnetic Door Sensor to monitor and activate the alarm when someone tries to enter the classroom. The gas sensor (MQ-2) is used to detect fire smoke in the Laboratory. The Light Dependent Resistor (LDR) sensor is used to turn the lights on and off automatically when the system's automatic mode is turned on. The LM35 sensor is used to detect room temperature and turn the fan on or off automatically when the system's automatic mode is turned on. In the system design, a 4x4 keypad is used as a tool for password input. This study produces a school security system equipped with a 4x4 keypad as a tool for password input, a Magnetic Door Sensor to detect when the door is opened when the alarm system is turned on and activates the buzzer, an LDR (Light Dependent Resistor) sensor to turn the lights on and off automatically, an LM35 sensor to turn the fan on and off automatically, and a gas sensor (MQ-2) to detect smoke from a fire in the laboratory and turn on the alarm.