ContentDesk) September 7, 2005 — Much equipment still has a RS232 serial port as the main data transfer method. Even new equipment can have serial ports because they are easy and cheap to implement, most microcontrollers support them efficiently and designers know how to use them. Also, data can be transferred reasonably fast at 115Kbps, which is sufficient for most purposes.The type of equipment involved includes shop tills, bar code scanners, weighing scales, sensors, medical instruments, industrial machines and other systems that need control information or collect data.

PCs and PC networks and the standard serial connection has commonly been replaced by Serial to Ethernet converters, also known as Serial Device Servers, for a long time.Now though, an 802.11 wireless Serial Device Server is available as well. This new product allows existing serial port equipment to be connected to a network using wireless rather than network cables. This obviously has benefits in reduced cabling needs, more freedom for equipment location and speed of installation but could give problems of expense and security vulnerability.

WEP (Wireless Equivalent Privacy) to ensure that communications remain safe. Additionally, they can be configured to work in different modes to suit the application. If a single point to point communication is all that is needed, then the units can be set in Ad-hoc mode and function as a wireless serial lead. But, if multiple connections are required or a wireless network already exists, then they can be configured in infrastructure mode so that they can link through any standard wireless access point.

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