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8.2 Factory Default Mode
The module is capable of operating at a very wide range of baud rates
and S Registers 520 and 521 allow the baud rate to be set very easily.
The baud rate clock generator in the module is more versatile that that
available in a standard 16550 UART commonly available in PCs.
In fact, as long as the equation BAUDRATE * 0.004096 produces an
integer value, then there will be 0% error in clocking for that baud rate.
So it is possible to set a baud rate that a PC cannot cope with, and in
that circumstance it is virtually impossible to communicate with it.
To cater for this circumstance, the blu
2i
module will come out of reset
using 9600,N,8,1 comms settings for exactly 750 milliseconds and then
revert to the comms parameters as per the S Registers.
If the host sends the string !<BISM>!<cr> where <cr> is the carriage
return character within that 750ms period, then the module will remain at
9600,N,8,1 and will also configure itself using factory default S Register
values.
Please see the next section for a discussion on Terminal Emulators and
how you can obtain a terminal emulator which has this ‘reset’ feature
built in.
8.3 Software
The Bluetooth Module described in this document uses the serial
interface to accept commands and provide responses. While in
command mode all interaction between it and a host is done purely in
text mode. This means that virtually all terminal emulators available are
adequate for testing and prototyping. HyperTerminal, Procomm or the
TDK Terminal application supplied are all suitable terminal emulators.
TDK Terminal is a terminal emulation application capable of running on
Windows 98, Me, 2000 and XP operating systems. It was developed
specifically to aid development and testing of the blu
2i
Module. It allows
connection to serial devices using any combination of the following
communications parameters:
COM Port: 1 to 255
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