Wireless Sensor Networks (WSNs) have emerged as a transformative technology with profound implications for a wide range of industries and applications, from environmental monitoring to healthcare, smart cities to industrial automation. The rapid proliferation of these networks has underscored the critical need for a comprehensive and accessible resource to help both novice and experienced practitioners navigate the complexities of WSN design, deployment, and management. "Fundamentals of Wireless Sensor Networks" aims to fill this gap by offering a comprehensive and up-to-date introduction to the core principles, key technologies, and practical considerations that underpin WSNs. This book is designed to be a valuable resource for students, researchers, engineers, and professionals seeking to gain a solid foundation in WSNs. It covers essential topics such as sensor node hardware, communication protocols, energy management, data fusion, security, and applications. By combining theoretical insights with practical examples and case studies, this book equips readers with the knowledge and skills necessary to design and deploy effective wireless sensor networks in diverse contexts. Whether you are a student embarking on a journey into the world of WSNs or a seasoned practitioner looking to refresh your knowledge, "Fundamentals of Wireless Sensor Networks" provides the essential groundwork for understanding and harnessing the potential of this transformative technology.