Neoway M590E User manual

Neo_M590E V1 GPRS Module
AT Command Set
Version 1.0

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd 2016.All rights reserved.
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Notice
This document provides guide for users to use the M590E V1.
This document is intended for system engineers (SEs), development engineers, and test engineers.
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other reasons.
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Neo_M590E V1 GPRS Module AT Command Set
Revision Record
Issue
Changes
Date
V1.0
Initial draft
2016-02-27

Neo_M590E V1 GPRS Module AT Command Set
Contents
Boot LOG Instruction.................................................................................................................. 1
1 General Commands .................................................................................................................. 2
1.1 Querying the Manufacturer: I ......................................................................................................................2
1.2 Querying the Version: +GMR......................................................................................................................2
1.3 Querying Signal Quality: +CSQ ..................................................................................................................2
1.4 Querying the Network Registration Status: +CREG....................................................................................3
1.5 GPRS Network Registration: +CGREG ......................................................................................................4
1.6 Querying IMEI: +CGSN..............................................................................................................................5
1.7 Restart the Module: +CFUN........................................................................................................................6
1.8 Multiplexing Mode: +CMUX......................................................................................................................6
1.9 Setting the Baudrate of the Module: +IPR...................................................................................................7
1.10 Querying the Module Status: +CPAS.........................................................................................................8
1.11 Enabling or Disabling the Sleep Mode: +ENPWRSAVE ..........................................................................9
1.12 Clock: +CCLK...........................................................................................................................................9
1.13 Entering the PIN Codes: +CPIN ..............................................................................................................10
1.14 Enabling PIN and Querying MT and Network Device: +CLCK .............................................................11
1.15 Modifying the Password of the PIN: +CPWD.........................................................................................12
1.16 Setting GPRS Attach and Detach: +CGATT............................................................................................12
1.17 Setting PDP Format: CGDCONT ............................................................................................................13
1.18 GPRS Dialup: ATD*99#..........................................................................................................................14
1.19 Switching Data Mode to Command Mode: +++......................................................................................14
1.20 Switching Command Mode to Data Mode: O..........................................................................................15
1.21 Selecting and Registering a GSM Network: +COPS...............................................................................15
2 SMS Commands...................................................................................................................... 17
2.1 Setting Preferred SMS Storage: +CPMS ...................................................................................................17
2.2 Setting SMS Inputting Mode: +CMGF......................................................................................................18
2.3 Setting the TE Character Set: +CSCS........................................................................................................18
2.4 Setting the SMS Indication Mode: +CNMI ...............................................................................................19
2.5 Reading SMS Messages: +CMGR.............................................................................................................21
2.6 SMS Message List: +CMGL......................................................................................................................22
2.7 Sending SMS Messages: +CMGS .............................................................................................................23
2.8 Writing SMS Messages: +CMGW.............................................................................................................24
2.9 Sending Stored SMS Messages: +CMSS...................................................................................................25
2.10 Deleting SMS Messages: +CMGD..........................................................................................................26
2.11 Setting the SMS Center Number: +CSCA...............................................................................................26
2.12 Setting the Parameters of the Text Mode: +CSMP ..................................................................................27
2.13 Displaying the Parameters of the Text Mode: +CSDH ............................................................................27
3 TCP/UDP Data Service........................................................................................................... 28
3.1 Setting Up a PPP Link: +XIIC...................................................................................................................28
3.2 Setting Up TCP connection: +TCPSETUP................................................................................................29
3.3 Sending TCP Data: +TCPSEND................................................................................................................30
3.4 Receiving TCP Data: +TCPRECV ............................................................................................................31
3.5 Closing TCP Connection: +TCPCLOSE ...................................................................................................31

