Bluetooth is mainly used for data exchange; add new
features to smart phones. Bluetooth technology, created by
telecom vendor Ericsson in 1994[1], shows its advantage
by integrating with smart phones. It has changed how
people use digital device at home or office, and has
transferred traditional wired digital devices into wireless
devices. A host Bluetooth device is capable of
communicating with up to seven Bluetooth modules at
same time through one link [2].