
Rev: 13 September 2005 
Class 2 Bluetooth module - F2M03C2 
Datasheet
5.1.3 
Settings 
The default settings allow the user to communicate via Bluetooth, without sending any configuration 
commands, as soon as a successful connection has been established. Information sent and received on 
the serial interface of the WU unit at 38400 bps is transmitted transparently between the two connected 
devices. The default settings are valid as long as the user has made no configuration. 
When there is no Bluetooth connection established it is possible to configure the WU firmware via 
commands sent on the serial interface. All settings changed by the user are stored in persistent memory. 
The following serial settings are used for configuration mode and are not configurable: 
Parameter 
Default Value 
Baud rate 
38400 
Data bits 
8 
Parity 
None 
Stop bits 
1 
Hardware flow control 
On 
To be able to send commands to the Wireless UART firmware, it must be set in 
Host Controlled Mode
(HCM). As previously described the Wireless UART firmware can only enter HCM when no Bluetooth 
connection is established. 
Once entered HCM there are several commands that can be issued: 
 
Configuration commands 
 
Software / Hardware reboot 
 
Inquiry (search for Bluetooth devices in the neighborhood) 
 
Pairing (device security - authentication and encryption) 
 
Advanced configuration commands 
 
SCO commands 
 
Information commands 
 
Control commands 
Configuration Commands 
There are several settings stored in the Wireless UART firmware that can be read and modified by using 
the configuration commands. 
Examples of these settings are: 
 
Local Bluetooth name 
 
Local SDP-service name 
 
Operating mode 
 
Serial port settings 
 
Bluetooth security settings (authentication, encryption) 
There are two normal operating modes: 
 
Connecting mode – Bluetooth master 
 
Endpoint mode – Bluetooth slave 
In Connecting mode the Wireless UART firmware will continuously try to establish a Bluetooth connection to 
a specified remote Bluetooth device in the neighborhood (Bluetooth master). 
In Endpoint mode the Wireless UART firmware may accept connections from remote Bluetooth devices. A 
connection request will be accepted when the specified rules are fulfilled (Bluetooth slave). 
 2003 Free2move AB
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