Neo_M590E V1 GPRS Module AT Command Set
3.6 Setting Up UDP Connection: +UDPSETUP..............................................................................................31
3.7 Sending UDP Data: +UDPSEND ..............................................................................................................32
3.8 Receiving UDP Data: +UDPRECV...........................................................................................................33
3.9 Closing UDP Connection: +UDPCLOSE..................................................................................................33
3.10 Querying TCP/UDP Connection Status: +IPSTATUS .............................................................................34
3.11 Setting Local UDP Port: +UDPLPORT...................................................................................................34
3.12 Setting Up TCP Transparent Transmission Connection: +TCPTRANS ..................................................35
3.13 Setting Up UDP Transparent Transmission Connection: +UDPTRANS.................................................35
3.14 Setting Automatic TCP Data Sending: +TCPAUTO................................................................................36
4 DNS Command ....................................................................................................................... 39
4.1 Querying the IP Address: +DNS................................................................................................................39
5 FTP AT Commands................................................................................................................. 40
5.1 Logging In to the FTP Server: +FTPLOGIN.............................................................................................40
5.2 Logging Out from the FTP Server: +FTPLOGOUT..................................................................................41
5.3 Downloading Data from the FTP Server: +FTPGET.................................................................................41
5.4 Uploading Data to the FTP Server: +FTPPUT ..........................................................................................42
5.5 Querying FTP Connection Status: +FTPSTATUS .....................................................................................43
6 TCP Server AT Commands ................................................................................................... 44
6.1 Setting TCP Listening for the Server: +TCPLISTEN................................................................................44
6.2 Closing the Listening Connection: +CLOSELISTEN ...............................................................................44
6.3 Closing Connections of the Client: +CLOSECLIENT ..............................................................................45
6.4 Receiving Data from the Client: +TCPRECV(S) ......................................................................................45
6.5 Sending Data to the Client: +TCPSENDS.................................................................................................45
6.6 Querying the Connection Status on the Client: +CLIENTSTATUS ..........................................................46
7 Unlimited UDP Server AT Commands............................................................................... 47
7.1 Setting UDP Listening for Server: +FUDPLISTEN..................................................................................47
7.2 Receiving Data from the Client: +FUDPRECV(S)....................................................................................48
7.3 Sending Data to the Client: +FUDPSENDS ..............................................................................................48
7.4 Closing Listening for UDP Server: +CLOSEFUDPLISTEN.....................................................................48
8 LBS Command ......................................................................................................................... 50
8.1 Obtaining the Location of the Module: +CIPGSMLOC............................................................................50
9 Other AT Commands ............................................................................................................. 52
9.1 Querying Base Station Information: +POSI...............................................................................................52
9.2 Getting the Local Port of a Socket: +GETLPORT.....................................................................................53
10 TCP Command Example Process ....................................................................................... 54
10.1 TCP Link through Internal Protocol.........................................................................................................54
10.2 TCP Connection through External Protocol.............................................................................................55
A Reference Process of AT Command Programming ......................................................... 57
A.1 Content of PDU SMS Messages ...............................................................................................................57
A.2 Flowchart of Sending Text SMS Messages (Through UART)..................................................................59
A.3 Flowchart of Sending PDU SMS Messages (Through UART).................................................................60

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
1
Boot LOG Instruction
The default baudrate of the module is in automatic detection. The mobile terminal (MT) sendsAT\r in
accordance with the standard baudrate (9600bps, 19200bps, 38400bps, 57600bps, and 115200bps), and the
module will automatically detect the baudrate. Before your repower on the module, it accomplishes UART
communications at the automatically detected baudrate. If you need to change the original baudrate during
communication, you must set a new baudrate for the module on the MT. Then the MT will change its
transmitting baudrate.
If you send AT+IPR to the module to set the baudrate to a certain value, the module cannot automatically
detect a baudrate unless you run the command AT+IPR=0\r.
After the module is started, send AT\r to the UART1 of the module. The module returns AT characters,
indicating that the baudrate matches successfully. Send AT\r to the UART again and the module will return OK.
Then, the module is ready to executeAT commands.
Boot log in automatic baudrate detection
The module will not output any boot log before you enter an AT command because the baudrate is unknown.
\r\nMODEM:STARTUP\r\n is output if you enter AT/r before starting the module and
\r\nMODEM:STARTUP\r\n is output after the phonebook is ready.
Only \r\n+PBREADY\r\n is output after the phonebook is ready if you enter AT/r after starting the
module.

