Page is loading ...
AT Commands Manual
Issue 1.0 Date 2020-10-17
N77 AT Commands Manual
Copyright
Copyright © Neoway Technology Co., Ltd
ii
Copyright © Neoway Technology Co., Ltd 2020. All rights reserved.
No part of this document may be reproduced or transmitted in any form or by any means without prior written
consent of Neoway Technology Co., Ltd.
is the trademark of Neoway Technology Co., Ltd.
All other trademarks and trade names mentioned in this document are the property of their respective
holders.
Notice
This document provides guide for users to use N77.
This document is intended for system engineers (SEs), development engineers, and test engineers.
THIS GUIDE PROVIDES INSTRUCTIONS FOR CUSTOMERS TO DESIGN THEIR APPLICATIONS.
PLEASE FOLLOW THE RULES AND PARAMETERS IN THIS GUIDE TO DESIGN AND COMMISSION.
NEOWAY WILL NOT TAKE ANY RESPONSIBILITY OF BODILY HURT OR ASSET LOSS CAUSED BY
IMPROPER OPERATIONS.
THE INFORMATION IN THIS DOCUMENT IS SUBJECT TO CHANGE WITHOUT NOTICE DUE TO
PRODUCT VERSION UPDATE OR OTHER REASONS.
EVERY EFFORT HAS BEEN MADE IN PREPARATION OF THIS DOCUMENT TO ENSURE ACCURACY
OF THE CONTENTS, BUT ALL STATEMENTS, INFORMATION, AND RECOMMENDATIONS IN THIS
DOCUMENT DO NOT CONSTITUTE A WARRANTY OF ANY KIND, EXPRESS OR IMPLIED.
Neoway provides customers complete technical support. If you have any question, please contact your
account manager or email to the following email addresses:
Website: http://www.neoway.com
N77 AT Commands Manual
Contents
Copyright © Neoway Technology Co., Ltd
iii
Contents
1 AT Syntax................................................................................................. 12
1.1 Symbols ...................................................................................................................................... 12
1.2 Description ................................................................................................................................. 12
1.3 Command Types ........................................................................................................................ 13
2 General Commands ................................................................................ 14
2.1 ATI–Querying Manufacturer Information................................................................................... 14
2.2 AT+CGMR–Querying Software Version ................................................................................... 14
2.3 AT+CSQ–Querying Signal Quality ............................................................................................ 15
2.4 AT+CREG–Querying Network Registration Status .................................................................. 16
2.5 AT+CEREG–Querying EPS Network Registration Status ........................................................ 18
2.6 AT+COPS–Selecting and Registering Network ........................................................................ 19
2.7 AT+CIMI–Querying IMSI ........................................................................................................... 20
2.8 AT+CGSN–Querying IMEI ........................................................................................................ 21
2.9 AT+CCID–Obtaining the ICCID of the SIM Card ...................................................................... 22
2.10 AT+CGMM–Querying Module Model ...................................................................................... 23
2.11 AT+GMM–Querying Module Model ........................................................................................ 23
2.12 AT+IPR–Setting Baud Rate .................................................................................................... 24
2.13 AT+CFUN–Setting Module Functionality ................................................................................ 25
2.14 AT+CMUX–Activating Multiplexing Mode ............................................................................... 26
2.15 AT+CCLK–Clock ..................................................................................................................... 27
2.16 AT+CPIN–Entering PIN Code ................................................................................................. 28
2.17 AT+CLCK–Locking/Unlocking Module .................................................................................... 29
2.18 AT+CPWD–Modifying Password ............................................................................................ 31
2.19 AT+CGDCONT–Defining PDP Context .................................................................................. 32
2.20 AT+XGAUTH–PDP Authentication ......................................................................................... 33
2.21 AT+CGATT–Setting GPRS Attach and Detach ...................................................................... 34
2.22 ATD*99#–GPRS Dialing Command ........................................................................................ 36
2.23 AT+ENPWRSAVE–Enabling or Disabling Sleep Mode .......................................................... 36
2.24 ATE1/ATE0–Enabling & Disabling Terminal Display .............................................................. 37
2.25 AT+CNUM–Reading My Number ............................................................................................. 38
2.26 AT&W–Saving the Setting ...................................................................................................... 39
