Casio DT-X7 Series Software Manual page 109

2.6.7 Process after Communication Interruption
With Bluetooth communication, there is a chance that the communication link may be interrupted
due to radio wave conditions in air. An error occurred during the communication is detected by
carrying out WriteFile API function or ReadFile API function, etc.
In case where the communication is interrupted, carry out the normal Bluetooth interruption
process using the Bluetooth tool or in application and then retry to establish the same connection
for communication. If the normal Bluetooth interruption process is not made, unconformity in the
Bluetooth stack will occur so that the lower layer is disconnected whereas the upper layer is still
being connected causing the retry of establishing the connection is not possible.
2.6.8 Process During Suspend and Resume
When the terminal goes into suspend mode while Bluetooth is being used, the power to the
Bluetooth module integrated in the terminal will be automatically turned off. After that, when the
terminal resumes operation mode, the power to the Bluetooth module will be also turned on
automatically. Once the power is turned off, all the parameters related to Bluetooth
communication return to their initial states. These parameters must be set again in the Bluetooth
module by initializing the Bluetooth stack. If the Bluetooth tool is used, it will automatically
detect "suspend" and "resume" modes, and automatically initialize the Bluetooth stack. Note,
however, that if WakeOn Bluetooth function has been set enabled, the power to the Bluetooth
module will remain on even if suspend is carried out. This will not initialize the Bluetooth stack.
2.6.9 Setting SR Mode Parameter
When carrying out Bluetooth communication, the connection will be established by transmitting
radio waves by master Bluetooth equipment to client (slave) Bluetooth equipment. Note that it
may take time sometime to make the establishment depending on a type of the partner Bluetooth
equipment. Here, by altering the SR mode parameter (used in Bluetooth connection), radio waves
sent out when the master Bluetooth equipment makes the establishment will change, and may
reduce the time required to establish the communication. The SR mode parameter can be set in the
following registry.
[HKEY_CURRENT_USER\SOFTWARE\RXBT\HCI]
Table 2.76
DEFAULT_PAGE_SCAN_REP_MODE dword: 0 or 1 or 2
Notes:
• Change the SR mode parameter prior to establishing Bluetooth connection.
• Even if the SR mode parameter is changed, the time required to establish connection with the
partner Bluetooth equipment may not be reduced.
Key Setting Value
109
Description
0: R0, 1: R1, 2: R2