Quectel GSM/GPRS Module Series Installation instructions

GSM QuecCell
AT Commands Manual
GSM/GPRS Module Series
Rev. GSM_QuecCell_AT_Commands_Manual_V1.1
Date: 2015-04-08
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About the Document
History
Revision
Date
Author
Description
1.0
2012-09-28
Bob DENG
Initial
1.1
2015-04-08
Bob DENG
Added applicable modules
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Contents
About the Document...................................................................................................................................2
Contents.......................................................................................................................................................3
Table Index...................................................................................................................................................4
1Introduction..........................................................................................................................................5
2AT Commands for GSM QuecCell......................................................................................................6
2.1. Overview of AT Commands for GSM QuecCell..........................................................................6
2.1.1. AT+QOPS Scan Basic Station Information...................................................................6
2.1.2. AT+QENG Switch on or off Engineering Mode.............................................................7
2.1.3. AT+QLOCKF Lock the Base Station...........................................................................10
2.1.4. AT+QCHINFO Get Channel Information.....................................................................10
2.1.5. AT+QLASTTA Get TA Value ........................................................................................12
2.1.6. AT+QFORBIDMNC Forbid Operator...........................................................................12
2.1.7. AT+QSCANF Scan ARFCN Receiving Level..............................................................13
3Example ..............................................................................................................................................15
3.1. AT+QOPS .................................................................................................................................15
3.2. AT+QENG.................................................................................................................................16
3.3. AT+QLOCKF.............................................................................................................................17
3.4. AT+QCHINFO...........................................................................................................................18
3.5. AT+QLASTTA............................................................................................................................19
3.6. AT+QFORBIDMNC...................................................................................................................20
3.7. AT+QSCANF.............................................................................................................................20
4Appendix A Reference.......................................................................................................................26
5Appendix B Summary of <err> Code...............................................................................................27
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Table Index
TABLE 1: OVERVIEW OF AT COMMANDS FOR GSM QUECCELL................................................................. 6
TABLE 2: RELATED DOCUMENTS.................................................................................................................. 26
TABLE 3: TERMS AND ABBREVIATIONS........................................................................................................ 26
TABLE 4: DIFFERENT CODING SCHEMES OF +CME ERROR: <ERR>....................................................... 27
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1Introduction
QuecCell function is a feature embedded in Quectel modules that can scan the detailed information about
the base station, lock the specified GSM frequency, and forbid the specified operator. With this feature,
the customer can choose the network they expect in the certain place.
This document is applicable to all Quectel GSM modules.
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2AT Commands for GSM QuecCell
2.1. Overview of AT Commands for GSM QuecCell
Table 1: Overview of AT Commands for GSM QuecCell
2.1.1. AT+QOPS Scan Basic Station Information
The command can scan all the GSM frequencies. After that, the operator with the best network coverage
can be chosen through the results of QuecCellScan.
Command
Description
AT+QOPS
Scan Basic Station Information
AT+QENG
Switch on or off engineering mode
AT+QLOCKF
Lock the Base Station
AT+QSCANF
Scan ARFCN receiving Level
AT+QCHINFO
Get channel information
AT+QLASTTA
Get last valid TA value
AT+QFORBIDMNC
Forbid operator
AT+QOPS Scan Basic Station Information
Read Command
AT+QOPS?
Response
+QOPS:<stat>,<Oper in string>,<Oper in short
string>,<Oper in number><CR LF>
<index1>,<lac>,<ci>,<bsic>,<rxlev>,<arfcn> <CR LF>
<index2>,<lac>,<ci>,<bsic>,<rxlev>,<arfcn><CR LF>
…
<indexN>,<lac>,<ci>,<bsic>,<rxlev>,<arfcn><CR LF>
+QOPS:<stat>,<Oper in string>,<Oper in short
string>,<Oper in number><CR LF>
<index1>,<lac>,<ci>,<bsic>,<rxlev>,<arfcn><CR LF>
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Parameter
1. The maximum index is 10 for each operator.
2. Allow to scan all GSM frequency even without SIM card inserted in the module.
2.1.2. AT+QENG Switch on or off Engineering Mode
Engineering Mode is designed to report the information of serving cells and the neighboring cells.
<index2>,<lac>,<ci>,<bsic>,<rxlev>,<arfcn><CR LF>
…
<indexN>,<lac>,<ci>,<bsic>,<rxlev>,<arfcn><CR LF>
+QOPS:<stat>,<Oper in string>,<oper in short
string>,<oper in number><CR LF>
….