3 SMS Commands ..................................................................................... 40
3.1 AT+CSMS–Selecting SMS Services ........................................................................................ 40
3.2 AT+CPMS–Setting Preferred SMS Storage ............................................................................. 41
3.3 AT+CMGF–Setting SMS Inputting Mode .................................................................................. 42
3.4 AT+CSCS–Setting TE Character Set ....................................................................................... 43
N77 AT Commands Manual
Contents
Copyright © Neoway Technology Co., Ltd
iv
3.5 AT+CNMI–Setting SMS Indication Mode .................................................................................. 44
3.6 AT+CMGR–Reading SMS Messages ....................................................................................... 46
3.7 AT+CMGL – SMS Message List ................................................................................................ 48
3.8 AT+CMGS – Sending SMS Messages ...................................................................................... 51
3.9 AT+CMGW – Writing SMS Messages ....................................................................................... 52
3.10 AT+CMSS – Sending Messages from Storage ....................................................................... 53
3.11 AT+CMGD – Deleting SMS Messages .................................................................................... 54
3.12 AT+CSCA – Setting SMS Center Number .............................................................................. 55
3.13 AT+CSMP – Setting Text Mode Parameters ........................................................................... 56
3.14 AT+CSDH – Displaying the Parameters of the Text Mode ...................................................... 57
3.15 AT+CSAS–Saving the Setting ................................................................................................ 59
4 TCP/UDP Client Commands ................................................................... 60
4.1 AT+NETAPN–Setting Network APN ......................................................................................... 60
4.2 AT+XISP–Selecting Internal or External Protocol Stack .......................................................... 61
4.3 AT+XIIC–Setting Up a PPP Link ............................................................................................... 61
4.4 AT+TCPSETUP–Setting Up TCP Connection .......................................................................... 62
4.5 AT+TCPSEND–Sending TCP Data .......................................................................................... 64
4.6 AT+RECVMODE–Setting Receive Mode ................................................................................. 65
4.7 AT+TCPRECV–Unsolicited TCP Data Output .......................................................................... 66
4.8 +TCPREAD–Reading TCP Data .............................................................................................. 67
4.9 AT+TCPCLOSE–Closing TCP Connection .............................................................................. 68
4.10 AT+UDPSETUP–Setting Up UDP Connection ....................................................................... 68
4.11 AT+UDPSEND–Sending UDP Data ....................................................................................... 70
4.12 AT+UDPRECV–Unsolicited UDP Data Ouput ........................................................................ 71
4.13 AT+UDPREAD–Reading UDP Data ....................................................................................... 72
4.14 AT+UDPCLOSE–Closing UDP Connection ............................................................................ 73
4.15 AT+IPSTATUS–Querying TCP/UDP Socket Status ................................................................ 74
4.16 AT+TCPACK–Querying Status of Data Sent by TCP Socket ................................................. 75
5 TCP Server Commands ........................................................................... 77
5.1 AT+TCPLISTEN–Setting TCP Listening for the Server ............................................................ 77
5.2 AT+CLOSELISTEN–Closing Socket Connection ..................................................................... 78
5.3 AT+CLOSECLIENT–Closing Remote Socket ........................................................................... 79
5.4 AT+TCPRECV(S)–Unsolicited TCP Data Output ..................................................................... 79
5.5 AT+TCPREADS–Reading TCP Data ........................................................................................ 80
5.6 AT+TCPSENDS–Sending Data to Client .................................................................................. 81
5.7 AT+CLIENTSTATUS–Querying Client Connection Status ....................................................... 82
5.8 AT+TCPACK–Querying Status of Data Sent by TCP Server ................................................... 83
6 Transparent TCP/UDP Commands ......................................................... 85
6.1 AT+TCPTRANS–Setting Up Transparent TCP Connection ..................................................... 85
6.2 AT+UDPTRANS–Setting Up Transparent UDP Connection .................................................... 86