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
2
1General Commands
1.1 Querying the Manufacturer: I
Description
To query the manufacturer information, including manufacturer, model, and version
Format
ATI<CR>
Parameter
N/A
Return Value
<CR><LF><Manufacturer>
<CR><LF><Module mode>
<CR><LF> <Version>
<CR><LF>OK<CR><LF>
Example
ATI
NEOWAY
M590 V1
REVISION V001
OK
Manufacturer
Module mode
Version
Remarks
N/A
1.2 Querying the Version: +GMR
Description
To query the software version
Format
AT+GMR<CR>
Parameter
N/A
Return Value
<CR><LF>+GMR: <version>
<CR><LF>OK<CR><LF>
Example
AT+GMR
+GMR: M590_1169_R9S63000_V001
OK
Query the version of the software.
Remarks
N/A
1.3 Querying Signal Quality: +CSQ
Description
To check the receiving signal strength indication (RSSI) and the bit error rate (BER) of the
channel
Format
AT+CSQ<CR>
Parameter
N/A

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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Return Value
<CR><LF> +CSQ: < signal >,<ber>
<CR><LF> OK <CR><LF>
< signal>
The following table shows the relationship between the signal and the RSSI.
signal
rssi
0
<4 or 99
<-107 dBm or unknown
1
<10
<-93dBm
2
<16
<-71 dBm
3
<22
<-69dBm
4
<28
<-57dBm
5
>=28
>=-57 dBm
<ber>
0...7
Refer to the value of RXQUAL in the table of GSM 05.08 8.2.4.
99
Not known or not detectable
Example
AT+CSQ
+CSQ: 19,2
OK
Query the current signal strength of the
module.
Remarks
N/A
1.4 Querying the Network Registration Status: +CREG
Description
To query the network registration status of the module
Format
AT+CREG=[<n>]<CR>
AT+CREG?<CR>
AT+CREG=?<CR>
Parameter
<n>:
0: Forbid unsolicited result codes of network registration (default setting).
1: Allow unsolicited result codes of network registration
2: Allow unsolicited location information of network registration
<stat>:
0: Unregistered. The device is not searching for new carriers.
1: Registered the local network
2: Unregistered. The device is searching for base stations.
3: The registration is rejected.
4. Unknown code
5: Registered, roaming
<lac>: string type; two-byte location area code in hexadecimal format

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
4
<ci>: string type; two-byte cell ID in hexadecimal format
<Act>:
0: GSM
2: UTRAN
3: GSM w/EGPRS
Return Value
<CR><LF>OK<CR><LF>
<CR><LF>+CREG: <n>,<stat>[,<lac>,<ci>[,<Act>]]
<CR><LF>OK<CR><LF>
<CR><LF>+CREG: (list of supported <n>s)
<CR><LF>OK<CR><LF>
Example
AT+CREG=1
OK
Allow the module to provide
unsolicited network registration code.
AT+CREG?
+CREG: 0,1
OK
Query the network registration status
of the module.
AT+CREG=?
+CREG: (0-2)
OK
Query the value range of the network
registration status.
Remarks
N/A
1.5 GPRS Network Registration: +CGREG
Description
To control the presentation of an unsolicited result code of the module's GPRS network
registration status
Format
AT+CGREG=[<n>]<CR>
AT+CGREG?<CR>
AT+CGREG=?<CR>
Parameters
<n>: Specifies whether to enable network registration unsolicited result code
0: Disable network registration unsolicited result code (default)
1: Enable network registration unsolicited result code
2: Enable network registration and location information unsolicited result code
<stat>: GPRS registration status, integer type
0: Not registered, the module is not currently searching an operator to register to
1: Registered the home network
2: Not registered, but the module is currently trying to attach or searching an operator to
register to
3: Registration denied
4: Unknown code

