Specifications

Chapter 12 – SocketWireless Bluetooth (MTS2BTSMI)
Multi-Tech Systems, Inc. Universal Socket Hardware Guide for Developers (S000342F) 153
Example of a Slave Command Sequence
From Power Up:
1. Check and verify Communication to Slave.
Sent : AT<cr_lf>
Reply: <cr_lf>OK<cr_lf>
2. Get information on Slave Bluetooth address.
Sent : ATSi,1<cr_lf>
Reply: 12-digit address
<cr_lf>OK<cr_lf>
3. Set Slave to automatically connect in Fast Data Mode on Bluetooth connection.
Sent : ATSW25,0,0,0,0 <cr_lf>
Reply: <cr_lf>OK<cr_lf>
4. Either cycle power or send ATURST.
Note: This command sequence assumes the radio is in factory default in which it automatically comes up and
is connectable as a Slave from a Master request.
Disabling Flow Control Using AT Commands
Using a terminal screen with flow control enabled, issue commands to turn off flow control.
Sent : ATSW22,3,1,0 <cr_lf> // Set PIO3 as output and do not store in flash
Reply: OK<cr_lf>
Sent : ATSW23,3,1,0<cr_lf> // Set PIO3 output high and do not store in flash
Reply: OK<cr_lf>
To store the setting in flash:
Sent : ATSW22,3,1,1 <cr_lf> // Set PIO3 as output and store in flash
Reply: OK<cr_lf>
Sent : ATSW23,3,1,1<cr_lf> // Set PIO3 output high and store in flash
Reply: OK<cr_lf>
Now you can communicate with the Bluetooth device with flow control turned off.
Changing Configuration
Parameters, such as the Bluetooth Name, Service Name, Class of Device, and Serial Port settings can be
viewed and configured. This can be done locally through the serial port UART or from a remote Bluetooth
RF link. To configure the SocketWireless Bluetooth device, the device must be in command mode by issuing
ATMC.
You can use the developer board and the RS-232 cable to connect to a PC and pass ASCII characters
through the terminal to the SocketWireless Bluetooth device. The communications settings should match the
settings used when the SocketWireless Bluetooth device connects. For example, the defaults are:
9600bps
8 bits
No Parity
1 stop bit
Hardware flow control enabled.
Once you change these parameters, you have the option to store them permanently in the non-volatile
memory. Run your favorite terminal emulator, HyperTerminal, or other program.
• Type AT on your screen and follow it with a carriage return <cr_lf>. You should see "OK" returned
to you. This will verify that your cable and communications settings are correct. When the
SocketWireless device is not connected to another Bluetooth device, you can type the AT
commands directly into the SocketWireless' UART; e.g., you do not have to type ATMC to change
from data mode to command mode.
• Now you can enter any of the AT commands discussed in the following sections. Follow these
commands by <cr_lf>. Valid commands will return an "OK" or a valid response. Invalid commands
will reply ERROR.
• To return to data mode, type ATMD. You can now pass or receive data from a remote connected
Bluetooth device.
Notes:
• If you change communications parameter settings, remember to change your terminal or emulator
communications settings to correspond to the newly created parameter settings.
• AT commands will not echo back to the terminal.