6.3 AT+TCPACK–Querying Status of Data Sent by Transparent TCP Socket ............................... 87
6.4 AT+IPSTATUS–Querying TCP/UDP Socket Status .................................................................. 88
6.5 AT+TRANSCLOSE–Closing Transparent Socket..................................................................... 89
N77 AT Commands Manual
Contents
Copyright © Neoway Technology Co., Ltd
v
7 Transparent TCP Server Commands ...................................................... 90
7.1 AT+TCPSRVTRANS–Setting Listening for Transparent TCP .................................................. 90
7.2 AT+CLIENTSTATUS–Querying Socket Status of Client ........................................................... 91
8 FTP Commands ...................................................................................... 93
8.1 AT+FTPLOGIN–Logging in to FTP Server ............................................................................... 93
8.2 AT+FTPLOGOUT–Logging Out from FTP Server ................................................................. 94
8.3 AT+FTPGET–Downloading Data from FTP Server .................................................................. 95
8.4 AT+FTPPUT–Uploading Data to FTP Server ........................................................................... 97
8.5 AT+FTPSTATUS–Querying FTP Link Status ............................................................................ 98
8.6 AT+FILEFTPGET–Downloading Files to File System .............................................................. 99
8.7 AT+FILEFTPPUT–Uploading Files in the File System ........................................................... 100
8.8 +FILEFTPSTAT–Reporting the FTP Result Status of the File System .................................. 101
9 HTTP/HTTPS Commands ..................................................................... 102
9.1 AT+HTTPPARA–Setting HTTP Parameters ........................................................................... 102
9.2 AT+HTTPSETUP–Setting Up HTTP Connection ................................................................... 103
9.3 AT+HTTPACTION – Executing HTTP Request ....................................................................... 104
9.4 AT+HTTPCLOSE–Closing an HTTP Socket .......................................................................... 107
9.5 +HTTPRECV–Unsolicited HTTP Data Output ........................................................................ 108
9.6 +HTTPCLOSED–HTTP Socket Closed .................................................................................. 109
9.7 AT+FILEHTTPACTION–Sending an HTTP Request in the File System ................................... 110
9.8 AT+FILEHTTPSTAT–Reporting the HTTP Result Status of the File System ............................ 111
9.9 AT+HTTPSCFG–Configuring SSL Parameters for HTTPS ..................................................... 112
9.10 AT+HTTPSPARA–Setting HTTPS Parameters ..................................................................... 113
9.11 AT+HTTPSSETUP–Setting up HTTPS Connection .............................................................. 114
9.12 AT+HTTPSACTION–Executing HTTPS Request .................................................................. 115
9.13 AT+HTTPSCLOSE–Closing HTTPS Socket ......................................................................... 117
9.14 AT+HTTPSRECV–Unsolicited HTTPS Data Output ............................................................. 118
9.15 AT+HTTPSGET–Donwnloading HTTPS File ......................................................................... 119
10 SSL TCP Data Service ........................................................................ 121
10.1 AT+SSLTCPCFG–Configuring SSL Parameters for TCP ..................................................... 121
10.2 AT+SSLTCPSETUP–Setting up TCP Connection over SSL ................................................ 122
10.3 AT+SSLTCPCLOSE–Closing TCP Connection over SSL .................................................... 124
10.4 AT+SSLTCPSEND–Sending TCP Data over SSL ................................................................ 125
10.5 AT+SSLTCPRECV–Unsolicited SSLTCP Data Output ......................................................... 126
10.6 AT+SSLTCPREAD–Reading SSLTCP Data ......................................................................... 126
10.7 AT+CERTADD–Writing SSL Certificate ................................................................................ 127
10.8 AT+CERTCHECK–Checking SSL Certificate ....................................................................... 128
10.9 AT+SSLTCPCFGA–Configuring SSL Parameters for TCP .................................................. 129
11 MQTT Commands ............................................................................... 131
11.1 AT+MQTTTLS–Configuring TLS Parameters ....................................................................... 131
11.2 AT+MQTTCONNPARAM–Setting User Parameters ............................................................ 132
11.3 AT+MQTTWILLPARAM–Will Settings .................................................................................. 133
N77 AT Commands Manual
Contents
Copyright © Neoway Technology Co., Ltd
vi
11.4 AT+MQTTWILLMSG–Setting Long Will Messages .............................................................. 134
11.5 AT+MQTTCONN–Connection Command ............................................................................. 135
