The book has been written in such a way that the concepts are explained in detail, giving adequate emphasis on circuits and code examples. To make the topics more comprehensive, circuit diagrams, photographs, and code samples are furnished extensively throughout the book. The book is conceptualized and written in such a way that the beginner readers will find it very easy to understand and implement the circuits and programs. \nThe book features the most current popular hardware components and associated software with it. This book teaches novice beginners how to create interesting IoT projects with Arduino Ecosystem. The book will also be helpful to experienced professionals to make the transition to careers in Arduino and IoT.