SimTech SimCom SIM800 Series Supplement

SIM800 Series _Bluetooth_
Application Note_V1.02

SmartMachineSmartDecision
SIM800 Series_Bluetooth_Application_V1.02 2 2014-06-30
Document Title SIM800 Series_Bluetooth_Application Note
Version 1.02
Date 2014-06-30
Status Release
Document Control ID SIM800 Series_Bluetooth_Application Note_V1.02
General Notes
Simcom offers this information as a service to its customers, to support application and
engineering efforts that use the products designed by Simcom. The information provided is
based upon requirements specifically provided to Simcom by the customers. Simcom has not
undertaken any independent search for additional relevant information, including any
information that may be in the customer’s possession. Furthermore, system validation of this
product designed by SIMCOM within a larger electronic system remains the responsibility of
the customer or the customer’s system integrator. All specifications supplied herein are
subject to change.
Copyright
This document contains proprietary technical information which is the property of SIMCOM
Limited., copying of this document and giving it to others and the using or communication of
the contents thereof, are forbidden without express authority. Offenders are liable to the
payment of damages. All rights reserved in the event of grant of a patent or the registration of
a utility model or design. All specification supplied herein are subject to change without
notice at any time.
Copyright © SIMCom Wireless Solutions Ltd. 2014

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Content
Version History.............................................................................................................5
1. Bluetooth Function................................................................................................6
1.1. Bluetooth Introduction......................................................................................................6
1.2. Bluetooth Profile...............................................................................................................6
1.3. Bluetooth Device Address.................................................................................................6
1.4. AT Interface for Bluetooth Function.................................................................................6
2. AT Command ........................................................................................................8
2.1. AT+BTHOST Inquiry and set host device name ............................................................8
2.2. AT+BTSTATUS Inquiry current BT device status..........................................................9
2.3. AT+BTPOWER Power on/off BT radio .......................................................................10
2.4. AT+BTPAIR Pair BT device...........................................................................................10
2.5. AT+BTUNPAIR Unpair BT device ..............................................................................12
2.6. AT+BTSCAN Scan surrounding BT device ...................................................................12
2.7. AT+BTCONNECT Connect paired BT device.............................................................13
2.8. AT+BTDISCONN Disconnect BT connection.............................................................13
2.9. AT+BTGETPROF Get profile provided by paired device............................................14
2.10. AT+BTACPT Accept connecting request .....................................................................14
2.11. AT+BTOPPACPT Accept OPP service.........................................................................15
2.12. AT+BTOPPPUSH Push OPP object to paired device...................................................16
2.13. AT+BTSPPGET Get data based on SPP service...........................................................16
2.14. AT+BTSPPSEND Send data based on SPP service......................................................17
2.15. AT+BTATA Answer incoming call..............................................................................18
2.16. AT+BTATDL Redial last number .................................................................................18
2.17. AT+BTATH Hung up voice call....................................................................................19
2.18. AT+BTVGS Configure voice volume...........................................................................19
2.19. AT+BTVGM Configure MIC gain level.......................................................................19
2.20. AT+BTATD Dial voice call...........................................................................................20
2.21. AT+BTRSSI Get RSSI of connected BT device...........................................................20
2.22. AT+BTVTS Send DTMF tone......................................................................................21
2.23. AT+BTCIND Get status of smartphone........................................................................21
2.24. AT+BTCLCC Get call’s status of smartphone..............................................................22
2.25. AT+BTPBSYNC Sync phonebook from remote by BT...............................................23
2.26. AT+BTPBF Find name or number from remote by BT................................................25
2.27. AT+BTAVRCOP AVRCP operation .............................................................................27
2.28. AT+BTVIS Set visibility of BT....................................................................................27
2.29. AT+BTSPPCFG SPP configuration..............................................................................28
2.30. AT+BTPAIRCFG Set BT pairing mode........................................................................28
2.31. AT+CPBFEX Find name or number in module phonebook.........................................29
2.32. AT+BTRING Control ring playing transferred from phone.........................................30
3. CME Error Code ................................................................................................31

