User`s manual

User manual Version 1.3

SW5002 Wireless Serial Server

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4. Application Connectivity

SW5002 provides Tunneling and Virtual COM operation mode. The SW5002 is designed to transmit data

between one-or-more serial devices to/from one-or-more TCP/IP devices through wireless or wire Ethernet,

so SW5002 can enhance the accessibility of the serial device through the ubiquitous TCP/IP based

Ethernet. The connection distance limit is overcome by SW5002. Examples of these devices are PLC

controllers, card readers, display signs, security controls, CNC controller, etc.

4.1. TCP & UDP Protocols

SW5002 can be operated in two most common protocols TCP and UDP.

4.1.1. Transmission Control Protocol (TCP)

TCP provides a connection and a byte oriented data stream with control parameters such as flow control,

multiple ports option, and order delivery notification. Once the connection is established, data can be

transmitted in both directions. TCP guarantees data is transmitted from one node to the other node(s) in

orderly. The protocol also distinguishes the transmitted data for different applications (such as a Web server

or an Email server) on the same computer.

For redundant or dual-network connectivity purposes, SW5002 offers two TCP operation Modes so

users may choose for their specific application, TCP Server Mode and TCP Client Mode.

4.1.2. User Datagram Protocol (UDP)

UDP is a faster datagram delivery protocol. User can configure SW5002 to work in the UDP mode. UDP is

connectionless protocol and can transmit multicast data to/from a serial device to one/multiple host

computer. Because UDP is the connectionless protocol, UDP does not guarantee the reliability and orderly

data streams like TCP protocol. Datagram may arrive out of order or lose without notice. But the advantage

of UDP is the speed. UDP is faster and hence more attractive in time-sensitive applications.

4.2. Connectivity Topology

SW5002 is also equipped with Tunneling and Virtual COM operation modes. It is designed to transmit

data to/from multiple serial devices and from/to multiple TCP/IP devices on Ethernet, so it can enhance the

accessibility of the serial devices immensely. Fig 4. is the example of SW5002 connection topology.

Fig 4. Typical Topology of SW5002 Connection