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HUAWEI ME909u-521 LTE LGA Module

Application Guide

Issue

Date

2013-07-05

Huawei Technologies Co., Ltd. provides customers with comprehensive technical support and service. For
any assistance, please contact our local office or company headquarters.

Huawei Technologies Co., Ltd.
Huawei Industrial Base, Bantian, Longgang, Shenzhen 518129, People’s Republic of China
Tel: +86-755-28780808 Global Hotline: +86-755-28560808 Website: www.huawei.com
E-mail: mobile@huawei.com
Please refer color and shape to product. Huawei reserves the right to make changes or improvements to any
of the products without prior notice.

Copyright © Huawei Technologies Co., Ltd. 2013. 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 Huawei Technologies Co., Ltd.
The product described in this manual may include copyrighted software of Huawei Technologies Co., Ltd and
possible licensors. Customers shall not in any manner reproduce, distribute, modify, decompile, disassemble,
decrypt, extract, reverse engineer, lease, assign, or sublicense the said software, unless such restrictions
are prohibited by applicable laws or such actions are approved by respective copyright holders under
licenses.

Trademarks and Permissions
,
, and
are trademarks or registered trademarks of Huawei Technologies Co., Ltd.
Other trademarks, product, service and company names mentioned are the property of their respective
owners.

Notice
Some features of the product and its accessories described herein rely on the software installed, capacities
and settings of local network, and may not be activated or may be limited by local network operators or
network service providers, thus the descriptions herein may not exactly match the product or its accessories
you purchase.
Huawei Technologies Co., Ltd reserves the right to change or modify any information or specifications
contained in this manual without prior notice or obligation.

NO WARRANTY
THE CONTENTS OF THIS MANUAL ARE PROVIDED "AS IS". EXCEPT AS REQUIRED BY APPLICABLE
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HUAWEI ME909u-521 LTE LGA Module
Application Guide

About This Document

About This Document
Revision History
Document
Version

Date

2013-07-05

Issue 01 (2013-07-05)

Chapter

Description
Creation

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Contents

Contents
1 Overview......................................................................................................................................... 7
1.1 Conventions and Definitions ............................................................................................................ 7
1.1.1 Conventions ............................................................................................................................. 7
1.1.2 Definitions ................................................................................................................................ 7
1.2 Organization of This Document ........................................................................................................ 8
1.3 Basic AT Command Processing Principles ...................................................................................... 9
1.3.1 Ports ........................................................................................................................................ 9
1.3.2 AT Command Processing Mechanism..................................................................................... 9
1.3.3 Recommended Timeout Mechanism for AT Commands Processed by a Host..................... 12

2 Initialization Application Scenarios ....................................................................................... 14
2.1 Startup Indication ^SYSSTART ...................................................................................................... 14
2.1.1 Reference Process ................................................................................................................ 14
2.1.2 Troubleshooting ..................................................................................................................... 14
2.2 Querying Basic Information ............................................................................................................ 15
2.2.1 Reference Process ................................................................................................................ 15
2.2.2 Troubleshooting ..................................................................................................................... 15
2.3 Network Service Operations .......................................................................................................... 16
2.3.1 Reference Process ................................................................................................................ 16
2.3.2 Troubleshooting ..................................................................................................................... 17

3 Network Searching and Registration Application Scenarios............................................. 18
3.1 Searching and Registering Network............................................................................................... 18
3.1.1 Reference Process ................................................................................................................ 18
3.1.2 Troubleshooting ..................................................................................................................... 20

4 ECM Application Scenarios ...................................................................................................... 21
4.1 ECM Dialing ................................................................................................................................... 21
4.1.1 Reference Process ................................................................................................................ 21
4.1.2 Troubleshooting ..................................................................................................................... 22
4.2 Querying the Dial-up Connection State .......................................................................................... 22
4.2.1 Reference Process ................................................................................................................ 22
4.2.2 Troubleshooting ..................................................................................................................... 23
4.3 Disconnecting the Dial-up Connection ........................................................................................... 23
4.3.1 Reference Process ................................................................................................................ 23