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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5: Registered, roaming
<lac>: Two byte location area code in hexadecimal format, string type
<ci>: four byte GERAN/UTRAN cell ID in hexadecimal format, string type
<Act>: The access technology of the serving cell, integer type
0: GSM
2: UTRAN
3: GSM w/EGPRS
Return Value
<CR><LF>OK<CR><LF>
<CR><LF>+CGREG: <n>,<stat>[,<lac>,<ci>[,<Act>]]
<CR><LF>OK<CR><LF>
<CR><LF>+CGREG: (list of supported <n>s)
<CR><LF>OK<CR><LF>
Example
AT+CGREG?
+CGREG: 0,1
OK
Query the current GPRS network
registration status. The network registration
unsolicited result code is disabled.
AT+CGREG=1
OK
Enable network registration result code.
AT+CGREG=?
+CGREG: (0-2)
OK
Query the available parameter range.
Remarks
After the module registers the GPRS network, the data service is available.
1.6 Querying IMEI: +CGSN
Description
To query the International Mobile Equipment Identity (IMEI) of the module
Format
AT+CGSN<CR>
Parameter
N/A
Return Value
<CR><LF>+CGSN: <IMEI>
<CR><LF>OK<CR><LF>
Example
AT+CGSN
+CGSN: "860998021170687"
OK
Query the IMEI number.
Remarks
The IMEI is a character string of 15 digits.

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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1.7 Restart the Module: +CFUN
Description
To restart the module
Format
AT+CFUN=<fun>,<rst><CR>
AT+CFUN?<CR>
AT+CFUN=?<CR>
Parameter
<fun>: Module work mode
0: sleep mode
1: work mode
<rst>: Specifies whether to restart the module
0: Do not restart the module
1: Restart the module
Return Value
<CR><LF>OK<CR><LF>
or
<CR><LF>ERROR<CR><LF>
<CR><LF>+CFUN: <fun>
<CR><LF>OK<CR><LF>
<CR><LF>+CFUN: (list of supported <fun>s), (list of supported <rst>s)
<CR><LF>OK<CR><LF>
Example
AT+CFUN=1,1
OK
Restart the module
AT+CFUN?
+CFUN: 1
OK
Query the current functions.
AT+CFUN=?
+CFUN: (0,1),(0,1)
OK
Query the range of the parameter value.
Remarks
N/A
1.8 Multiplexing Mode: +CMUX
Description
To enable/disable the GSM 07.10 multiplexing protocol control channel
Format
AT+CMUX=<mode>[,<subset>[,<port_speed>[,<N1>[,<T1>[,<N2>[,<T2>[,<T3>[,<
k>]]]]]]]]<CR>
AT+CMUX=?<CR>
Parameter
<mode>: integer type (multiplexer Transparency Mechanism)
0: Basic option
1: Advanced option (not supported)
<subset>: integer type.

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
7
0: UIH frames used only (default value)
1: UI frames used only (not supported)
<port_speed>:integer type (transmission rate)
1: 9600 bit/s
2: 19200 bit/s
3: 38400 bit/s
4: 57600 bit/s
5: 115200 bit/s
6: 230400 bit/s
7: 460800 bit/s
8: 921600 bit/s
<N1>: integer type (maximum frame size), ranging from 1 to 32767, where the 512 is
default
<T1>: integer type (acknowledgement timer in units of ten milliseconds), ranging from 1
to 255, where 10 is default (100 ms)
<N2>: integer type (maximum number of re-transmissions) (not supported)
<T2>: integer type (response timer for the multiplexer control channel in units of ten
milliseconds) (not supported)
<T3>: integer type (wake up response timer in seconds) (not supported)
<k>: integer type (window size) (not supported)
Return Value
<CR><LF>OK<CR><LF>
Example
AT+CMUX=0
OK
Basic option. Other parameters are left out.
AT+CMUX=?
+CMUX: (0)
OK
Query the available range of parameters.
Remarks
Only default setting is supported.
1.9 Setting the Baudrate of the Module: +IPR
Description
To set the baudrate of the module
Format
AT+IPR=<baud rate><CR>
AT+IPR?<CR>
AT+IPR=?<CR>
Parameter
<baud rate>: Baudrate
The value can be: 0, 2400, 4800, 9600, 14400, 19200, 28800, 33600, 38400, 57600,
115200, 230400, 460800, 921600, and 1843200.
Return Value
<CR><LF>OK<CR><LF>
<CR><LF>+IPR: <baud rate><CR><LF>
<CR><LF>OK<CR><LF>

