An Integrated Presence Detection Sensor and Android Mobile Application System for Energy Management and Control
Indian Journal of Science and Technology
Objectives: It is a common responsibility for individuals and organizations to effectively manage energy in buildings for economic and environmental concerns. In this study, the development of an energy management system integrated with a presence detecting sensor and an android mobile application for remote control of electrical appliances is undertaken. Methods/ findings: The integrated system is basically composed of a human presence detecting Passive Infrared (PIR) sensor mounted on a WeMos
... mounted on a WeMos D1 microcontroller and remotely monitored and controlled from a web server using an android mobile application via a wireless network. The developed system provides multiple benefits. It eliminates human involvement and manpower often required to manually toggle power outlets and appliances on/off. Application: Furthermore, it conserves electrical energy and prevents wastages by ensuring that energy is only consumed when needed. The developed system is recommended for residential and small office applications. appliances remotely with the help of the mobile application. If motion is detected and the appliances are turned ON, the user can switch the appliances OFF through the mobile application. The flow chart is illustrated in Figure 7 . FIGURE 7. Outlet control flow chart. System description The block diagram of the design is shown in Figure 8 . FIGURE 8. System block diagram. The HC-SR501 PIR sensor continuously monitors the area to detect motion. Its detection range is 7 meters by 140° coning angles. It has a delay time of 16s but adjustable. The ambient temperature is 253 °K-323 °K. It is powered directly from the 1stWeMos D1 ESP8266 Wifi microcontroller through the 5Vdc supply pin. Its output is connected as the input to the programmable GPIO pin. If motion or human presence is detected by the sensor, it sends a logic 1 value to the database, else a logic 0 value is sent. The logic 1 value corresponds to high signal output on the sensor's output pin which can be read by the microcontroller to then drive a transistor and switch to a higher current load.