11.6 AT+MQTTSUB–Subscription ................................................................................................ 135
11.7 AT+MQTTUNSUB–Unsubscription ....................................................................................... 136
11.8 AT+MQTTPUB–Publishing Topic .......................................................................................... 137
11.9 AT+MQTTPUBS–Publishing Topic ....................................................................................... 138
11.10 AT+MQTTDISCONN–Disconnecting to MQTT Server ....................................................... 139
11.11 AT+MQTTSUB–Receiving Topic Content ........................................................................... 139
11.12 AT+MQTTSTATE–Querying MQTT Connection Status: ..................................................... 140
12 GSM Location Command .................................................................... 142
12.1 AT+CIPGSMLOC–Obtaining the Location of the Module ..................................................... 142
13 ADC Command .................................................................................... 144
13.1 AT$MYADCTEMP–Querying Environment Temperature ..................................................... 144
14 Time Synchronization Commands ....................................................... 145
14.1 AT+UPDATETIME–Updating Time to Network ..................................................................... 145
15 Statistics on Data Traffic ...................................................................... 148
15.1 AT+FLOWCALC–Statistics on Total Data Traffic .................................................................. 148
15.2 AT+RATECALC–Statistics on Transient Traffic .................................................................... 149
16 File System Commands ...................................................................... 150
16.1 AT+FSWF–Writing Data to File ............................................................................................. 150
16.2 AT+FSRF–Reading Data from File ....................................................................................... 151
16.3 AT+FSDF–Deleting a File ..................................................................................................... 152
16.4 AT+FSLIST–Obtaining File List ............................................................................................ 153
16.5 AT+FSFS–Obtaining the Size of a File ................................................................................. 153
16.6 AT+FSLS–Obtaining the Remaining Storage Size of User Disk .......................................... 154
16.7 AT+FSFAT–Formatting User Disk ......................................................................................... 155
17 Network Sharing Commands ............................................................... 157
17.1 AT+NETSHAREACT–Enabling Network Sharing ................................................................. 157
18 Other AT Commands ........................................................................... 159
18.1 AT$MYPOWEROFF–Powering Off the Module ................................................................... 159
18.2 AT$MYSOCKETLED–Controlling the Indicator of Socket Status ......................................... 159
18.3 AT$MYGMR–Obtaining the Version Information of the Module ........................................... 160
18.4 AT$MYCCID–Obtaining the CCID of the SIM Card .............................................................. 161
18.5 AT$MYNETURC–Controlling Unsolicited Report ........................................................... 162
18.6 AT$MYTYPE–Querying the Type of the Module .................................................................. 163
18.7 AT$MYTYPE (Chongqing)–Querying the Type of the Module ............................................. 164
18.8 AT$MYMODEM (Standards for Canton)–Querying the Type of the Module ........................ 165
18.9 AT$MYNETCON–Setting Initialization Parameters of Network Connections....................... 166
18.10 AT$MYNETACT–Activating/Deactivating Network Connection .......................................... 167
18.11 AT$MYIPFILTER–Configuring IP Access ........................................................................... 168
18.12 AT$MYNETSRV–Setting Parameters for Non-transparent Transmission .......................... 169
N77 AT Commands Manual
Contents
Copyright © Neoway Technology Co., Ltd
vii
18.13 AT$MYNETOPEN–Enabling TCP/UDP Service ................................................................. 170
18.14 AT$MYNETREAD–Reading Received Data ....................................................................... 172
18.15 AT$MYNETWRITE–Sending Data ..................................................................................... 173
18.16 AT$MYNETCLOSE–Closing Socket Connection ............................................................... 173
18.17 AT$MYNETACK–Querying TCPACK Information ............................................................... 174
18.18 AT$MYNETACCEPT–Accepting the Listening Request ..................................................... 175
18.19 AT$MYNETCREATE–Enabling Transparent Transmission Service ................................... 176
18.20 AT$MYFTPOPEN–Starting FTP Service ............................................................................ 178
