Based on NIELIT ‘O’ Level Revised Syllabus of the year 2020 for Module 4 (M4-R5) Key FeaturesAmple number of diagrams are used to illustrate the subject matter for easy understanding. Set of review questions with answers are added at the end of each chapter. A set of solved and unsolved papers are also included to enable the readers to get a feel of the questions likely to be asked in the examination. DescriptionThis book covers the entire syllabus for Module-4, namely the Internet of Things and Its Applications, in a clear and simple style. Each concept in the book is illustrated with practical examples, and the tested output of programs are also provided. The book elucidates both basic and advanced topics in “IoT.” The book presents a detailed discussion on the Internet of Things and Its Applications/Devices, Protocol, and Communication model. Also, comprehensive coverage of various aspects of IoT and Arduino concepts are done. Different topics such as Sensors, Actuators, Microcontrollers, Security, and Future of IoT Ecosystem are explained in very easy to understand language. In addition, Personality development is covered to enhance skills set towards better personality development and maintain a positive outlook in life.Also, many solved, and unsolved examples are provided at the end of each chapter. An effort is made to explain all the topics in the layman’s language with the large number of illustrations and examples.What will you learnInternet of Things, Building IoT Applications Things and Connections, Sensors, Actuators and Microcontrollers Security and Future of IoT Ecosystem Soft skills-Personality Development