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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<CR><LF>+IPR: (list of supported <baud rate>s) <CR><LF>
<CR><LF>OK<CR><LF>
Example
AT+IPR=115200
OK
Set the baudrate of the module to
115200 bit/s.
AT+IPR?
+IPR: 115200
OK
Query the current baudrate of the
module.
AT+IPR=?
+IPR:
0,2400,4800,9600,14400,19200,28800,33600,38
400,57600,115200,230400,460800,921600,1843
200
OK
Query the valid baudrate range of the
module.
Remarks
If the queried baudrate is 0, the baudrate is not set for the module.
The settings by this command will be saved after the module is powered off.
The module can automatically detect the following baudrate: 9600, 14400, 19200,
38400, 57600, and 115200.
1.10 Querying the Module Status: +CPAS
Description
To query the work status of the module
Format
AT+CPAS<CR>
AT+CPAS?<CR>
Parameter
<pas>:
0: ready. The module is ready and is able to execute AT commands.
1: unavailable. The command is not allowed by the module terminal (MT).
3: ringing. There is an incoming call and the module is ringing. The module can execute
AT commands.
4: call in progress. A call is going on and the module can execute AT commands.
Return Value
<CR><LF>+CPAS: <pas>
<CR><LF>OK<CR><LF>
<CR><LF>+CPAS: (list of supported < pas >s)
<CR><LF>OK<CR><LF>
Example
AT+CPAS
+CPAS: 0
OK
Query the work status of the module.
The module is ready to execute AT commands.
AT+CPAS=?
+CPAS: 0,1,3,4
OK
To query the value range of the module work status

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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Remarks
N/A
1.11 Enabling or Disabling the Sleep Mode:
+ENPWRSAVE
Description
To enable or disable the sleep mode
Format
AT+ENPWRSAVE=<n><CR>
AT+ENPWRSAVE?<CR>
AT+ENPWRSAVE=?<CR>
Parameter
<n>:
0: Disable the sleep mode. (Default)
1: Enable the sleep mode (The module enters the sleep mode when the DTR signal is at
low level and exits from the sleep mode at high level).
Return Value
<CR><LF>OK<CR><LF>
<CR><LF>+ENPWRSAVE:<n><CR><LF>
<CR><LF>OK<CR><LF>
<CR><LF>+ENPWRSAVE:(list of supported <n>s)<CR><LF>
<CR><LF>OK<CR><LF>
Example
AT+ENPWRSAVE=1
OK
Enable the sleep mode of the module.
AT+ENPWRSAVE?
+ENPWRSAVE: 1
OK
Query the enabling status of the sleep mode
of the module.
AT+ENPWRSAVE=?
+ENPWRSAVE:0,1
OK
To query the value range of the
module work status
Remarks
The setting of the parameter <n> will not be saved after the module is powered off.
After the sleep mode is enabled and the DTR signal is at low level, the module can
enter the sleep mode only when all circuits of the module allows the sleep mode.
1.12 Clock: +CCLK
Description
To set and query the real-time clock
Format
AT+CCLK=<time><CR>
AT+CCLK?<CR>
Parameter
< time >: Character string in format of "yy/MM/dd,hh:mm:ss+TZ".
TZ: Two digits, indicating the time lag between the local time and the GMT time. This
information is optional because it can be displayed only when the network supports it. A
pair of quotation marks ("") is required.

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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Return Value
<CR><LF>OK<CR><LF>
<CR><LF>+CCLK: <time>
<CR><LF> OK<CR><LF>
Example
AT+CCLK="08/07/01,14:54:01"
OK
Set the real-time clock of the module.
AT+CCLK?
+CCLK: "08/07/01,14:54:10"
OK
Query the setting of the real-time clock.
AT+CCLK=14/07/02,10:48:50
ERROR
Command format is incorrect.
Remarks
The settings will not be saved after the module is powered off.
1.13 Entering the PIN Codes: +CPIN
Description
To query the PIN status and enter the PIN codes
Format
AT+CPIN=<pin>[,<newpin>]<CR>
AT+CPIN?<CR>
Parameter
<pin>, <newpin>:string type with a pair of quotation marks ("")
<PUK>: PUK code of the SIM card
<PIN>: PIN code of the SIM card
Return Value
<CR><LF>+CPIN:<code>
<CR><LF>OK<CR><LF>
<code>:
READY: No password
SIM PIN: Enter PIN code.
SIM PUK: Enter PUK code.
SIM PIN2: Enter PIN2 code.
SIM PUK2: Enter PUK2 code.
Example
AT+CPIN?
+CPIN:READY
OK
Query the PIN code status of the module.
AT+CPIN="0000"
ERROR
PIN code is incorrect.
AT+CPIN="1234"
OK
The input PIN code is correct.
Remarks
To enter PIN code, you must lock the current SIM card (running
AT+CLCK="SC",1,"1234") and then restart the module.
If you enter wrong PIN code for three times, you must enter PUK to unlock.

