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6
RN -BT -SR L-U M- 1.0
CONFIGURATION
The Bluetooth adapter operates in two modes: data mode (default) and command mode. While in data mode, the module
is essentially a data pipe. When the module receives data, it strips the Bluetooth headers and trailers and passes the user
data to the UART. When data is written to the UART, the module constructs the Bluetooth packet and sends it out over the
Bluetooth connection. Thus, the entire process of sending/receiving data to the host is transparent to the end
microprocessor. See Figure 2.
Figure 2. Data & Command Modes
The default configuration for the Bluetooth adapter is:
•
Bluetooth slave mode
•
Bluetooth pin code 1234
•
Serial port 115,200 Kbps baud rate, 8 bits, no parity, 1 stop bit
•
Serial port flow control disabled
•
Low power mode off
You configure the adapter by putting it into command mode and sending ASCII commands over a serial port or the
Bluetooth link. Once you change the configuration parameters, they persist until changed or you perform a factory reset.
There are two ways to configure the Bluetooth module:
•
Local configuration using your computer’s serial port
•
Via Bluetooth
You need a terminal emulator to complete the setup.
NOTE:
Roving Networks suggests using either the TeraTerm (Windows OS) or CoolTerm (Mac OS-X) terminal emulator
program.
UART
Bluetooth Interface
Bluetooth
Module
Command
Mode
$$$
$$$
A
B
User Data
Bluetooth
Host
A
B
