SENA Promi-SD 205 - Manual (Page 16)

Promi-SD User Manual – 2. Configurations 12
Copyright © 2006 Sena Technologies, Inc. All rights reserved.
Operation Modes
In addition to the serial port configurations such as bit/second, data bit, parity, stop bit, flow control, Promi -SD has some
configurations for Bluetooth. For getting the most out of Promi-SD, user should understand the following Bluetooth
connection schemes.
A Bluetooth device can play a role as a master or slave. Master tries to connect itself to other Bluetooth device, and
slave is waiting to be connected from other Bluetooth devic es. A Bluetooth connection is always made by a pair of
master and slave. A slave can be in two modes, Inquiry Scan or Page Scan mode. Inquiry Scan mode is waiting the
packet of inquiry from other Bluetooth devices and Page Scan mode is waiting the packet o f connection from other
Bluetooth devices. Every Bluetooth device has its unique address, called BD (Bluetooth Device) address, which is
composed of 12 hexa-decimal numbers.
Promi -SD has 4 operation modes as follows. Each mode can be identified with LED indicators as illustrated in next
section.
 Mode0
Promi -SD must be in Mode0, when it is directly controlled by AT commands.
In this mode, there is no response when power on or software reset, and Promi-SD is just waiting for AT command input.
Neither master nor slave is assigned to Promi-SD in mode0. User can change the configurations of Promi-SD in this mode.
The factory default is set to Mode0.
 Mode1
Promi -SD tries to connect the last connected Bluetooth device.
Promi -SD in Mode1 is to be a master and tries to connect the last connected Bluetooth device. Promi-SD always stores
the BD address of the Bluetooth device to which Promi -SD has connected last time. When Promi-SD is initially used or
after hardware reset, there is no BD address stored in Promi-SD. In this case, Mode1 does not make any sense and
mode change from other operation modes to Mode1 is not allowed. The mode change to Mode1 can be made after
Promi -SD succeeds to connect to other Bluetooth device in Mode0. Once changed to Mode1, Promi-SD will try to
connect automatically the last connected Bluetooth device whenever power on or software reset.
Promi -SD in Mode1 cannot be discovered or connected by other Bluetooth devices.
 Mode2
Promi -SD is waiting for the connection from the last connected Bluetooth device.
Promi -SD in Mode2 is to be a slave and waiting for the connection only from the last connected Bluetooth device. Just
like Mode1, if there is no BD address stored in Promi -SD, the mode change from other operation modes to Mode2 is not
allowed. O nce changed to Mode2, Promi-SD will wait for the connection from the last connected Bluetooth device
whenever power on or software reset.
Promi -SD in Mode2 cannot be discovered or connected to Bluetooth devices other than the last connected device.
 Mode3
Promi-SD is waiting for the connection from any other Bluetooth devices.
Promi -SD in Mode3 acts like in Mode2, but allows any connection from other Bluetooth device. Most of general
Bluetooth device is set to Mode3.
Promi -SD in Mode3 can be discovered and connected from any other Bluetooth devices.