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4.3.2 Troubleshooting ..................................................................................................................... 23

5 SMS Application Scenarios ...................................................................................................... 24
5.1 Overview ........................................................................................................................................ 24
5.2 Initializing SMS ............................................................................................................................... 26
5.2.1 Reference Process ................................................................................................................ 26
5.2.2 Troubleshooting ..................................................................................................................... 29
5.3 Sending Short Message ................................................................................................................. 29
5.3.1 Reference Process ................................................................................................................ 29
5.3.2 Troubleshooting ..................................................................................................................... 31
5.4 Reading Short Messages ............................................................................................................... 32
5.4.1 Reference Process ................................................................................................................ 32
5.4.2 Troubleshooting ..................................................................................................................... 34
5.5 Deleting Short Messages ............................................................................................................... 34
5.5.1 Reference Process ................................................................................................................ 34
5.5.2 Troubleshooting ..................................................................................................................... 35

6 Phonebook Application Scenarios .......................................................................................... 36
6.1 Overview ........................................................................................................................................ 36
6.2 Memory Operations ........................................................................................................................ 36
6.2.1 Reference Process ................................................................................................................ 36
6.2.2 Troubleshooting ..................................................................................................................... 37
6.3 Reading Phonebook Entries .......................................................................................................... 38
6.3.1 Reference Process ................................................................................................................ 38
6.3.2 Troubleshooting ..................................................................................................................... 39
6.3.3 Writing/Deleting Phonebook Entries ...................................................................................... 40
6.3.4 Reference Process ................................................................................................................ 40
6.3.5 Troubleshooting ..................................................................................................................... 41
6.4 Searching for Phonebook Entries .................................................................................................. 42
6.4.1 Reference Process ................................................................................................................ 42
6.4.2 Troubleshooting ..................................................................................................................... 43
6.5 Querying User Number .................................................................................................................. 43
6.5.1 Reference Process ................................................................................................................ 43
6.5.2 Troubleshooting ..................................................................................................................... 44
6.6 Setting the TE's Character Sets ..................................................................................................... 44
6.6.1 Reference Process ................................................................................................................ 44
6.6.2 Troubleshooting ..................................................................................................................... 45

7 SIM Operation Application Scenarios .................................................................................... 46
7.1 PIN Operations ............................................................................................................................... 46
7.1.1 Reference Process ................................................................................................................ 46
7.1.2 Troubleshooting ..................................................................................................................... 47
7.2 CRSM Command ........................................................................................................................... 48
7.2.1 Reference Process ................................................................................................................ 48

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7.2.2 Troubleshooting ..................................................................................................................... 50

8 Sleeping and Waking Up Application Scenarios ................................................................. 51
8.1 Hardware Interfaces ....................................................................................................................... 52
8.2 Sequence Diagram......................................................................................................................... 53
8.3 Software Interfaces ........................................................................................................................ 54
8.3.1 Principle ................................................................................................................................. 54
8.3.2 USB and Sleep ...................................................................................................................... 56
8.3.3 UART and Sleep .................................................................................................................... 57
8.3.4 Module Wake-up.................................................................................................................... 57
8.3.5 Host Woken up by Module .................................................................................................... 57
8.4 Application Scenarios: System with USB Connection only ............................................................ 59
8.4.1 Hardware Connection ............................................................................................................ 59
8.4.2 Software Procedure ............................................................................................................... 59
8.4.3 Advantages ............................................................................................................................ 60
8.5 Application Scenarios: System with USB and WAKEUP_OUT...................................................... 60
8.5.1 Hardware Connection ............................................................................................................ 60
8.5.2 Software Procedure ............................................................................................................... 60
8.5.3 Advantages ............................................................................................................................ 61
8.6 System with Other Connection Methods ........................................................................................ 61