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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1.14 Enabling PIN and Querying MT and Network
Device: +CLCK
Description
To lock, unlock or interrogate an ME or a network facility
Format
AT+CLCK=<fac>,<mode>[,<passwd>[,<class>]]<CR>
AT+CLCK=?<CR>
Parameter
<fac>: A pair of quotation marks is required for the value.
"OI": Outgoing international calls
"AI": All incoming calls
"IR": Incoming calls when roaming outside the home country
"SC": SIM card
"AO": All outgoing calls
"OX": All outgoing international calls except to the home country
"FD": SIM fixed dialing memory feature
<mode>:
0: Unlock
1: Lock
2: Query the status
<status>:
0: not active
1: active
<passwd>: Password or code, string type. A pair of quotation marks is required for the
value.
<classx>:
1: Voice service
2: Data service
4: Fax service
8: SMS
16: Synchronous data service
32: Asynchronous data service
64: Dedicated packet access
128: Dedicated PAD access
Return Value
When <mode>=2 and command successful:
<CR><LF>+CLCK:<status> [, <class1> [<CR><LF>+CLCK:<status>, <class2>
[...]]<CR><LF>
Example
AT+CLCK="SC",2
+CLCK: 0
OK
AT+CLCK=?
+CLCK:("SC","AO","OX","FD","OI")
OK
Query the network information related to
the module.

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
12
AT+CLCK="SC",0,"1234"
OK
Lock the current SIM card. "1234" is the
PIN code of current SIM card.
AT+CLCK="SC",1,"2222"
ERROR
The PIN code is incorrect.
Remarks
The settings of this command take effect after the module is restarted.
1.15 Modifying the Password of the PIN: +CPWD
Description
To modify the password of the lock function of the module
Format
AT+CPWD=<fac>,<oldpwd>,<newpwd><CR>
AT+CPWD=?<CR>
Parameter
<fac>: A pair of quotation marks is required for the value.
"P2":SIM PIN2
"SC": SIM card
<oldpwd>: Old password or code, string type. A pair of quotation marks is required for
the value.
<newpwd>: New password or code, string type. A pair of quotation marks is required for
the value.
Return Value
<CR><LF>OK<CR><LF>
<CR><LF>+CPWD: list of supported (<fac>,<pwdlength>)s
<CR><LF>OK<CR><LF>
<CR><LF> ERROR<CR><LF>
Example
AT+CPWD=?
+CPWD: ("SC",8),("P2",8)
OK
Query the service range of the PIN
password allowed by the module.
AT+CPWD="SC","1234","0000"
OK
Modify the PIN code of the current SIM
card. "1234" is the old PIN code and
"0000" is the new PIN code.
AT+CPWD=SC,1234,0000
ERROR
The command format is incorrect. A pair
of quotation marks ("") is required for
each parameter.
Remarks
To modify the PIN code, you must lock the SIM card (running
AT+CLCK="SC",1,"1234").
1.16 Setting GPRS Attach and Detach: +CGATT
Description
To set GPRS attach and detach
Format
AT+CGATT=<state><CR>
AT+CGATT?<CR>
AT+CGATT=?<CR>

