Wireless connectivity to legacy serial devices is the forte of the SSEWW-100L line of serial-to-WiFi device servers. Priced at $599, these servers handle a single RS-232 channel. The company provides virtual serial drivers for operating systems such as Windows XP and Linux, allowing host applications to use a remote serial device. A free software developer's kit provides access to features such as Raw TCP mode.
Quatechwww.quatech.com