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4. Examples..............................................................................................................33
4.1. Accept request from other BT device..............................................................................33
4.2. Send pairing request to other BT device.........................................................................33
4.3. Get the profile provided by paired device.......................................................................34
4.4. Connect service...............................................................................................................35
4.5. Accept file from paired device........................................................................................35
4.6. Send file to other paired BT device.................................................................................35
4.7. Create SPP’s link as a client............................................................................................35
4.8. SPP’s link be create as a server.......................................................................................36
4.9. Configurate SPP..............................................................................................................36
4.10. Send data as a SPP’s client..............................................................................................37
4.11. As a SPP’s server worked in AT mode............................................................................37
4.12. As a SPP’s server worked in APP mode..........................................................................38
4.13. Sync phonebook from remote by BT..............................................................................39
4.14. Find name or number from remote by BT ......................................................................39
4.15. Play music and so on byAVRCP ....................................................................................40
4.16. Add phonebook records to ME or SM phonebook from VCARD file............................41
4.17. Set BT pairing mode .......................................................................................................42
5. Differences between bluetooth version and the standard Version..................44
5.1. ATD<str> ........................................................................................................................44
5.2. AT+CPBF........................................................................................................................44
5.3. AT+CMUX......................................................................................................................44
5.4. AT+CNUM......................................................................................................................44
5.5. AT+CMGS ......................................................................................................................45
5.6. AT+CMSS .......................................................................................................................45
5.7. AT+CPMS .......................................................................................................................45
5.8. AT+CHFA .......................................................................................................................45
5.9. TTS function...................................................................................................................45
Appendix.....................................................................................................................46
A. Reference ........................................................................................................................46
B. Profile..............................................................................................................................46
C. Glossary and Abbreviation..............................................................................................47

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Version History
Date Version Description Author
2013-11-07 1.00 Original Ping Zhang
Chapter 1.4,Add “power-saving mode” description
Chapter 2.6, AT+BTSCAN add <rssi> parameter
Chapter 2.13, Modify AT+BTSPPGET parameter
Chapter 2.14, Modify AT+BTSPPSEND parameter
Chapter 2.22, Add AT+BTVTS command
Chapter 2.23, Add AT+BTCIND command
Chapter 2.24, Add AT+BTCLCC command
Chapter 2.25, Add AT+BTPBSYNC command
Chapter 2.26, Add AT+BTPBF command
Chapter 2.27, Add AT+BTAVRCOP command
Chapter 2.28, Add AT+BTVIS command
Chapter 2.29, Add AT+BTSPPCFG command
Chapter 2.30,Add AT+BTPAIRCFG command
Chapter 3, Add Error Code 1051,1056--1058,1060
2014-03-26 1.01
Chapter 4, Add 4.7----4.17
Ping Zhang
Chapter 2.13, Modify AT+BTSPPGET and
<command> description
Chapter 2.31,AddAT+CPBFEX command
Chapter 2.32,Add AT+BTRING command
Chapter 4.12,Modify demo
2014-06-30 1.02
Chapter 5, Add
Ping Zhang
Scope
This document describes how to use the AT command about Bluetooth and some application
note.The document can apply to SIM800, SIM800-WB64, SIM808, SIM800H Series version with
Bluetooth fuction.

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1. Bluetooth Function
1.1. Bluetooth Introduction
Bluetooth is a wireless technology standard for exchanging data over short distances (using
short-wavelength radio transmissions in the ISM band from 2400–2480 MHz) from fixed and
mobile devices, creating prsonal area networks (PANs) with high levels of security.Bluetooth was
standardized as IEEE 802.15.1
1.2. Bluetooth Profile
To use Bluetooth wireless technology, a device has to be able to interpret certain Bluetooth
profiles, which are definitions of possible applications and specify general behaviors that
Bluetooth enabled devices use to communicate with other Bluetooth devices. These profiles
include settings to parametrize and to control the communication from start. Adherence to profiles
saves the time for transmitting the parameters anew before the bi-directional link becomes
effective. There are a wide range of Bluetooth profiles that describe many different types of
applications or use cases for devices.
Besides of all profiles, there have four basic ones, they are GAP/SDAP/SPP/GOEP Profile.
1.3. Bluetooth Device Address
The Bluetooth device address stores the network address of a Bluetooth–enabled device. It is used
to identify a particular device during operations such as connecting to, pairing with, or activating
the device.
A Bluetooth–enabled device address is a unique, 48 bits address containing the following three
fields:
•LAP field: lower part of the address containing 24 bits.
•UAP field: upper part of the address containing 8 bits.
•NAP field: non–significant part of the address containing 16 bits.
The LAP and the UAP represent the significant address part (SAP) of the Bluetooth device
address.
1.4. AT Interface for Bluetooth Function
As module solution, we provide series of AT interface to operate Bluetooth function, including
pairing, bonding, pushing or receiving file.
Also including interface for SPP service, which could communicate between Bluetooth device and
others via serial port.