18.21 AT$MYFTPCLOSE–Closing FTP Service .......................................................................... 179
18.22 AT$MYFTPSIZE–Obtaining the FTP File Size ................................................................... 179
18.23 AT$MYFTPGET–Downloading FTP Files ........................................................................... 180
18.24 AT$MYFTPPUT–Uploading Files to FTP Server ................................................................ 181
18.25 $MYURCREAD–Indicating Data Receiving ....................................................................... 182
18.26 $MYURCCLOSE–Indicating the Disconnection ................................................................. 183
18.27 $MYURCACT–Indicating Network Connection Status ....................................................... 184
18.28 $MYURCCLIENT–Indicating Client Connection ................................................................. 184
18.29 $MYURCFTP–Indicating FTP Disconnection ..................................................................... 185
18.30 AT$MYBCCH–Locking BCCH Channel .............................................................................. 186
18.31 AT$MYBAND–Locking GSM Band ..................................................................................... 188
18.32 AT$MYLACID–Querying Current LAC and CELL_ID ......................................................... 188
18.33 AT$MYCGED–Querying Current Channel, RX Power and TX Power ............................... 189
18.34 AT$MYSYSINFO–Querying or Locking the Network Mode ............................................... 190
18.35 AT$MYSYSINFOURC–Enabling/Disabling Network Mode Report .................................... 191
18.36 AT$MYURCSYSINFO–Enabling/Disabling Network Mode Report .................................... 192
18.37 $MYURCSYSINFO–Enabling/Disabling Network Mode Report ........................................ 193
18.38 AT$MYNETINFO (Standards for Canton)–Setting Network Mode Choices ....................... 194
18.39 AT$MYNETAUTO–Enabling/Disabling the Default AUTO Network Modes during Startup 195
18.40 AT^SYSCONFIG–Setting Network Mode Choices ............................................................. 196
18.41 AT^SYSINFO–Obtaining System Information .................................................................... 197
18.42 AT$MYTIMEUPDATE–Network Time Update .................................................................... 199
18.43 AT+NRSP–Querying RSRP, RSRQ, SINR of Cells in a Neighbor of a Serving Cell on LTE
Network .......................................................................................................................................... 201
18.44 AT$MYANTAUX–Controlling Divergent Antenna ................................................................ 201
18.45 AT+NETMSG–Querying Network Registration Information ................................................ 202
18.46 AT+NETMSG–Querying Network Registration Information ................................................ 204
18.47 AT+NETDMSG–Querying Network Registration Information ............................................. 206
18.48 AT+NEOFOTA–FOTA Command ....................................................................................... 209
18.49 AT+MYDATAONLY–Disabling CS Services ......................................................................... 211
18.50 AT+BANDLOCK–Locking to Band ....................................................................................... 211
18.51 AT$MYUSBNETADDR–Setting RNDIS Gateway ............................................................... 213
18.52 AT+SIMSTATUS–Obtaining Key Parameters of the SIM Card .......................................... 214
18.53 AT$MYNETDTS–Collecting Traffic Statistics...................................................................... 214
18.54 AT+DNSSERVER–Setting the DNS Server ....................................................................... 216
N77 AT Commands Manual
Contents
Copyright © Neoway Technology Co., Ltd
viii
18.55 AT+USBSTATE–Controlling the USB Status Unsolicited Report ....................................... 217
18.56 +USBSTATEURC–Reporting USB Connection Status ...................................................... 218
18.57 AT+READADC–Reading ADC Value .................................................................................. 218
Error code .............................................................................................. 220
Reference Process of AT Command Programming .............................. 221
B.1 Content of PDU SMS Messages ............................................................................................. 221
B.2 Flowchart of Sending Text SMS Messages (Through UART) ................................................. 223
B.3 Flowchart of Sending PDU SMS Messages (Through UART) ................................................ 224
Support Band List ................................................................................. 225
C.1 GSM Bands ............................................................................................................................. 225
C.2 LTE Bands ............................................................................................................................... 225
N77 AT Commands Manual
About This Document
Copyright © Neoway Technology Co., Ltd
ix
About This Document
Scope
This document is applicable to N77.
