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Chapter 4 – Examples
Multi-Tech Systems, Inc. SocketWireless Bluetooth AT Commands (S000360H) 64
Multi-Point Example Using MTS2BTSMI or MTS2BTA
Four Master and One Slave Devices
Note: Attaching the fourth master device can overload the connections and cause all connections to be
terminated. Increasing the distance between Bluetooth devices will effect performance and could further limit
the number of connections.
Setup hardware for this example consisting of up to five MTS2BTSMI or MTS2BTA Bluetooth units connected
through serial ports to workstations. One unit is configured as slave and four units are configured as masters.
The slave needs to be firmware version 3.6.2.1.0.0 or newer to support multipoint connections. The masters
are not firmware dependent and can be older models. All Bluetooth units are configured with baud rate of
9600bps, 8 data bits, no parity, 1 stop bit and hardware flow control. Baud rate can be set up to 115.2kbps
but all Bluetooth devices need to be set to same baud rate.
Each workstation uses a terminal emulator like HyperTerminal or ZOC to communicate to Bluetooth device
using AT commands.
Configure the slave Bluetooth device to function as slave in data mode.
- Verify local device is Slave in Data Mode.
Sent: ATSI,7 <cr>
Reply: OK<cr_lf>
Reply: <cr_lf>0,1,0,0 <cr_lf>
- If not Slave, set to Slave in Data Mode and reset unit.
Sent: ATSW25,0,1,0,0 <cr>
Reply: OK<cr_lf>
- Enable multipoint mode and set number of connections to four. Then reset unit.
Sent: ATSSW,3,4 <cr>
Reply: OK<cr_lf>
Sent: ATURST <cr>
Reply: OK<cr_lf>
- Retrieve Bluetooth address from Bluetooth slave device in this test setup.
Sent: ATSI,1<cr>
Reply: OK<cr_lf>
Reply: <cr_lf>12-digit address <cr_lf>OK<cr_lf>
Issue these AT commands at the master Bluetooth devices to generate four wireless connections between
the four Masters and the slave device.
- Verify local device is Master in Data Mode.
Sent: ATSI,7 <cr>
Reply: OK<cr_lf>
Reply: <cr_lf>1,1,0,0 <cr_lf>
- If not Master, set to Master in Data Mode and reset unit.
Sent: ATSW25,1,1,0,0 <cr>
Reply: OK<cr_lf>
Sent: ATURST <cr>
Reply: OK<cr_lf>
- Perform an Inquiry to detect BT_Address of slave (unless it is already known).
Sent: ATDI,1,00000000 {Class of Device} <cr> // Looks for one Bluetooth device
Reply: OK<cr_lf> // Search completed when DONE appears
Reply: <cr_lf>BT_Slave1_Address,00000000,SOCKETWIRELESS<cr_lf>
Reply: <cr_lf>DONE<cr_lf>
- Perform a Master Connection over SPP to the Bluetooth slave device.
Sent: ATDM, BT_Slave1_Address,1101<cr> // SPP connection
Reply: OK<cr_lf>
Reply: <cr_lf>CONNECT,BT_Slave1_Address <cr_lf> // Returns Slave BT address radio is in
data mode
- AT Commands 1
- Reference Guide 1
- Table of Contents 3
- Chapter 1 – Introduction 5
- Changing Configuration 6
- Using Multi-Point Mode 8
- Multipoint Examples 9
- Multi-Point Test Scenarios 10
- Repeater Mode 12
- Chapter 2 - AT Commands 13
- URST Reset 14
- FRST Factory Reset 14
- SI Status Information 15
- Security Commands 19
- Set and Read Device Name 20
- RSN Read Service Name 21
- SP Set PIN 22
- OP Overwrite PIN 23
- Configuration Commands 24
- SW22 Write PIO Direction 26
- SW23 Write PIO Level 27
- SW26 Lock User Settings 29
- SW27 Write LED Rate 29
- SW29 Write PIN Lock Mode 30
- SW30 Write Deep Sleep Mode 30
- Inquiry Commands 31
- Connect as Master Commands 32
- DC Dial Channel 33
- DL Dial Last 34
- LAST Read Last Address 34
- MACLR Master Address Clear 35
- Connect As Slave Command 36
- Disconnect Commands 36
- About Command/Data Mode 37
- Data Mode Commands 37
- Utilities – Cancel Command 38
- Pairing Commands 39
- Low Power Modes Using Sniff 40
- SNIFF Enable Sniff 40
- SSNIFF Enable Auto Sniff 41
- CSNIFF Clear Sniff 41
- XSNIFF Exit Sniff Mode 41
- PARK Enable Park 42
- XPARK Exit Park 42
- Golden Receive Power Range 42
- RSSI Get RSSI Value 42
- LQ Get Link Quality 43
- Max Power Command 44
- Variable Storage Commands 45
- PIO Logic Commands 46
- Commands 47
- FTP Client 48
- DHFTP Dial Hang Up FTP 49
- FTPB FTP Browse 49
- FTP Push/Pull Commands 51
- FTP Server 52
- DOPP Dial OPP 53
- DHOPP Dial Hang Up OPP 53
- OPP Push/Pull Commands 54
- Chapter 4 – Examples 59
- From Power Up 60
- Headset Point-to-Point 60
- Headset Multipoint 60
- Example Client Applications 61
- Description Requires 69
- Appendix B – Responses 72
- Appendix C -- UUID Table 79
- Consumption 80
- Command Responses Comparison 81
- Abbreviations 85
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