Different types of communication modules. Wi-Fi modules can achieve high-speed wireless LAN connection and are widely used in various smart devices to achieve network access. Bluetooth modules are used for data transmission and connection between short-range devices, such as Bluetooth headsets. RF modules cover a wide range of radio frequency communication fields and can be used in a variety of wireless communication scenarios. LoRa modules are suitable for long-range IoT applications due to their long-range and low-power communication characteristics. Zigbee modules are often used for device networking in smart home and other fields. NB-IoT modules rely on narrowband IoT technology and are suitable for low-power wide-area connections of large-scale IoT devices. Switch Modules may be used for functions such as signal switching. Radar modules may involve radar-related signal processing and transmission, and have applications in detection and other fields. These modules each have unique performance and applicable scenarios, and together promote the development of wireless communications and IoT and meet the communication and functional requirements in different scenarios.