Internet of Things is the synthesis of wireless sensor network, embedded control technology and network technology, and it is a hot spot of application development and research in recent years. Now, Internet of Things related products have been widely used in the field of intelligent sensing and monitoring, and have been widely used in environmental monitoring, smart home, security monitoring, integrated intelligent network, national defense industry, physical information system and other fields. We can foresee that the information age based on the application of Internet of Things has arrived, and it is changing all aspects of our production and life. In order to meet the needs of training professionals in Internet of Things technology, the Ministry of Education set up the Internet of Things major on 20 10, and all major universities in China set up the Internet of Things major and enrolled students. Therefore, there is an urgent need for a textbook suitable for the current development of the Internet of Things, and this book is completed under this background. This book is based on the most popular ARM Cortex? M3 Core 32-bit low-power processor STM32W 108 designs wireless networking and control nodes, and its performance is the highest configuration in wireless sensor network chips at present. This book tries to simplify complex problems. In order to explain a problem, we may spare no effort to use space, charts and examples, so that every beginner in the development of Internet of Things technology can get started quickly and lay a solid foundation for the related design of Internet of Things. The contents of this book are arranged as follows.

Overview of embedded technology and Internet of Things: The overall structure of the Internet of Things is given, its internal functional modules are analyzed, a typical design scheme is given, and its key technologies are summarized. ◆ Arm cortex? M3 Technology: Launching ARM Cortex? M3 technical architecture, kernel module and the latest Thumb? 2. The efficient instruction set is analyzed in detail. ◆ based on ARM Cortex? The application design of 32-bit low-power processor STM32W 108 is adopted. The processor adopts M3 core: stmicroelectronics (ST) chip STM32W 108. Chip architecture, internal memory and RF module, universal io interface, interrupt mechanism, serial communication interface (UART communication and SPI communication), AD converter, interface function of 802. 15.4/ZigBee protocol stack (API interface function), two-node multipoint communication of STM32W 108, multi-sensor environmental parameter monitoring, embedded real-time operating system μCOS. The transplantation of ⅱ, real-time environmental monitoring examples, node positioning methods, large-scale node self-organization and mobile agent navigation technology are analyzed in detail, and specific application development examples and solutions are given.