User's Guide

16
3. Configuration
3.1. Operation Modes
In addition to the serial port configurations the WCS-232 also requires some settings for Bluetooth. For
getting the most out of WCS-232, 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
devices, and slave is waiting to be connected from other Bluetooth devices. A Bluetooth connection is
always made by a pair of master and slave devices. A slave can be in two modes, Inquiry Scan or Page
Scan mode. Inquiry Scan mode is waiting for a packet of inquiry from other Bluetooth device and Page
Scan mode is waiting for a packet of connection from other Bluetooth device. Every Bluetooth device
has its unique address, called BD (Bluetooth Device) address, which is composed of 12 hexa-decimal
numbers.
WCS-232 has 4 operation modes as follows. Each mode can be identified with LED indicators as
illustrated in next section.
Table 3-1 The WCS-232 Operation Modes
Mode
Description
Mode0
In this mode, there is no response when power on or software reset, and WCS-232 is just
waiting for AT command input. Neither master nor slave is assigned to WCS-232 in mode0.
User can change the configuration parameters of WCS-232 in this mode.
WCS-232 must be in Mode0, when it is directly controlled by AT commands.
The factory default is set to Mode0.
Mode1
WCS-232 tries to connect the last connected Bluetooth device.
WCS-232 in Mode1 is to be a master and tries to connect the last connected Bluetooth device.
WCS-232 always stores the BD address of the Bluetooth device to which WCS-232 has
connected last. When WCS-232 is initially used or after hardware reset, there is no BD
address stored in WCS-232. In this case, Mode1 will not be able to work properly. The mode
change to Mode1 can be made after WCS-232 succeeds to connect to one other Bluetooth
device. Once changed to Mode1, WCS-232 will try to connect automatically the last connected