User Manual

Eddy User's Guide
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7.1.2 Operation Mode
In addition to the serial port configurations, the Eddy-BT requires also includes some settings for Bluetooth. For
getting the most out of Eddy-BT, 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 devic
es, 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. Inqui
ry Scan mode is waiting for a packet of inquiry from other Bluetooth device and Page Scan mode is waiting f
or a packet of connection from other Bluetooth device. Every Bluetooth device has its unique address, called B
D (Bluetooth Device) address, which is composed of 12 hexa-decimal numbers.
Eddy-BT has 4 operation modes as follows:
Mode
Description
Mode0
In this mode, there is no response when power on or software reset, and Eddy-BT is just
waiting for AT command input. Neither master nor slave is assigned to Eddy-BT in mode0.
User can change the configuration parameters of Eddy-BT in this mode.
Eddy-BT must be in Mode0, when it is directly controlled by AT commands.
The factory default is set to Mode0.
Mode1
Eddy-BT tries to connect the last connected Bluetooth device.
Eddy-BT in Mode1 is to be a master and tries to connect the last connected Bluetooth
device. Eddy-BT always stores the BD address of the Bluetooth device to which Eddy-BT
has connected last. When Eddy-BT is initially used or after hardware reset, there is no BD
address stored in Eddy-BT. In this case, Mode1 will not be able to work properly. The mode
change to Mode1 can be made after Eddy-BT succeeds to connect to one other Bluetooth
device. Once changed to Mode1, Eddy-BT will try to connect automatically the last
connected Bluetooth device whenever the unit is powered on or software reset.
Eddy-BT in Mode1 cannot be discovered or connected by other Bluetooth devices.
Mode2
Eddy-BT is waits for a connection from the last connected Bluetooth device.
Eddy-BT 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 Eddy-BT,
the mode change from other operation modes to Mode2 is not work properly. Once
changed to Mode2, Eddy-BT will wait for the connection from the last connected Bluetooth
device whenever the unit is powered on or software reset.
Eddy-BT in Mode2 cannot be discovered or connected to Bluetooth devices other than the
last connected device.
Mode3
Eddy-BT is waiting for the connection from any other Bluetooth devices. In Mode 3
the Eddy-BT is discoverable and can be connected to by other Bluetooth devices.