Smart Machine Smart Decision
SIM800 Series_Bluetooth_Application_V1.02
6
2014-06-30
1.
Bluetooth Function
1.1.
Bluetooth Introduction
Bluetooth is a wireless technology standard for exchanging data over short distances (using
short-wavelength radio transmissions in the ISM band from 2400–2480 MHz) from fixed and
mobile devices, creating prsonal area networks (PANs) with high levels of security.Bluetooth was
standardized as IEEE 802.15.1
1.2.
Bluetooth Profile
To use Bluetooth wireless technology, a device has to be able to interpret certain Bluetooth
profiles, which are definitions of possible applications and specify general behaviors that
Bluetooth enabled devices use to communicate with other Bluetooth devices. These profiles
include settings to parametrize and to control the communication from start. Adherence to profiles
saves the time for transmitting the parameters anew before the bi-directional link becomes
effective. There are a wide range of Bluetooth profiles that describe many different types of
applications or use cases for devices.
Besides of all profiles, there have four basic ones, they are GAP/SDAP/SPP/GOEP Profile.
1.3.
Bluetooth Device Address
The Bluetooth device address stores the network address of a Bluetooth–enabled device. It is used
to identify a particular device during operations such as connecting to, pairing with, or activating
the device.
A Bluetooth–enabled device address is a unique, 48 bits address containing the following three
fields:
•
LAP field: lower part of the address containing 24 bits.
•
UAP field: upper part of the address containing 8 bits.
•
NAP field: non–significant part of the address containing 16 bits.
The LAP and the UAP represent the significant address part (SAP) of the Bluetooth device
address.
1.4.
AT Interface for Bluetooth Function
As module solution, we provide series of AT interface to operate Bluetooth function, including
pairing, bonding, pushing or receiving file.
Also including interface for SPP service, which could communicate between Bluetooth device and
others via serial port.