OK
If error is related to ME functionality:
+CME ERROR: <err>
<stat> 0 Unknown
1 Operator available
2 Current Operator
3 Forbidden Operator
<Oper in string> Operator in long format alphanumeric
<Oper in short string> Operator in short format alphanumeric
<Oper in number> Operator in numeric format
<indexN> Radio frequency channel number in decimal display,
Renumber again under different operator
<lac> LocationArea Code in hex format, 4-byte in fixed width
<ci> Cell ID in hex format, 4-byte in fixed width
<bsic> Base Station Identity Code in hex format, 2-byte in fixed width
<rxlev> Receive level in decimal format, volatile width
<arfcn> Absolute Radio Frequency Channel Number in decimal format, volatile width
AT+QENG Switch on or off Engineering Mode
Test Command
AT+QENG=?
Response
+QENG: (list of supported <mode>s),(list of supported
<dump>s)
OK
NOTES
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Parameter
Read Command
AT+QENG?
Response
The type of the cell information URCs is control by <dump>
parameter:
+QENG: <mode>,<dump>
URCs of the serving cell information:
+QENG:
0,<mcc>,<mnc>,<lac>,<cellid>,<bcch>,<bsic>,<dbm>,<c1
>,<c2>,<txp>,<rla>,<tch>,<ts>,<maio>,<hsn><ta>,<rxq_s
ub>,<rxq_full>
URCs of 1-6 the neighboring cell information:
[+QENG: 1,list of (<ncell>,<bcch>,<dbm>,<bsic>,<c1>,
<c2>,<mcc>, <mnc>,<lac>,<cellid>)…]
URCs of cell frequency list(CA) of the serving cell:
[+QENG: 2,list of (<arfcn>)…]
OK
Write Command
AT+QENG =<mode>[,<dump>]
Response
Switch on or off engineering mode. It will report +QENG:
(network information) automatically if <mode>=2.
OK
ERROR
+CME ERROR: <err>
<mode> 0 Switch off engineering mode
1 Switch on engineering mode
2 Switch on engineering mode, and activate the URC report of network information
<dump> 0 Only display the information of serving cell
1 Display the information of serving cell and 1-6 neighboring cells
3 Display the information of serving cell and 1-6 neighboring cell, list of ARFCN and
Cell frequency list (CA) of the serving cell
<mcc> Mobile country code
<mnc> Mobile network code
<lac> Location area code in hex format
<cellid> Cell ID in hex format
<bcch> Absolute Radio Frequency Channel Number of Broadcast Control Channel BCCH
<bsic> Base station identity code
<dbm> Receive signal level in dBm unit
<c1> C1 value
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1. When mode is 2, auto URCs are reported per 5 seconds.
2. The <lac> and <cellid> parameters in hex format, other parameter is in decimal format.
3. If the cell information is not detected, the parameter is replaced by ‘x’ char.
4. If the detecting is not expert mode, the <tch>,<ts>, maio>, <hsn>, <ta>, <rxq_sub> and <rxq_full>
parameter do not display the value of the parameter and replaced by ‘x’ char.
5. Duration of the network connecting, if the hopping frequency is supported by the network, so the
channel of TCH is instable. Using the ’h’ figure <tch> under this mode.
6. Under expert mode, when the <c1> and <c2> of the serving cell cannot be updated. Using the ‘-1’
figure to display the illegal value. At the same time, the <txp> and <rla> parameter cannot be
updated in a certain condition, all the same holding the value of idle mode. This is because ME
cannot be updated in this mode and cannot update the selection of cell and reselection of the
parameter. When the connecting is over, mobile device goes back idle mode and gives out the
correct value.
7. If TA can report the information of the neighboring cell, the URCs of six neighboring cell should be
reported. If some cells cannot be measured, the ‘x’ char will be filled in the parameter of these cells.
8. Under the special mode, the <c1> and <c2> parameters of the neighboring cell may be measured,
then will report an unmeaning value. When the <mcc>, <mnc>, <lac> and <cellid> parameter of the
neighboring cell cannot be measured, the 'x' char will be filled in these parameters of all the six cells.
9. The command does not report the RX level and the RX quality. The AT+CSQ command can be used
to query the values of RX level and RX quality.
10. The AT+QSPCH command can be used to re-query the type of the voice channel during calling (FR,
HR, EFR,AMR_FR, AMR_HR).
