User manual

User manual Version 1.0

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