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When the module as a Bluetooth headset role, we provide a set of AT commands to control the
remote smart phones, such as phone calls, turn on or hang up calls and so on.
By default, the module operates in power-saving mode, which means that the module can be
simultaneously connected to a Bluetooth device. When the module to establish a connection with a
device, other devices can not be scanned into the module, the module can not get Profile, will not
be able to establish new connections and modules. If the customer's application scenario, the
module needs to be multiple Bluetooth devices (currently up to three) connection, you need to use
the AT + BTSPPCFG = 1 command to turn off the power saving mode. It should be noted that the
power saving mode does not affect the module initiative to connect to other Bluetooth devices.

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2. AT Command
Command Description
AT+BTHOST Inquiry and set host device name
AT+BTSTATUS Inquiry current BT device status
AT+BTPOWER Power on or power off BT radio
AT+BTPAIR Pair BT device
AT+BTSCAN Scan surrounding BT device
AT+BTUNPAIR Unpair BT device
AT+BTCONNECT Connect paired BT device
AT+BTDISCONN Disconnect BT device
AT+BTGETPROF Get profile provided by paired device
AT+BTACPT Accept connecting request
AT+BTOPPACPT Accept OPP service
AT+BTOPPPUSH Push OPP object to paired device
AT+BTSPPSEND Send data based on SPP service
AT+BTSPPGET Get data based on SPP service
AT+BTATA Answer incoming call
AT+BTATDL Redial last number
AT+BTATH Hung up voice call
AT+BTVGS Configure voice volume
AT+BTVGM Configure MIC volume
AT+BTATD Dial up a voice call
AT+BTRSSI Get RSSI of connected device
AT+BTVTS Send DTMF tone
AT+BTCIND Get status of smartphone
AT+BTCLCC Get call’s status of smartphone
AT+BTPBSYNC Sync phonebook from remote by BT
AT+BTPBF Find name or number from remote by BT
AT+BTAVRCOP AVRCP Operation
AT+BTVIS Set visibility of BT
AT+BTSPPCFG SPP’s config
AT+BTPAIRCFG Set BT pairing mode
AT+CPBFEX Find name or number in module phonebook
AT+BTRING Control ring playing transferered from phone
2.1. AT+BTHOST Inquiry and set host device name
AT+BTHOST Inquiry and set host device name

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Response
+BTHOST: (1-18)
OK
Test command
AT+BTHOST=?
Parameters
See Write Command
Response
+BTHOST: <name>, <address>
OK
Read command
AT+BTHOST?
Parameters
See Write Command
Response
OK
Write command
AT+BTHOST=<
name> Parameters
<name> device name
<address> device address
Note Max length of <name> is 18 bytes,and display in UTF-8 code.
2.2. AT+BTSTATUS Inquiry current BT device status
AT+BTSTATUS Inquiry current BT device status
Response
OK
Test Command
AT+BTSTATUS=
? Parameters
See Read Command
Response
If unpaired before:
+BTSTATUS: <status>
If paired before but unconnected:
+BTSTATUS: <status>
P: <paired id>, <name> <address>
If paired and connected:
+BTSTATUS: <status>
P: <paired id>, <name> <address>
C: <connected id>,<name>,<address>,<profile name>
OK
Read Command
AT+BTSTATUS?
Parameters
<status> 0 Initial
1 Disactivating
2 Activating
5 Idle

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6 Scanning
7 Inquiry_Res_Ind
8 stopping scanning
9 Bonding
12 Connecting
13 Unpairing
14 Deleting paired device
15 Deleting all paired device
16 Disconnecting
19 Pairing confirm while passive pairing
20 Waiting for remote confirm while passive pairing
25 Accepting connection
26 SDC Refreshing
29 Setting host name
30 Releasing all connection
31 Releasing connection
36 Activating service
<paired id> paired device ID
<connected id> connected device ID
<name> devicename
<address> device address
<profile name> profile
Note Max length of <name> is 18 bytes, 18 bytes in UTF-8 code
2.3. AT+BTPOWER Power on/off BT radio
AT+BTPOWER Power on/off BT radio
Response
+BTPOWER: (list of supported <n>s)
OK
Test Command
AT+BTPOWER
=?
Parameters
See Write Command
Response
OK
Write Command
AT+BTPOWER
=<n> parameter
<n> 0power off BT radio
1 power on BT radio
Note After power off BT radio, should wait 25s at least to re-power on BT
radio.
2.4. AT+BTPAIR Pair BT device
AT+BTPAIR Pair BT device

