Developers, manufacturers and marketers of products incorporating short-
range radio systems are experts in their fields—security, telemetry,
medical care, to name a few. Often they add a wireless interface just to
eliminate wires on an existing wired product. They may adapt a wireless
subsystem, which is easy to integrate electrically into their system, only to
find that the range is far short of what they expected, there are frequent
false alarms, or it doesn’t work at all. It is for these adapters of wireless
subsystems that this book is primarily intended.