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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Parameter
<state>: 0, 1
0: indicates detach
1: indicates attach
Return Value
See the Example.
Example
AT+CGATT=1
OK
GPRS attach is set successfully.
AT+CGATT=0
OK
GPRS detach is set successfully.
AT+CGATT=0
ERROR
No SIM card is installed, so the module
returns ERROR.
AT+CGATT?
+CGATT: 0
OK
Query the GPRS status.
AT+CGATT=?
+CGATT:(0-1)
OK
Query the valid parameter values for the
command.
Remarks
By default, the module can automatically perform GPRS attach.
Ensure that the GPRS attach is set before the PPP connection is set up. It is
recommended that you add the AT+CGATT? command to the process to query the
GPRS status. If the module returns 1, you can set up PPP connection directly;
otherwise, you need to set GPRS attach manually by executing the command
AT+CGATT=1.
1.17 Setting PDP Format: CGDCONT
Description
To set the packet data protocol (PDP) format of the GPRS
Format
AT+CGDCONT=<cid>,<type>,<APN><CR>
Parameter
<cid>:(PDP Context Identifier) a numeric parameter that specifies a particular PDP
context definition. The parameter is local to the TE-MT interface and is used in other
PDP context-related commands. The range of permitted values (minimum value = 1) is
returned by the test form of the command.
<type>:(Packet Data Protocol type) a string parameter. IP Internet Protocol (IETF STD 5)
<APN>:(Access Point Name) a string parameter which is a logical name that is used to
select the GGSN or the external packet data network. If the value is null or omitted, then
the subscription value will be requested.
<addr>:a string parameter that identifies the MT in the address space applicable to the
PDP. If the value is null or omitted, then a value maybe provided by the TE during the
PDP startup procedure or, failing that, a dynamic address will be requested. The read
form of the command will continue to return the null string even if an address has been
allocated during the PDP startup procedure. The allocated address may be read using the
+CGPADDR command.
<d_comp>: a numeric parameter that controls PDP data compression (applicable for
SNDCP only)

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
14
0: off (default if value is omitted)
<h_comp>:a numeric parameter that controls PDP header compression
0: off (default if value is omitted)
<pd1>, … <pdN>: zero to N string parameters whose meanings are specific to the
<PDP_type>
Return Value
See the Example.
Example
AT+CGDCONT=1, "IP","CMNET"
OK
Set APN of the first PDP to CMNET.
AT+CGDCONT=2, "IP","CMNET"
OK
Set APN of the second PDP to CMNET.
AT+CGDCONT=1, "IP","UNINET"
OK
Set APN of the first PDP to UNINET.
AT+CGDCONT=2, "IP","UNINET"
OK
Set APN of the second PDP to UNINET.
Remarks
The APN of each carrier is different from each other.
1.18 GPRS Dialup: ATD*99#
Description
GPRS dialup through the external protocol
Format
ATD*99#<CR>
Parameter
N/A
Return Value
<CR><LF>CONNECT<CR><LF>
Example
ATD*99#
CONNECT
Dial up
Successful
ATD*99#
ERROR
No SIM card is installed.
Remarks
This command is applicable only to external protocol.
Ensure that the module has registered the network and APN has been set before
dialup.
1.19 Switching Data Mode to Command Mode: +++
Description
To switch the module from the data mode to the command mode
Format
+++
Parameter
N/A
Return Value
See the Example.
Example
+++
Switch to command mode

Neo_M590E V1 GPRS Module AT Command Set
Copyright © Neoway Technology Co., Ltd
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OK
Remarks
This command can be used only for external protocol stack.
1.20 Switching Command Mode to Data Mode: O
Description
To switch the module from the command mode to the data mode
Format
ATO<CR>
Parameter
N/A
Return Value
See the Example.
Example
ATO
CONNECT
Switch to data mode.
Remarks
This command can be used only for external protocol stack.
1.21 Selecting and Registering a GSM Network: +COPS
Description
To select and register a GSM network
Format
AT+COPS=[<mode>[,<format>[,<oper>>[,<AcT>]]]]
AT+COPS?<CR>
AT+COPS=?<CR>
Parameter
<mode>: To set automatic network selection or manual selection:
0: Automatic selection (ignore the parameter <oper>)
1: Manual selection
2: Deregister from the network
3: Set <format>only
4: Manual/automatic selection (if the manual selection fails, automatic mode starts)
<format>:
0: Long alphanumeric <oper> (default value)
1: Short format alphanumeric <oper>
2: Numeric <oper>
<oper>: It is given in <format>. This field may be in 16-character long alphanumeric
format, 8-characters short alphanumeric format, or 5-character numeric format
(MCC/MNC).
<AcT>: Indicates the radio access technology and its value can be 0, 1, and 2.
0: GSM
1: GSM compact
2: UTRAN
Return Value
<stat>:
0: Unknown network