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Response
+BTPAIR: 0,(list of supported <device ID>s)
+BTPAIR: 1,(list of supported <confirm>s)
+BTPAIR: 2,(length of supported <passkey>s)
OK
Test Command
AT+BTPAIR=?
Parameters
See Write Command
Response
OK
If digital key exchanged
+BTPAIRING: <name>,<address>,<passcode>
If passkey exchanged:
+BTPAIRING: <name>,<address>
If passive mode with succees:
+BTPAIR: <id>,<name>,<address>
If passive mode with failure:
+BTPAIR: 0
Parameters
<device ID> BT device ID
<confirm> 1 accept
0 reject
<passkey> passkey, length is（4-16）
<id> 0pairedfailed
>=1paireddeivceID
<name> BT device name
<address> BT device address
<passcode> Digital password
Write Command
1) active
AT+BTPAIR=0,
<device ID>
2) passive with
digital key request
AT+BTPAIR=1,
<confirm>
3) passive with
passkey request
AT+BTPAIR=2,
<passkey>
URC
If there is incoming request:
+BTPAIRING: <name>,<address>,<passcode>
or
+BTPAIRING: <name>,<address>
Parameters
<name> device name
<address> device address
<passcode> digital password
Note 1. Max length of <name> is 18 bytes, 18 bytes in UTF-8 code
2. Pairing timeout is around 15s each side

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2.5. AT+BTUNPAIR Unpair BT device
AT+BTUNPAIR Unpair BT device
Response
+BTUNPAIR: (list of supported <device ID>s)
OK
Test Command
AT+BTUNPAIR
=?
Parameter
See Write Command
Response
OK
Write Command
AT+BTUNPAIR
=<device ID>
Parameter
<device ID> Paired Device ID.
0 delete all the paired device
1 delete the the paired device corresponding to ID
2.6. AT+BTSCAN Scan surrounding BT device
AT+BTSCAN Scan surrounding BT device
Response
+BTSCAN: (list of supported <switch>s), (list of supported <Timer>s)
OK
Test Command
AT+BTSCAN=?
Parameters
See Write Command
Response
OK
If BT device scanned:
+BTSCAN: <status>,<device ID>,<name>,<address>,<rssi>
If terminate:
+BTSCAN: <status>
Wrtie Command
AT+BTSCAN=<
switch>[,<Timer
>]
Parameters
<switch> 1 start
0 stop
<status> 0 BT device found
1 scanning finished
2 scanning stop
3 scanning failed
<Timer> scanning time 10-60s
<device ID> BT device ID scanned
<name> BT device name
<address> BT device address

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<rssi> -127…0 RSSI value of BT device
Note 1．Max length of <name> is 18 bytes, 18 bytes in UTF-8 code
2．If <timer> ommited, the default value is 30s
2.7. AT+BTCONNECT Connect paired BT device
AT+BTCONNECT Connect paired BT device
Response
+BTCONNECT: (list of supported <device ID>s), (list of supported
<profile ID>s)
OK
Test Command
AT+BTCONNE
CT=?
Parameters
See Write Command
Response
OK
If OK:
+BTCONNECT: <id>,<name>,<address>,<profile name>
If failed:
+BTCONNECT: 0
Write Command
AT+BTCONNE
CT=<device
ID>,<profile ID>
Parameters
<device ID> ID of paired BT device
< profile ID> BT profile ID
<id> ID of connected BT device
<name> BT device name
<address> BT device adress
<profile name> BT device service name
Note 1. Max length of <name> is 18 bytes, 18 bytes in UTF-8 code
2. Connection timeout is around 20s
3. if incoming request, there will be URC
+BTCONNECING: <address>,<profile name>
2.8. AT+BTDISCONN Disconnect BT connection
AT+BTDISCONN Disconnect BT connection
Response
+BTDISCONN: (list of supported <device ID>s)
OK
Test Command
AT+BTDISCON
N=?
Parameters
See Write Command
Write Command
AT+BTDISCON
N=<device ID>
Response
OK

