SENA Promi-ESD02 - Manual (Page 15)

Promi-ESD User Manual – Configurations 15
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-ESD has some configurations for Bluetooth. For
getting the most out of Promi-ESD, 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 devices. 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 of 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-ESD has 4 operation modes as follows.
 MODE 0
Promi-ESD 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-
ESD is just waiting for AT command input. Neither master nor slave is assigned
to Promi-ESD in mode0. User can change the configurations of Promi-ESD in
this mode.
The factory default is set to Mode0.
 MODE 1
Promi-ESD tries to connect the last connected Bluetooth device.
Promi-ESD in Mode1 is to be a master and tries to connect the last connected
Bluetooth device. Promi-ESD always stores the BD address of the Bluetooth
device to which Promi-ESD has connected last time. When Promi-ESD is
initially used or after hardware reset, there is no BD address stored in Promi-
ESD. 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-ESD succeeds to connect to other Bluetooth device in Mode0.
Once changed to Mode1, Promi-ESD will try to connect automatically the last
connected Bluetooth device whenever power on or software reset.
Promi-ESD in Mode1 cannot be discovered or connected by other Bluetooth
devices.