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What is Temperature and Humidity Sensor

Chapter 12
Handbook of Research on the IoT, Cloud Computing, and Wireless Network Optimization
DHT11 is basic temperature and capacitive humidity sensor which works on 3-5 V power. The output data of this sensor is digital and which is why we are using this module in the chapter with raspberry pi so that it easy for raspberry pi to get information from sensors. It is simple to use and will need time to acquire data from the sensors (see Figure 16 in appendix). In this proposed work, temperature and humidity sensor is used for switching on/off fans or AC automatically when temperature or humidity goes low/high respectively.
Published in Chapter:
Home Automation and Security System Using Internet of Things
Mahesh Kushwah (National Institute of Technology Jalandhar, India) and Rajneesh Rani (National Institute of Technology Jalandhar, India)
Copyright: © 2019 |Pages: 24
DOI: 10.4018/978-1-5225-7335-7.ch012
Abstract
The internet of things (IoT) is viewed as something that connects everyday objects like smart TV and smart phones. Automation is the future of human civilization. It's like operating various devices and machinery with minimum or no human intervention. In this chapter, home appliances and other electronic devices are proposed to be controlled over internet with the help of website or smartphone. Speech recognition technology has been implemented in this chapter which will help complete or partially visually impaired people or persons with physical disability. Smart CCTV concept has been developed in this chapter which will allow to operate the web camera whenever it detects motion and sleep at other times which will save energy as well as storage unlike current CCTV scenario. Also, smart CCTV captures images and video footage and provides the real-time status of the place via a registered email address, website, and mobile app. If you are outside, you can check the status of your home and be in line with it, and you will activate the home appliances from the web site and through speech.
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