15/07/2015
BLUETOOTH
A Bluetooth
connection is wireless and automatic, and
it has a number of interesting features
that can simplify our daily lives.
THIS IS HOW IT WORKS
When any two devices need to talk to
each other, they have to agree on a
number of points before the conversation
can begin. The first point of agreement is,
Physical: Will they talk over wires, or
through some form of wireless signals?Once the physical
attributes are decided, several more
questions arise:
How much data will be sent at a
time? For instance, serial ports
send data 1 bit at a time, while
parallel ports send several bits
at once.
How will they speak to each
other? All of the parties in an
electronic discussion need to
know what the bits mean and
whether the message they
receive is the same message
that was sent. This means
developing a set of commands
and responses known as a
protocol .