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Chapter 2 – AT Commands
Multi-Tech Systems, Inc. SocketWireless Bluetooth AT Commands (S000360H) 43
Notes:
• The RSSI value will be +00 if the signal is within the Golden Range.
• The Golden Range min and max value is 1 and 12 respectively for the modules.
• This value is the difference between the measured Received Signal Strength Indication
(RSSI) and the limits of the Golden Receive Power Range (see below for definition). Any
positive RSSI value returned by the Host side indicates how many dB the RSSI is above
the upper limit. Any negative value indicates how many dB the RSSI is below the lower
limit. A value of zero indicates that the RSSI is inside the Golden Receive Power Range.
• How accurate the dB values will be depends on the Bluetooth hardware. The only
requirements for the hardware are that the Bluetooth device is able to tell whether the
RSSI is inside, above, or below the Golden Device Power Range.
RSSIC Get RSSI Value by Channel
This command gets the RSSI Value by channel number.
Format: ATRSSIC,<Channel Number>
Parameters: Channel Number: 0, 1, 2, 3
Return Parameters: <RSSI Value>
RSSI Value is in hex, typically from -10 to +31 in integer dB value.
EXAMPLE: TYPE: ATRSSIC,1
REPLY: <cr_lf>OK<cr_lf>
<cr_lf>+00<cr_lf>
OR
<cr_lf>ERROR<cr_lf>
LQ Get Link Quality
This command gets the link quality of the current connection.
Format: ATLQ
Return Parameters: <Link Quality>
Hex value from 0 to 255 decimal, the measure of Bit Error Rate (BER)
EXAMPLE:
TYPE: ATLQ<cr>
REPLY: <cr_lf>OK<cr_lf>
<cr_lf>FF<cr_lf>
OR
<cr_lf>ERROR<cr_lf>
Note: Link Quality is a Hex value from 0-255, which represents the quality of the link between
two Bluetooth devices. The higher the value, the better the link quality is. Each
Bluetooth module vendor will determine how to measure the link quality. In the case for
CSR, this value is a measure of BER.
LQC Get Link Quality by Channel
This command gets the Link Quality by channel number.
Format: ATLQC,<Channel Number>
Parameters: Channel Number: 0, 1, 2, 3
Return Parameters: <RSSI Value>
Hex value from 0 to 255 decimal, the measure of Bit Error Rate (BER)
EXAMPLE:
TYPE: ATLQ,1<cr>
REPLY: <cr_lf>OK<cr_lf>
<cr_lf>FF<cr_lf>
OR
<cr_lf>ERROR<cr_lf>
- 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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