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Chapter 1 – Introduction
Multi-Tech Systems, Inc. SocketWireless Bluetooth AT Commands (S000360H) 5
Chapter 1 – Introduction
Overview
This document describes the protocol used to control and configure the Multi-Tech Systems, Inc.
SocketWireless Bluetooth device. The protocol is similar to the industry standard Hayes AT protocol used in
telephone modems due to the fact that both types of devices are connection oriented. Appropriate AT
commands have been provided to make the module perform the two core actions of a Bluetooth device,
which are make/break connections and inquiry. Additional AT commands are also provided to perform
ancillary functions.
Just like telephone modems, the serial module powers up into an unconnected state and will respond to
inquiry and connection requests. Then, just like controlling a modem, the host or client can issue AT
commands, which map to various Bluetooth activities. The command set is extensive enough to allow a host
to make connections that are authenticated, encrypted, or not encrypted. The SocketWireless Bluetooth
device can be configured, commanded, and controlled through the local serial port or over the Bluetooth RF
connection.
Important Notes:
• To provide the best firmware architecture, design, and future profile support, the code is not
100% backward compatible with regard to certain AT commands and responses.
• The CSR (Cambridge Silicon Radio) BC04 chipset in this module is memory-resource limited;
therefore, it is recommended that you do NOT fully implement the AT protocol similar to an AT
modem.
Bluetooth Protocol V2.0
For Bluetooth protocol V2.0, the circuit board I/O pin 7 now controls flow control. In V1.2, circuit board I/O
pin 3 controlled flow control.
Protocol Change Example:
Previous Protocol V1.2 Changed to New Protocol V2.0
ATSW22,3,x,x changed to ATSW22,7,x,x
ATSW23,3,x,x changed to ATSW23,7,x,x
Comparison of Bluetooth Commands
See Appendix E for a comparison of the responses for Bluetooth AT Commands, Version 3.6.2.1.0.0 with
Version 2.8.1.1.0.0.
- 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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