<c2> C2 value
<txp> Transmit power maximum access a CCH
<rla> Receive level access minimum
<ts> Timeslots
<maio> MAIO value
<hsn> HSN value
<tch> ARFCN of TCH, ‘h’ figure hopping
<ta> Timing Advance, range 0~63
<rxq_sub> RX quality (sub), range 0-7
<rxq_full> RX quality (full), range 0-7
<ncell> Number of neighboring six cell ID 1~6
<arfcn> Absolute radio frequency channel number
NOTES
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2.1.3. AT+QLOCKF Lock the Base Station
This command can lock a specified Base Station.
Parameter
<arfcn> parameter is overlapped in the DCS1800 and PCS1900 bands, so <band1900> parameter can
distinguish which Band ARFCN is located.
2.1.4. AT+QCHINFO Get Channel Information
This command can report the detailed network information of the serving channel. It can be set as report
or query mode.
AT+QLOCKF Lock the Base Station
Test Command
AT+QLOCKF=?
Response
+QLOCKF: (list of supported <mode>s), (list of supported
<band1900>s) , (list of supported <freq>s)
OK
Read Command
AT+QLOCKF?
Response
+QLOCKF: <status>
OK
Write Command
AT+QLOCKF=<mode>,<band1900>,
<arfcn1>[,<arfcn2>] [,<arfcn3>]
Response
OK
ERROR
+CME ERROR: <err>
<mode> 0 Disable lock frequency
1 Enable lock frequency
<band1900> 0 Not a cell ID of 1900 band
1 Cell ID of 1900 band
<arfcn> 0-1024 ARFCN information
<status> 0 ME has not locked a certain ARFCN
1 ME has locked a certain ARFCN
NOTE
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Parameter
1. This command is available only when the parameter <mode> of the command
“AT+QENG=<mode>[,<dump>]” is 1 or 2.
2. The parameter <TA> will be changed when SMS CALL or GPRS is transmitted.
AT+QCHINFO Get Channel Information
Test Command
AT+QCHINFO=?
Response
OK
Read Command
AT+QCHINFO?
Response
+QCHINFO:
<rr_state>,<arfcn>,<dbm>,<ch_type>,<ta>,<rxq_sub>,<rx
q_full>
OK
Write Command
AT+QCHINFO=<0-1>
Response
Set the module whether automatic report QCHINFO
OK
<rr_state> 0 Null state
1 Inactive state
2 Cell select state
3 Idle state
4 Access state
5 Packet transfer state
6 Dedicated state
7 Cell reselect state
<arfcn> Frequency
<dbm> Receiving level in dBm
<ch_type> Channel type
<ta> TimingAdvance, the value 255 is unavailable
<rxq_sub> Receiving quality (sub), range is 0-7, the same as the parameter of QENG
<rxq_full> Receiving quality (full), range is 0-7, the same as the parameter of QENG
<0-1> 0 Automatic report
1 Non-automatic report
NOTES
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2.1.5. AT+QLASTTA Get TA Value
This command can get the last valid Time Advance.
Parameter
This command is available only when the parameter <mode> of the command
“AT+QENG=<mode>[,<dump>]” is 1 or 2.
2.1.6. AT+QFORBIDMNC Forbid Operator
The command can forbid the specified operator and radio bands. Even if the SIM card is not inserted, this
function can also be enabled.
Parameter
AT+QLASTTA Get TA Value
Test Command
AT+QLASTTA=?
Response
OK
Execution Command
AT+QLASTTA
Response
+QLASTTA: <value>
OK
<value> Last valid TA value
AT+QFORBIDMNC Forbid Operator
Test Command
AT+QFORBIDMNC=?
Response
+QFORBIDMNC: (list of supported <mode>s)[,(list of
supported <line>)][ ,(list of supported <forbidder>s)]
OK
Execution Command
AT+QFORBIDMNC=<mode>[,line][,for
bidden data]
Response
OK
ERROR
+CME ERROR: <err>
<mode> 0 Read a line of forbidden data
1 Write a line of forbidden data
NOTES
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The setting value can be stored in NVRAM automatically. The setting value can take effect when the
module is started next time.
2.1.7. AT+QSCANF Scan ARFCN Receiving Level
This command can scan the specified frequency or a certain band, then show the list of ARFCN and
RxLevel from the strongest signal level to the lowest when CFUN is 0 or 4.
2 Clean a line of forbidden data
3 Clean all forbidden data
4 Read the forbidden data [0]
5 Write the forbidden data [0]
<line> The parameter is line number of a forbidden data when <mode> is 0, 1 or 2. The
parameter is value of data [0] when <mode> is 4 or 5.
