WE-CUW product introduction and ZigBee protocol introduction

I. WE-CUW Product Introduction

WE-CUW series products is a Digi XBee wireless communication module embedded in the XBee UART adapter, can realize the function of the serial port to wireless communication through the bottom of the toggle switch switch, can support the RS232 or RS485 interface to 2.4GHz wireless communication conversion.XBee UART adapter provides with any RS232/485 serial devices with short-range wireless connection to any RS232/485 serial device. Unlike embedded wireless modules that require design integration and development time, these off-the-shelf adapters provide instant wireless connectivity to existing RS232/485 serial devices.

II. WE-CUW Product Features

• Wide voltage supply 9~28V;
• Supports one or both of RS232 or RS485, single serial port mode, serial port can be selected by switching the bottom toggle switch, baud rate range 9600bps~115200bps;
• Compatible with Zigbee, 802.15.4 or DigiMesh 2.4 firmware;
• The product can use Digi's XBee configuration and testing software XCTU to configure the XBee module within the product, and supports remote configuration of wireless devices through this product, convenient operation.

The XBee UART adapter is compatible with Zigbee, 802.15.4 or DigiMesh 2.4 firmware. If the network is running a different protocol than the one the XBeeUART adapter is programmed for, it will not be able to connect to the network. Changing the firmware on the XBee UART adapter can be accomplished at the same time as modifying the programming protocol by using XCTU, Digi's software for XBee configuration and testing.

Three, WE-CUW specifications and parameters

IV. Introduction of ZigBee protocol

ZigBee is a wireless technology developed as an open connectivity standard for the global market to address the unique needs of low-cost, low-power wireless IoT data networks.The ZigBee connectivity standard operates on the IEEE 802.15.4 Physical Board Radio Specification and operates in unlicensed radio bands that include 2.4 GHz, 900 MHz and 868 MHz.

ZigBee 3.0 protocol

The Zigbee protocol was created and approved by the member companies of the Zigbee Board of Directors Alliance.More than 300 market-leading semiconductor manufacturers, technology companies, OEMs, and service companies comprise the Zigbee Alliance Membership Council.The Zigbee protocol is designed to provide an easy-to-use wireless data solution featuring a secure, reliable wireless network architecture.

V. Advantages of ZigBee

The ZigBee 3.0 protocol is designed to communicate data over the noisy RF environments common to commercial and industrial market applications. version 3.0 builds on the existing Zigbee connectivity standard, but unifies market-specific application profiles so that all devices can connect wirelessly on the same network, regardless of their market name and capabilities. In addition, the ZigBee 3.0 certification program ensures interoperability of products from different device manufacturers. Connecting ZigBee 3.0 networks to the IP realm opens up wireless monitoring and control of radio devices such as smartphones and tablets from LANs or WANs (including the Internet), enabling a true Internet of Things.

Features of the ZigBee protocol include

• Supports a variety of network topologies, such as point-to-point, point-to-multipoint and mesh networks
• Low duty cycle - provides long battery life
• low latency
• Direct Sequence Spread Spectrum (DSSS)
• Up to 65,000 nodes per network
• Secure data connections with 128-bit AES encryption
• Avoiding collisions, retries and confirmations

The ZigBee 3.0 software stack includes an "infrastructure" that provides consistent behavior for commissioning nodes and devices into the network. A common set of debugging methods is provided, including Touchlink, a proximity debugging method.

ZigBee Wireless Security

ZigBee 3.0 provides enhanced network security. There are two security methods that produce two types of networks.

• Centralized Security. This approach employs a coordinator/trust center that forms the network and manages the distribution of network and link security keys to the joined nodes.
• Distributed Security. This approach has no coordinator/trust center and is formed by routers. Any ZigBee router node can subsequently provide network keys to the joining nodes.

Nodes adopt whatever security methods are used by the hub networks they join.ZigBee 3.0 supports the growing size and complexity of wireless networks and can cope with large local networks of more than 250 nodes.ZigBee also handles the dynamic behavior of these networks (nodes appearing, disappearing, and reappearing in the network) and allows orphaned nodes resulting from the loss of a parent to rejoin the network through a different parent nodes to rejoin the network.The self-healing nature of ZigBee mesh networks also allows nodes to exit the network without causing any disruption to internal routing.

ZigBee protocol compatibility

The backwards compatibility of ZigBee 3.0 means that applications and smart home devices already developed under the Zigbee Light Link 1.0 or Home Automation 1.2 profiles are already available for ZigBee 3.0.The ZigBee Smart Energy profile is also compatible with ZigBee 3.0 on a functional level, but Smart Energy has additional security requirements that are only addressed within the profile.

ZigBee Device Data

ZigBee's over-the-air (OTA) upgrade feature performs software updates during device operation, ensuring that applications on devices already deployed in the field/marketplace can be seamlessly migrated to ZigBee 3.0. OTA upgrades are an optional feature, and manufacturers are encouraged to support them in the application layer of their ZigBee products.

ZigBee mesh network

A key component of the ZigBee protocol is the ability to support mesh networks. In a mesh network, nodes are interconnected with other nodes so that each node has multiple path connections. Connections between nodes are dynamically updated and optimized through complex, built-in mesh routing tables.
Mesh networks are decentralized in nature; each node is capable of self-discovery on the network. In addition, when a node leaves the network, the mesh topology allows the node to reconfigure its routing paths based on the new network structure. The characteristics of mesh topology and ad hoc routing provide greater stability during changing wave conditions or failure of a single node.

ZigBee Wireless Applications

ZigBee enables the deployment of wireless networks across a wide range of bands with a low-cost, low-power solution. It provides the ability to run on inexpensive batteries for years for a large number of monitoring and control applications. Smart energy/smart grid, AMR (automated meter reading), lighting control, building automation systems, tank monitoring, HVAC control, medical devices, dbm radios, ghz wireless protocols, wireless sensor networks, and fleet applications are just a few of the many areas in which ZigBee technology is making significant progress.

VI. Hainan Shidian

Hainan Shidian Technology Co., Ltd. to "make the standardization of industrial Internet of Things easier" as the vision, focusing on the direction of the Internet of Things industry chain, indoor positioning, sensing and control and data transmission products in the field of continuous research and development, Lego (Lego) production, precise to meet the small amount of industrial Internet of Things products and a variety of demand characteristics, to provide customer Complex environment and personalized needs to meet the real low inventory, high satisfaction of the new supply and demand relationship.

The company has four R&D centers in Shanghai, Suzhou, Chengdu and Taipei, adhering to the group's nearly 40 years of good business resources and reputation, firmly believe in the "be an expert in the industry" business philosophy, precise in the channel, sensitive to the market, focus on products, "research" is reliable, "production" is stable, "sales" is quality, always focusing on the industrial Internet of Things customers personalized scenarios to meet the ultimate needs. We believe in the business philosophy of "being an expert in the industry", we are precise in channels, sensitive to the market, and focus on products, "research" is reliable, "production" is stable, "sales" is quality, and we are always focusing on the ultimate satisfaction of personalized scenarios of industrial IoT customers.

In terms of products, we have both Zigbee positioning products, which have been cultivated by our self-research team for more than 10 years, and UWB positioning products, which are developed by our teams in Shanghai and Taipei, to meet the different needs of customers for positioning accuracy. At the same time, the company also introduces Bluetooth positioning products to supplement the self-developed solutions, in order to fully meet the needs of all kinds of customers.

Software support we integrate the overall program of various industries, actively open interfaces and source codes for system integrators to join, for related system software companies to do case demonstration based on our products to provide convenience, so that the Internet of Things indoor positioning applications broader.