Audience
This document is intended for system engineers (SEs), development engineers, and test engineers.
Change History
Issue
Date
Change
Changed By
1.0
2020-9
Initial draft
Song Haiqing
N77 AT Commands Manual
About This Document
Copyright © Neoway Technology Co., Ltd
x
Conventions
Symbol
Indication
This warning symbol means danger. You are in a situation that could cause fatal
device damage or even bodily damage.
Means reader be careful. In this situation, you might perform an action that could
result in module or product damages.
Means note or tips for readers to use the module
Related Documents
Neoway_N77_Datasheet
Neoway_N77_Product_Specifications
Neoway_N77_HW_User_Guide
Neoway_N77_EVK_User_Guide
N77 AT Commands Manual
Boot LOG Instruction
Copyright © Neoway Technology Co., Ltd
11
Boot LOG Instruction
The UART outputs +PBREADY after the phonebook is available.
If the module is booted in automatic baudrate detection mode, send AT 10 seconds after the module
is powered up to check if the AT function is initialized. The UART responds with OK if AT is initialized
and outputs +PBREADY after the phonebook is available.
Network indicator status
⚫ Off: No network found.
⚫ On: the module finds a network and the PDP context is not activated.
⚫ Blinks (on for 0.2 seconds and off for 1.8 seconds): the PDP context is activated successfully.
N77 AT Commands Manual
Chapter 1 AT Syntax
Copyright © Neoway Technology Co., Ltd
12
1 AT Syntax
1.1 Symbols
⚫ <CR>: carriage return character
⚫ <LF>: linefeed character
⚫ <..>: parameter name, the angle brackets do not appear in the command line.
⚫ [..]: optional parameter, the square brackets do not appear in the command line.
⚫ : space
1.2 Description
Prefix
AT or at
Command Line
Standard commands, in compliance with 3GPP 27007, 27005and ITU-T Recommendation V.250.
Extended commands, defined by Neoway
Joint Mark
+ or $, used between the prefix and a command line
Termination Character
<CR>, i.e. 0x0D
Response Syntax
<CR><LF>response<CR><LF>
N77 AT Commands Manual
Chapter 1 AT Syntax
Copyright © Neoway Technology Co., Ltd
13
Response can be one or multiple messages.
Result Syntax
<CR><LF>OK<CR><LF> indicates that a command is executed successfully.
<CR><LF>ERROR<CR><LF> indicates that a command fails to be executed.
For the error codes, see Appendix A.
1.3 Command Types
Type
Syntax
Response
Function
Set
AT+CMD=<VALUE><CR>
<CR><LF>OK<CR><LF>
Or
<CR><LF>ERROR<CR><LF>
Store a value or
values for later use
Execute
AT+CMD[=<VALUE>]<CR>
[<CR><LF>response]
<CR><LF>OK<CR><LF>
Or
<CR><LF>ERROR<CR><LF>
Invoke a function of
the module.
Test
AT+CMD=?<CR>
[<CR><LF>response]
<CR><LF>OK<CR><LF>
Determine the range
of parameter values
or parameter lengths
that are supported
Query
AT+CMD?<CR>
[<CR><LF>response]
<CR><LF>OK<CR><LF>
Determine the current
value or values stored
Unsolicited
report
<CR><LF>+CMD:
<VALUE><CR><LF>
N/A
Report the status
change and data
receiving
Remarks
Symbols are not displayed in AT commands. All commands comply with the rules in
this chapter.
