A Collection of Contemporary Research Articles in Electronics, Communication & Computation- Book ISBN- 978-81-948050-7-6

Authors: Priya Rahul, Arpita Ghosh

Abstract: The Internet of Things is one of the ideas that have become increasingly relevant in recent years. It involves connecting things to the Internet in order to retrieve information from them at any time and from anywhere. In the Internet of Things, sensor networks exchange information wirelessly, and in this sense, our paper presents a way in which each classroom control is accessed through Near Field Communication (NFC), and the information is shared via radiofrequency. In our method, we first estimated the devices a classroom consists of (i.e.) fan, light, etc. The smart classroom system that we have designed uses different sensors like DHT11 Temperature and humidity sensor for measuring temperature and humidity of the environment, an LDR sensor module that measures light intensity using a light-dependent resistor and an Ultrasonic distance sensor for counting the number of attendees at the classroom door by measuring object distance based on an ultrasonic sound wave. These sensors are integrated with Raspberry Pi 3 enabled with Bluetooth, Wi-Fi and Ethernet connectivity and the data collected from the sensors are sent to the Ubidots IoT cloud platform via MQTT/HTTP application protocol. In order to fetch data from the cloud and implement the control logic for controlling the appliances in the classroom, Python, a high-level programming language, is used. Finally, outputs of the onboard controller can be activated through events from the cloud, such as sending an email to the given mail Id. In this way, our system will make the classroom better than the existing classrooms that are available.

Keywords: IoT, Raspberry Pi 3, Sensors, Smart classroom.