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+BTDISCONN: <name>,<address>,<profile name>
Parameters
<device ID> connected device ID
<name> device name
<address> devie address
<profile name> profile service
Note 1．Max length of <name> is 18 bytes, 18 bytes in UTF-8 code
2．If disconnected by remote, there still be URC: +BTDISCONN
2.9. AT+BTGETPROF Get profile provided by paired device
AT+BTGETPROF Get profile provided by paired device
Response
+BTGETPROF: (list of supported <device ID>s)
OK
Test Command
AT+BTGETPRO
F=?
Parameters
See Write Command
Response
OK
+BTGETPROF: <profile ID>,<profile name>
Write Command
AT+BTGETPRO
F=<device ID>
Parameters
<device ID> Paired Device ID
<profile ID> profile ID
<profile name> profile name
2.10. AT+BTACPT Accept connecting request
AT+BTACPT Accept connecting request
Response
+BTACPT: (list of supported <confirm>s)
OK
Test Command
AT+BTACPT=?
Response
OK
If connected successfully, then will report:
+BTCONNECT: <id>,<name>,<address>,<profile name>
If connecting failed:
+ BTDISCONN: <name>,<address>,<profile name>
Write Command
AT+BTACPT=<
confirm>
Parameters

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<confirm> 1 accept
0 reject
<id> >0 connected device ID
<name> device name
<address> device address
<profile name> profile name
URC
If incoming connecting request:
+BTCONNECTING: <address>, <profile name>
Parameters
<address> device address
<profile name> profile name
Note Max length of <name> is 18 bytes, 18 bytes in UTF-8 code
2.11. AT+BTOPPACPT Accept OPP service
AT+BTOPPACPT Accept OPP service
Response
+BTOPPACPT: (list of supported <confirm>s),(list of supported<drv>)
OK
Test Command
AT+BTOPPACP
T=?
Response
OK
+BTOPPPUSH: <status>
Parameters
<confirm> 1 Accept
0 Reject
<drv> 0 internal flash memory
1externalmemorycard
<status> 0 failed
1 successful
Write Command
AT+BTOPPACP
T=<confirm>[,<d
rv>]
URC:
If there has an incoming opp file, there will be a URC report.
+BTOPPPUSHING: <name>, <file name>
Parameters
<name> device name
<file name> file name
Note 1. Max length of <name> is 18 bytes, 18 bytes in UTF-8 code

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2．File is stored in path: C:\User\BtReceived\ for internal memory card,
D:\BtReceived\ for external memory card. At the first time to use SD
card, customer must execute “AT+SD2PCM=0” and “AT&W”, then
reboot the module.
2.12. AT+BTOPPPUSH Push OPPobject to paired device
AT+BTOPPPUSH Push OPP object to paired device
Response
+BTOPPPUSH: (list of supported <device ID>s), (length of supported
<string>s)
OK
Test Command
AT+BTOPPPUS
H=?
Parameters
See Write Command
Response
OK
+BTOPPPUSH: <para>
Write Command
AT+BTOPPPUS
H=<device ID
>,<string>
Parameters
<device ID> Paired Device ID
<string> file name include complete path, lenght（4-259）
<para> 0 Sendfailed
1 Send successfully
2 Server issue
Note
2.13. AT+BTSPPGET Get data based on SPP service
AT+BTSPPGET Get data based on SPP service
Response
+BTSPPGET: (list of supported <command>s), (list of supported
<connectId>), (list of supported <reqLength>s), (list of supported
<showWithHex>s)
OK
Test Command
AT+BTSPPGET
=?
Parameters
See Write Command
Response
+BTSPPGET: <command>
OK
Read Command
AT+BTSPPGET
?
Parameters
See Write Command

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Response
OK
or
ERROR
If command value is 2,return:
+BTSPPGET: <connectId>,<cnfLen1>
OK
If command value is 3,return:
+BTSPPGET: <connectId>,<cnfLen1>[,<data string>]
OK
Write Command
1).If
AT+BTSPPCFG=
”MC”,2 response
1(Enable
multi-connect)
AT+BTSPPGET
=<command>[,<
connectId>][,
<reqLength>][,<s
howWithHex>]
2).If
AT+BTSPPCFG=
”MC”,2 response
0(Disable
multi-connect)
AT+BTSPPGET
=<command>[,
<reqLength>][,<s
howWithHex>]
Parameters
<command> 0 Auto mode. Data will be output in decimal system.
1 Manual mode. There will be an indication when first
package arrives.
2 Inquiry data length in manual mode.If multi-connect
enabled,this command need parameter <connectId>.
3 Getting data in manual mode. If multi-connect
enabled,this command need parameter <connectId>.You can input
params of <reqLength> and <showWithHex> when you need.
<reqLength> 1-1024 , the length of data requested, only valid in manual
mode
<showWithHex> 1, displayed in hex, only valid in manual mode
<connectId> connection`s ID
<cnfLen1> 0-1024, character length
<data string> string printed
Note URC
When the module receives data by SPP,there will be URC report:
1. Auto mode
+BTSPPDATA: <connectId>,<cnfLen2>,<data string>
2. Manual mode
+BTSPPMAN: <connectId>
Parameter
<cnfLen2> 1-1024, length of printed character
2.14. AT+BTSPPSEND Send data based on SPPservice
AT+BTSPPSEND Send data based on SPP service
Write Command
1).If
Response
>