<forbidden data> String type in hex format. The detail is:
MCC + MNC + Band
0xff, 0xff, 0xff, 0xff, 0x00 ...
------------------- ---- ----
MCC + MNC Band force to zero
| |
| |
| |
| |
| ----> 0x00 => GSM 850
| 0x01 => GSM 900
| 0x02 => GSM 1800
| 0x03 => GSM 1900
|
-----> 0x00, 0x0f, 0xff => all country
0x73, 0x2f, 0xff => all networks in MCC=732
0x73, 0x20, 0x1f => MCC=732, MNC=01f
Example:
CMCC 850 46000f0000, 46002f0000, 46007f0000
CMCC 900 46000f0100, 46002f0100, 46007f0100
CMCC1800 46000f0200, 46002f00200, 46007f0200
AT+QSCANF Scan ARFCN Receiving Level
Test Command
AT+QSCANF=?
Response
+QSCANF: (list of supported <band>s),(list of supported
<arfcn>s))
NOTES
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Parameter
1. ScanARFCN receiving level in dBm when CFUN is 0 or 4.
2. List the receiving level of 20 CHs according to descending in dBm whenARFCN is 9999.
3. AT Command is invalid when AT+CFUN=1.
OK
Write Command
AT+ QSCANF=<band>,<arfcn>
Response
OK
ERROR
+CME ERROR: <err>
<band> 0 GSM900 band
1 DCS1800 band
2 PCS1900 band
3 GSM850 band
<arfcn> 0-1023 ARFCN or 9999
<status> 0 ME have not locked a certain ARFCN
1 ME have locked a certainARFCN
NOTES
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3Example
3.1. AT+QOPS
The module can scan all the GSM frequencies and report the detailed information of the Basic Station
even without SIM card inserted in it by this command. Two examples are shown as below:
With SIM card:
Call Ready //Phonebook initialized.
AT+QOPS? //Query nearby base station information.
+QOPS: 2,"CHINA MOBILE","CMCC","46000" //Current Operator CMCC.
1,1877,0872,34,60,9 //Discovery of nine CMCC base stations in the vicinity as below.
2,1877,01C2,18,39,581
3,1877,0013,31,43,22
4,1877,0012,29,33,2
5,1877,0152,0F,32,24
6,1877,01C3,0B,33,576
7,1877,03A3,32,30,583
8,1806,2031,1C,29,26
9,1877,0023,2E,30,16
+QOPS: 3,"CHINA UNICOM GSM","CU-GSM","46001" //Forbidden Operator CU-GSM.
1,144B,1ACD,18,40,118 //Discovery of seven CU-GSM base stations in the vicinity as below.
2,144B,C097,19,39,119
3,144B,CC12,13,31,123
4,144B,C096,16,29,111
5,144B,CC13,17,28,115
6,144B,8C52,15,28,716
7,144B,3E65,1B,27,733
OK
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Without SIM card inserted:
+CFUN: 1
+CPIN: NOT READY //Without SIM Card inserted.
AT+QOPS? //Query nearby base station information.
+QOPS: 2,"CHINA MOBILE","CMCC","46000"
1,1877,0872,34,60,9
2,1877,0013,31,40,22
3,1806,20A2,26,38,24
4,1877,01C3,0B,34,576
5,1877,01C2,18,31,581
6,1806,2031,1C,28,26
7,1877,03A3,32,28,583
8,1877,0012,29,30,2
9,1806,2032,2C,28,18
+QOPS: 1,"CHINA UNICOM GSM","CU-GSM","46001"
1,144B,C097,19,39,119
2,144B,1ACD,18,37,118
3,1059,6C8A,21,32,111
4,144B,CC12,13,29,123
5,144B,8C52,15,28,716
OK
3.2. AT+QENG
Engineering Mode is designed to allow a field engineer to view and test the network information received
by a module, when the module is either in idle mode or dedicated mode (that is: with a call active). In each
mode, the engineer is able to view network interaction for the "serving cell" (the cell the module is
currently registered with) or for the neighboring cells. Example is as the following.
AT+QENG =1,3 //Enable engineering mode 1.
OK
AT+QENG? //Display the serving cell information, 1-6 neighboring cell information list of
ARFCN and cell frequency list (CA) of the serving cell.
+QENG: 1,3
+QENG: 0,460,00,1877,872,9,52,-49,185,185,5,14,x,x,x,x,x,x,x //Base station information of the serving
cell,ARFCN of which is 9.
