Bluetooth Mesh technology has gained significant attention among engineers due to its open standards, low cost, and high performance. It addresses the limitations of traditional low-power Bluetooth, which lacks the ability to form networks in real-world applications. By supporting mesh networking, Bluetooth Mesh enables more robust and scalable connectivity, making it increasingly suitable for building automation and other complex systems. One of the key components of a Bluetooth Mesh network is the "node." A node is an individual device that can communicate with others within the network. SKYLAB will explore the different types of nodes in detail, explaining how they work together to create a reliable and secure communication environment. The Bluetooth Mesh specification outlines four main types of nodes: relay nodes, proxy nodes, low-power nodes (LPNs), and friend nodes. Each plays a specific role in maintaining the functionality and efficiency of the network. A **relay node** is responsible for receiving and retransmitting messages across the network, helping to extend the range and coverage of the mesh. This allows data packets to propagate efficiently through the network. However, this process requires the node to remain active, which increases power consumption. A **proxy node** acts as a bridge between devices that support Bluetooth Low Energy (BLE) but not Bluetooth Mesh, such as smartphones. It enables these devices to interact with the mesh network using the GATT interface, making it easier to integrate existing devices into the system. A **low-power node (LPN)** is designed to minimize energy usage by operating with a very low receiver duty cycle. It only activates its receiver when necessary, significantly reducing power consumption. LPNs achieve this by forming a "friendship" relationship with a **friend node**, which stores messages intended for the LPN until it is ready to receive them. This setup ensures that battery-powered or energy-harvesting devices can function effectively in a mesh network without draining their power too quickly. The friend node remains active, acting as a cache for messages, while the LPN sleeps most of the time, waking up periodically to check for new data. By incorporating these different node types, Bluetooth Mesh provides a flexible and efficient solution for large-scale wireless communication. It supports applications ranging from smart homes and building automation to industrial environments and city-wide sensor networks. With the ability to connect thousands of devices seamlessly, Bluetooth Mesh opens up new possibilities for IoT-based solutions. SKYLAB's BLE module, the **SKB369**, is designed to take full advantage of Bluetooth Mesh technology. It enables centralized control of all smart home functions through a single device, offering both convenience and efficiency. The architecture of Bluetooth Mesh is also scalable, making it ideal for use in offices, factories, and even entire cities, where millions of nodes can be connected without compromising performance.

Heat Shrink Tube

Heat-shrinkable tubing is a special heat-shrinkable sleeve made of polyolefin. The outer layer is made of high-quality soft cross-linked polyolefin material and the inner layer of hot melt adhesive composite processing and become, the outer layer of material has the characteristics of insulation, corrosion and abrasion resistance, etc., and the inner layer has the advantages of low melting point, waterproof sealing and high adhesive properties.

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