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If successful,
SEND OK
If failed,
SEND FAIL
Or if this connectId is not allowed to send data,
ERROR
AT+BTSPPCFG=
”MC”,2 response
1(Enable
multi-connect)
AT+BTSPPSEN
D=<connectId>,<
length>
2).If
AT+BTSPPCFG=
”MC”,2 response
0(Disable
multi-connect)
AT+BTSPPSEN
D=<length>
Parameters
<connectId>connection`s ID.If disable multi-connection,
this param is no need.
<length> 1-1024, the length of data will be sent.
When the length of inputing data is up to <length> specified, the package
will be sent out automatically. Press ESC key will quit the process.
Response
>
If successful,
SEND OK
Or failed,
SEND FAIL
Or if this connectId is not allowed to send data,
ERROR
Execute
Command
AT+BTSPPSEN
D
1.If multi-connection function is enabled, this command will be disabled.
2.In this mode, <Ctrl+z> will send the package immediately, and ESC
will quit the process.
2.15. AT+BTATA Answer incoming call
AT+BTATA Answer incoming call
Response
OK
Execute Command
AT+BTATA
URC
If there is incoming Call on remote phone, will report below:
BTRING
Note When module connected with smartphone as an earphone,if here comes
incoming call,the call would be answered through this command
2.16. AT+BTATDL Redial last number
AT+BTATDL Redial last number
Execute Command
AT+BTATDL
Response
OK
Note When module connected with smartphone as an earphone,would redial
last number through this command

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2.17. AT+BTATH Hung up voice call
AT+BTATH Hung up voice call
Execute Command
AT+BTATH
Response
OK
Note When module connected with smartphone as an earphone, the incoming
call would be hung up through this command
2.18. AT+BTVGS Configure voice volume
AT+BTVGS Configure voice volume
Response
+BTVGS: (<gain> range)
OK
Test Command
AT+BTVGS=?
Module is Earphone mode
Response
+BTVGS: <gain>
OK
Read Commnad
AT+BTVGS?
Response
OK
Write Command
AT+BTVGS=<ga
in> Parameter
<gain> volume
This command is used configure call volume when the module is
connected with smartphone as an earphone
Note For some smartphone,after connected with BT earphone,the current call
volume may not be transmitted to earphone,thus the return value of the
read command may be 0.But after setting once,the value would be correct.
2.19. AT+BTVGM Configure MIC gain level
AT+BTVGM Configure MIC gain level
Response
+BTVGM: (<gain> range)
OK
Test Command
AT+BTVGM=?
Read Command
AT+BTVGM?
Response
+BTVGM: <gain>
OK

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Response
OK
Write Command
AT+BTVGM=<g
ain> Parameter
<gain> MIC gain level
This command is used set MIC volume when the module is connected
with smartphone as an earphone
Note For some smartphone,after connected with BT earphone,the current MIC
volume may not be transmitted to earphone,thus the return value of the
read command may be 0.But after setting once,the value would be correct.
2.20. AT+BTATD Dial voice call
AT+BTATD Dial voice call
Response
+BTATD: (<number> length range)
OK
Test Command
AT+BTATD=?
Response
OK
Write Command
AT+BTATD=<nu
mber> Parameter
<number> phone number
Module as earphone connected to smartphone, this command could make
an outgoing call
Note
2.21. AT+BTRSSI Get RSSI of connected BT device
AT+BTRSSI Get RSSI of connected BT device
Response
+BTRSSI: (list of supported <device ID>s)
OK
Test Command
AT+BTRSSI=?
Response
+BTRSSI: <rssi>
OK
Write Command
AT+BTRSSI=<d
evice ID>
Parameters
<device ID> Connected Device ID
<rssi> -127…0 RSSI value of BT device
Note RSSI value is negative, the smaller value represents the worse signal