Implementation of smart class room using WAGO PLC

With the increase in room energy demand both energy management and sustainable energy systems are used in smart rooms, which provides automatic control and monitoring of various room appliances. Smart room is a room that enables user to have high-level comfort with efficient use of electricity. This paper proposes a class room automation by considering human comfort and use of solar power as a renewable source of power. WAGO programmable logic controller (PLC) is used to provide solution for automatic control and monitoring of class room appliances such as lights, fan, air conditioning (AC) and projector. Arduino uno is also used as data acquisition device which is programmed to acquire sensor data and generate output signal in accordance to input of WAGO PLC. Real time status of various input sensors, and electrical appliances can also be monitored through PLC Ethernet gateway on PC as well as wirelessly on smart phone through Wi-Fi. Class room appliances will turn ON to provide workable environment only when occupancy is detected by PIR sensors. The room automation system consist of sensors (PIR sensor, Temperature sensor, and lux sensor), Wago PLC, arduino uno, Wi-Fi router, photovoltaic panels and solar charge controller.