Internet of Things & Wireless Sensor Network
By Ajit Singh
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About this ebook
This book is ideal for networking designers and engineers who want to fully exploit the IoT with Sensor Network who are concerned about design, integrate and implement the IoT with Sensor Network. It helps reader to discover the emerging field of low-cost standards-based sensors that promise a high order of spatial and temporal resolution and accuracy in an ever-increasing universe of applications. This book is a broad introduction of all the major technology, standards, protocol and application topics related to IoT and WSN.
Ajit Singh
Ajit Singh is equally interested in fiction and non-fiction and has written many books in English, Hindi, and Urdu. He has performed in Haryana, published his prose and verse in India and Pakistan, and participated in an international online poetry symposium organized by Bazm-e-Urdu, Qatar.He lives in a village, teaches science, and comes from a farming family. His father served as a major in the Parachute Regiment of the Indian Army.Ajit plays cricket, football, volleyball, basketball, badminton, and chess. He loves harmonium and flute, sings folk songs, and also enjoys gardening in his spare time. His nickname is "Badal," which means "cloud" in English.
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Internet of Things & Wireless Sensor Network - Ajit Singh
Chapter 1 - Introduction to the IoT
Internet Of Things(IoT)
The Internet of Things(IoT) can be defined as a network of physical objects or people called things
that are embedded with software, electronics, network, and sensors which allows these objects to collect and exchange data.
The goal of IoT is to extend to internet connectivity from standard devices like computer, mobile, tablet to relatively dumb devices like a toaster. IoT makes virtually everything smart,
by improving aspects of our life with the power of data collection, AI algorithm, and networks.
The thing in IoT can also be a person with a diabetes monitor implant, an animal with tracking devices, etc.
IoT Key Features
Figure 1
History of IOT
1970- The actual idea of connected devices was proposed
1990- John Romkey created a toaster which could be turned on/off over the Internet
1995- Siemens introduced the first cellular module built for M2M
1999- The term Internet of Things
was used by Kevin Ashton during his work at P&G which became widely accepted
2004 - The term was mentioned in famous publications like the Guardian, Boston Globe, and Scientific American
2005-UN's International Telecommunications Union (ITU) published its first report on this topic.
2008- The Internet of Things was born
2011- Gartner, the market research company, include The Internet of Things
technology in their research
How IOT works
The entire IOT process starts with the devices themselves like smartphones, smartwatches, electronic appliances like TV, Washing Machine which helps you to communicate with the IOT platform.
Figure 2:
Here, are four fundamental components of an IoT system:
1) Sensors/Devices: Sensors or devices are a key component that helps you to collect live data from the surrounding environment. All this data may have various levels of complexities. It could be a simple temperature monitoring sensor, or it may be in the form of the video feed.
A device may have various types of sensors which performs multiple tasks apart from sensing. Example, A mobile phone is a device which has multiple sensors like GPS, camera but your smartphone is not able to sense these things.
2) Connectivity: All the collected data is sent to a cloud infrastructure. The sensors should be connected to the cloud using various mediums of communications. These communication mediums include mobile or satellite networks, Bluetooth, WI-FI, WAN, etc.
3) Data Processing: Once that data is collected, and it gets to the cloud, the software performs processing on the gathered data. This process can be just checking the temperature, reading on devices like AC or heaters. However, it can sometimes also be very complex like identifying objects, using computer vision on video.
4)User Interface: The information needs to be available to the end-user in some way which can be achieved by triggering alarms on their phones or sending them notification through email or text message. The user sometimes might need an interface which actively checks their IOT system. For example, the user has a camera installed in his home. He wants to access video recording and all the feeds with the help of a web server.
However, it's not always one-way communication. Depending on the IoT application and complexity of the system, the user may also be able to perform an action which may create cascading effects.
For example, if a user detects any changes in the temperature of the refrigerator, with the help of IOT technology the user should able to adjust the temperature with the help of their mobile phone.
IoT Applications
IoT solutions are widely used in numerous companies across industries. Some most common IoT applications are given below:
Figure 3
Smart Thermostats - Helps you to save resource on heating bills by knowing your usage patterns.
Connected Cars - IOT helps automobile companies handle billing, parking, insurance, and other related stuff automatically.
Activity Trackers - Helps you to capture heart rate pattern, calorie expenditure, activity levels, and skin temperature on your wrist.
Smart Outlets - Remotely turn any device on or off. It also allows you to track a device's energy level and get custom notifications directly into your smartphone.
Parking Sensors - IOT technology helps users to identify the real-time availability of parking spaces on their phone.
Connect Health - The concept of a connected health care system facilitates real-time health monitoring and patient care. It helps in improved medical decision-making based on patient data.
Smart City - Smart city offers all types of use cases which include traffic management to water distribution, waste management, etc.
Smart home - Smart home encapsulates the connectivity inside your homes. It includes smoke detectors, home appliances, light bulbs, windows, door locks, etc.
Smart supply chain - Helps you in real time tracking of goods while they are on the road, or getting suppliers to exchange inventory information.
Challenges of IoT
At present IoT is faced with many challenges, such as:
Insufficient testing