Book Image

Internet of Things for Architects

By : Perry Lea
Book Image

Internet of Things for Architects

By: Perry Lea

Overview of this book

The Internet of Things (IoT) is the fastest growing technology market. Industries are embracing IoT technologies to improve operational expenses, product life, and people's well-being. An architectural guide is necessary if you want to traverse the spectrum of technologies needed to build a successful IoT system, whether that's a single device or millions of devices. This book encompasses the entire spectrum of IoT solutions, from sensors to the cloud. We start by examining modern sensor systems and focus on their power and functionality. After that, we dive deep into communication theory, paying close attention to near-range PAN, including the new Bluetooth® 5.0 specification and mesh networks. Then, we explore IP-based communication in LAN and WAN, including 802.11ah, 5G LTE cellular, Sigfox, and LoRaWAN. Next, we cover edge routing and gateways and their role in fog computing, as well as the messaging protocols of MQTT and CoAP. With the data now in internet form, you'll get an understanding of cloud and fog architectures, including the OpenFog standards. We wrap up the analytics portion of the book with the application of statistical analysis, complex event processing, and deep learning models. Finally, we conclude by providing a holistic view of the IoT security stack and the anatomical details of IoT exploits while countering them with software defined perimeters and blockchains.
Table of Contents (18 chapters)
Title Page
Packt Upsell
Contributors
Preface
Free Chapter
1
The IoT Story

Sensor fusion


One aspect that needs consideration with all the sensor devices described in this chapter is the concept of sensor fusion. Sensor fusion is the process of combining several different kinds of sensor data to reveal more about context than a single sensor can provide. This is important in the IoT space, since a single thermal sensor has no notion of what causes a rapid temperature change. However, when combined with data from other sensors nearby that look at PIR motion detection and light intensity, an IoT system could discern that a large number of people are congregating in a certain area while the sun is shining, and could then make the decision to increase air circulation in a smart building. A simple thermal sensor only records the current temperature value, and has no contextual awareness that the heat is rising due to people congregating and sunlight shining.   

With time-correlated data from multiple sensors (edge and cloud), processing can make better decisions based...