Chapter 3 – AT Commands, S-Registers, and Result Codes
Multi-Tech Systems, Inc. Serial-to-Bluetooth Adapter User Guide (S000370A) 13
Test Procedures Using AT Commands

The following tesing procedures can be used with the MTS2BTA and the MTS2BTSMI.
1. Connect serial cable from computer to DB9 connector of each MTS2BTA, then attach antenna and power.
Do this for both master and slave Bluetooth adapters.
2. Use terminal emulator like Hyperterminal or ZOC to communicate to Bluetooth socket modem using AT
command set. Set baud rate to 9600bps. If MTS2BTA has label with different baud rate then set emulator
to match with this baud rate.
3. If necessary, can retrieve address from Bluetooth module being tested.
Sent: ATSI,1<cr_lf>
Reply: OK<cr_lf>
Reply: <cr_lf>12-digit address <cr_lf>OK<cr_lf>
4. Issue these AT commands at slave Bluetooth device to prepare for wireless connection and transfer data
between modules.
• How to set to Slave, Fast Data Mode and DUN.
Sent : ATSW25,0,0,0,1 <cr_lf>
Reply: OK<cr_lf>
• Or how to set to Slave, Fast Data Mode and SPP.
Sent : ATSW25,0,0,0,0 <cr_lf>
Reply: OK<cr_lf>
• Reset slave Bluetooth device.
Sent : ATURST <cr_lf> // Resets radio, wait 5 seconds
Reply: OK<cr_lf>
5. Issue these AT commands at master Bluetooth device to generate a wireless connection and transfer data
between modules.
• How to set to Master, Fast Data Mode and DUN.
Sent : ATSW25,1,0,0,1 <cr_lf>
Reply: OK<cr_lf>
• Or how to set to Master, Fast Data Mode and SPP.
Sent : ATSW25,1,0,0,0 <cr_lf>
Reply: OK<cr_lf>
• Perform an Inquiry to detect BT_Address (unless it is already known) of slave Bluetooth device.
Sent : ATURST <cr_lf> // Resets radio, wait 5 seconds
Reply: OK<cr_lf>
Sent : ATDI,1,00000000 {Class of Device} <cr_lf> // Looks for only one Bluetooth device
Reply: OK<cr_lf> // Search completed when DONE appears
Reply: <cr_lf>00A0961F2023,00000104,SOCKETWIRELESS<cr_lf>
Reply: <cr_lf>DONE<cr_lf>
• Perform a Master Connect over SPP using the BT_Address.
Sent : ATDM, 00A0961F2023,1101<cr_lf> // SPP connection
Reply: OK<cr_lf>
Reply:<cr_lf>CONNECT,00A0961F008F <cr_lf> // Returns Slave BT address radios is in data
mode
• Or perform a Master Connect over DUN using the BT_Address.
Sent : ATDM, 00A0961F2023,1103<cr_lf> // DUN connection
Reply: OK<cr_lf>
Reply:<cr_lf>CONNECT,00A0961F008F <cr_lf> // Returns Slave BT address radios is in
data mode
• Send and receive Data by transferring file or holding down key on keyboard.