N77 AT Commands Manual
Chapter 2 General Commands
Copyright © Neoway Technology Co., Ltd
14
2 General Commands
2.1 ATI–Querying Manufacturer Information
To query the manufacturer information, including manufacturer, model, and version
Format
Type
Command
Response
Execute
ATI<CR>
<CR><LF><module_info>
<CR><LF>OK<CR><LF>
Timeout
The command times out if the module does not respond in 300 ms.
Parameter
<module_info>
module manufacturer information
Example
ATI
NEOWAY
N77
REVISION V001
OK
Manufacturer
Module model
Version
2.2 AT+CGMR–Querying Software Version
To query the software version
N77 AT Commands Manual
Chapter 2 General Commands
Copyright © Neoway Technology Co., Ltd
15
Format
Type
Command
Response
Execute
AT+GMR<CR>
<CR><LF>+GMR: <reversion>
<CR><LF>OK<CR><LF>
Timeout
The command times out if the module does not respond in 300 ms.
Parameter
<reversion>
software version
Example
AT+GMR
+GMR: N77_BZ-NWY-001
OK
Query the software version
2.3 AT+CSQ–Querying Signal Quality
To query the receiving signal strength indication (RSSI) and bit error rate (BER) of the channel.
Format
Type
Command
Response
Execute
AT+CSQ<CR>
<CR><LF>+CSQ: <signal>,<ber>
<CR><LF>OK<CR><LF>
Timeout
The command times out if the module does not respond in 300ms.
Parameter
<signal>
The following table shows the relationship between the CSQ and the RSSI.
N77 AT Commands Manual
Chapter 2 General Commands
Copyright © Neoway Technology Co., Ltd
16
signal
Rssi
0
<4 or 99
<-107 dBm or unknown
1
<10
<-93dBm
2
<16
<-71 dBm
3
<22
<-69 dBm
4
<28
<-57 dBm
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 strength of the current signal.
2.4 AT+CREG–Querying Network Registration Status
To query the network registration status of the module
Format
Type
Command
Response
Execute
AT+CREG=[<n>]<CR>
<CR><LF>OK<CR><LF>
Or
<CR><LF>ERROR<CR><LF>
Or
<CR><LF>+CREG:<stat>
Query
AT+CREG?<CR>
<CR><LF>+CREG:
<n><stat>[,<lac>,<ci>[,<Act>]]<CR><LF>
<CR><LF>OK<CR><LF>
Test
AT+CREG=?<CR>
<CR><LF>+CREG: (list of supported <n>s)
<CR><LF>OK<CR><LF>
N77 AT Commands Manual
Chapter 2 General Commands
Copyright © Neoway Technology Co., Ltd
17
Timeout
The command times out if the module does not respond in 300ms.
Parameter
<n>
Specifies whether to enable unsolicited result codes for network registration.
0: disable network registration unsolicited result code (default).
1: enable network registration unsolicited result code +CREG: <stat>.
2: enable network registration unsolicited result code with location information (Cell ID,
Local ID) +CREG: <stat>[,[<lac>],[<ci>],[<AcT>]]
<stat>
Network registration status
0: not registered, the module is not currently searching for an operator to register to
1: registered with a home network
2: not registered, but the module is currently trying to attach or searching for an operator to
register to
3: registration denied
4. unknown code
5: registered, roaming
<lac>
Two-byte location area code in hexadecimal format, string type
<ci>
Four-byte cell ID in hexadecimal format, string type
<Act>
The access technology of the serving cell, integer type
0: GSM
1: GSM compact
2: UTRAN
3: GSM w/EGPRS
4: UTRAN w/HSDPA
5: UTRAN w/HSUPA
6: UTRAN w/HSDPA and w/HSUPA
7: E-UTRAN
Example
AT+CREG?
+CREG: 0,1
OK
Query the network registration status of the
module
The module is registered with a home network
AT+CREG=1
OK
Enable network registration unsolicited codes.