+QENG:
1,1,24,-71,15,99,99,460,00,1877,152,2,26,-83,28,52,36,460,00,1806,2031,3,13,-85,42,41,41,460,00,187
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7,151,4,516,-95,48,12,28,460,00,1806,2081,5,x,x,x,x,x,x,x,x,x,6,x,x,x,x,x,x,x,x,x //The neighboring
cell information.
+QENG: 2,9,55,64,68,83,94 //Cell frequency list (CA) of the serving cell (ARFCN is 9).
OK
3.3. AT+QLOCKF
By getting some information of the nearby Base Stations via AT+QOPS or AT+QENG, and locking a
certain Base Station using AT+QLOCKF command, the module can work very well. The following is the
example on how to lock the base station after querying Base Station information via AT+ QENG.
RDY
+CFUN: 1
+CPIN: NOT INSERTED //Without SIM card inserted.
AT+QENG=1,1
OK
AT+QENG?
+QENG: 1,1
+QENG: 0,460,00,1877,872,9,52,-62,159,159,5,8,x,x,x,x,x,x,x
+QENG:
1,1,22,-73,49,115,115,460,0,1877,13,2,24,-77,15,98,98,460,0,1877,152,3,26,-83,28,57,57,460,0,1806,2
031,4,49,-84,55,71,71,460,0,1877,871,5,583,-86,50,63,63,460,0,1877,3a3,6,15,-88,54,53,53,460,0,1877
,11
OK
AT+QLOCKF =1,0,22 //Lock to the base station of 22 and itsARFCN is 22. Since 22 is not belonged
to the 1900 band, so the second parameter is 0.
OK
AT+QENG?
+QENG: 1,1
+QENG: 0,460,00,1877,13,22,49,-76,102,102,5,8,x,x,x,x,x,x,x //Lock to 22 successfully.
+QENG:
1,1,x,x,x,x,x,x,x,x,x,2,x,x,x,x,x,x,x,x,x,3,x,x,x,x,x,x,x,x,x,4,x,x,x,x,x,x,x,x,x,5,x,x,x,x,x,x,x,x,x,6,x,x,x,
x,x,x,x,x,x
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OK
AT+QLOCKF? //Whether or not to lock the base station.
+QLOCKF: 1 //Already locked.
OK
AT+QLOCKF=0 //Unlock all.
OK
AT+QLOCKF? //Whether or not to lock the base station.
+QLOCKF: 0 //Not locked.
OK
AT+QLOCKF=1,0,26,49,15 //Lock to 26,49,15 three frequency points.
OK
AT+QENG?
+QENG: 1,1
+QENG: 0,460,00,1877,871,49,55,-86,64,64,5,8,x,x,x,x,x,x,x
+QENG:
1,1,26,-86,28,47,47,460,0,1806,2031,2,15,-91,54,43,43,460,0,1877,11,3,x,x,x,x,x,x,x,x,x,4,x,x,x,x,x,x,x
,x,x,5,x,x,x,x,x,x,x,x,x,6,x,x,x,x,x,x,x,x,x
OK
AT+QLOCKF=0 //Unlock all
OK
3.4. AT+QCHINFO
This command can report the detailed network information of the serving channel. It can be set as report
or query mode. The example is as below.
AT+QENG=1,3 //Enable engineering mode 1.
OK
AT+QCHINFO? //Query detailed information of the serving channel.
+QCHINFO: 3,9,-50,8,255,255,255
OK
ATD15618380236;
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OK
AT+QLOCKF=1,0,22
OK
AT+QCHINFO? //Query the serving channel information.
+QCHINFO: 6,22,-71,27,2,6,4 //TA value changes.
OK
3.5. AT+QLASTTA
The command can get last valid TimeAdvance .The example is as below.
AT+QENG=1,1 //Enable engineering mode.
OK
AT+QENG? //Query engineering mode information.
+QENG: 1,1
+QENG: 0,460,00,1877,872,9,52,-56,182,182,5,8,x,x,x,x,x,x,x //Display the serving cell information.
+QENG:
1,1,22,-68,49,135,119,460,0,1877,13,2,24,-69,38,132,116,460,0,1806,20a2,3,583,-76,50,104,88,460,0,1
877,3a3,4,26,-77,28,82,66,460,0,1806,2031,5,49,-79,31,89,73,460,0,1877,511,6,584,-86,33,46,62,460,0
,1806,2081 //The neighboring cell information.
OK
AT+QLOCKF=1,0,22
OK
ATD15618380236;
OK
AT+QLASTTA //Query the last TA value.
+QLASTTA: 2
OK
Quectel
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