AT+CREG=?
+CREG: (0-2)
OK
Query the value range of the network
registration status parameter.
N77 AT Commands Manual
Chapter 2 General Commands
Copyright © Neoway Technology Co., Ltd
18
2.5 AT+CEREG–Querying EPS Network Registration
Status
To query the EPS network registration status of the module
Format
Type
Command
Response
Execute
AT+CEREG=<n><CR>
<CR><LF>OK<CR><LF>
Query
AT+CEREG?<CR>
<CR><LF>+CEREG:
<stat>[,[<tac>],[<ci>],[<AcT>][,,[,[<Active-
Time>],[<Periodic-TAU>]]]]
<CR><LF>OK<CR><LF>
Test
AT+CEREG=?<CR>
<CR><LF>+CEREG: (list of supported<n>s)
<CR><LF>OK<CR><LF>
Timeout
The command times out if the module does not respond in 300ms.
Parameter
<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 (Cell ID, Local ID) unsolicited
result code
<stat>
Network status
0: not registered, the module is not currently searching for a new operator to register
1: registered to the home network
2: not registered, but the module is currently trying to searching for a base station
3: registration denied
4. Unknown code
5: registered, roaming
<lac>
Two-byte tracking area code in hexadecimal format, string type
<ci>
Four-byte cell ID in hexadecimal format, string type
<Act>
the access technology of the serving cell, integer type
0: GSM
1: GSM compact
2: UTRAN
N77 AT Commands Manual
Chapter 2 General Commands
Copyright © Neoway Technology Co., Ltd
19
3: GSM w/EGPRS
4: UTRAN w/HSDPA
5: UTRAN w/HSUPA
6: UTRAN w/HSDPA and HSUPA
7: E-UTRAN
Example
AT+CEREG?
+CEREG: 0,1
OK
Query the network registration status of the module.
AT+CEREG=1
OK
Enable network registration unsolicited code.
AT+CEREG=?
+CEREG: (0-2)
OK
Query the value range of the network registration status
parameter.
2.6 AT+COPS–Selecting and Registering Network
To select and register a network.
Format
Type
Command
Response
Execute
AT+COPS=[<mode>[,<format>[,<oper>
>[,<AcT>]]]]<CR>
<CR><LF>+GMR: <reversion>
<CR><LF>OK<CR><LF>
Query
AT+COPS?<CR>
<CR><LF>+COPS:<mode>[,<format>,<op
er>[,<AcT>]]
Test
AT+COPS=?<CR>
<CR><LF>+COPS: [list of supported
(<stat>,long alphanumeric <oper>,short
alphanumeric <oper>,numeric
<oper>[,<AcT>])s][,,(list of
supported<mode>s),(list of supported
<format>s)]<CR><LF>
<CR><LF>OK<CR><LF>
Timeout
The command times out if the module does not respond in 300 ms.
N77 AT Commands Manual
Chapter 2 General Commands
Copyright © Neoway Technology Co., Ltd
20
Parameter
<mode>
To set automatic network selection or manual selection:
0: Automatic selection (ignore the parameter <per>)
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
3: GSM w/EGPRS
4: UTRAN w/HSDPA
5: UTRAN w/HSUPA
6: UTRAN w/HSDPA and HSUPA
7: E-UTRAN
Example
AT+COPS=0,0
OK
Automatic network selection is enabled. Long alphanumeric
mode.
AT+COPS=0,2
OK
Set to digital mode
AT+COPS?
+COPS: 0,0,"CHINAMOBILE",7
OK
China Mobile
AT+COPS?
+COPS: 0,2,"46000",7
OK
If it is set to digital mode, get the number 46000
AT+COPS?
+COPS: 0,0,"CHINAUNICOM",7
OK
China Unicom
AT+COPS?
+COPS: 0,2,"46001",7
OK
If it is set to digital mode, then get the number 46001.
AT+COPS=2
OK
Deregister the network.
2.7 AT+CIMI–Querying IMSI
To query the international mobile subscriber identification (IMSI).
/