9 Thermal Protection Application Scenarios ............................................................................ 62
9.1 Pre-configuration ............................................................................................................................ 62
9.1.1 Troubleshooting ..................................................................................................................... 62
9.2 Thermal Protection Process ........................................................................................................... 62

10 Module Powering Off and Resetting Application Scenarios ........................................... 64
10.1 Restarting the ME......................................................................................................................... 64
10.1.1 Reference Process .............................................................................................................. 64
10.1.2 Troubleshooting ................................................................................................................... 64
10.2 Power Off ME ............................................................................................................................... 64
10.2.1 Reference Process .............................................................................................................. 64
10.2.2 Troubleshooting ................................................................................................................... 65

11 Appendix .................................................................................................................................... 66
11.1 Relative Documents ..................................................................................................................... 66
11.2 Acronyms and Abbreviations ........................................................................................................ 66

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Overview

This document is intended to provide references for customers to choose appropriate
command sequences to start using the ME909u-521 module in a faster manner. This
document also contains examples and relevant description.
This document will be updated based on customers' requirements.

1.1 Conventions and Definitions
1.1.1 Conventions
Convention

Description

<…>

Value range of AT command parameters

XXXX

Personal Identification Number (PIN), Personal Unlock Key
(PUK), or password

1.1.2 Definitions
Term

Definition

Connected

Indicates that a link has been set up between two
modules or a module and a terminal.

Registered

Indicates that the module is registered with a
LTE/UMTS/GSM network.

Module

HUAWEI LTE module

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Mobile equipment

Application

network

1.2 Organization of This Document
Chapter

Description

Chapter 1 Overview

Describes the contents and organization of this
document

Chapter 2 Initialization
Application Scenarios

Describes scenarios for initialization

Chapter 3 Network Searching
and Registration Application
Scenarios

Describes scenarios for network searching and
registration

Chapter 4 ECM Application
Scenarios

Describes scenarios for ECM

Chapter 5 SMS Application
Scenarios

Describes scenarios for the text message

Chapter 6 Phonebook
Application Scenarios

Describes scenarios for phonebook

Chapter 7 SIM Operation
Application Scenarios

Describes scenarios for PIN management

Chapter 8 Sleeping and Waking
Up Application Scenarios

Describes scenarios for power management

Chapter 9 Thermal Protection
Application Scenarios

Describes scenarios for thermal protection

Chapter 10 Module Powering Off
and Resetting Application
Scenarios

Describes scenarios for powering off and
restarting

Chapter11 Appendix

Appendix

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Overview

1.3 Basic AT Command Processing Principles
1.3.1 Ports
The ME909u-521 module provides three ports to interact with its host:


MODEM port: simulated using USB, for AT command interaction and
establishing data connection.
Port name: HUAWEI Mobile Connect-3G Modem



PCUI port: simulated using USB, for AT command interaction only.
Port name: HUAWEI Mobile Connect-3G PCUI Interface



ECM port: simulated using USB, for establishing communication connection.
Port name: CDC Ethernet Control Model (ECM)

The ME909u-521 also provides a port for debugging:


DIAG port: Simulated using USB, for DIAG (diagnostic) command interaction
(mainly used to debug modules at present).
Port name: HUAWEI Mobile Connect-3G Application Interface

A host controls a module using AT commands. If AT commands are unavailable, a
module can be deemed as unavailable.

1.3.2 AT Command Processing Mechanism
A module processes AT commands from the ports (MODEM, PCUI) in series. An AT
command can be processed when and only when the previous AT command
processing has been completed. If the module is processing an AT command, a new
AT command from the same port will be ignored and other commands from other
ports will be buffered until the current AT command is processed.
This rule also applies to COM ports converted from USB ports.
The processing of an AT command starts when the AT command is entered from the
TE, and ends when the UE (the module) returns all the results in response the
command.

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Figure 1-1 AT command processing sequence diagram

AT command 1
Process AT
command 1
AT command 2
Ignore AT
command 2
Return results of AT command 1

AT command 3
Process AT
command 3
Return results of AT command 3

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Example:
AT +CPIN ?
+CPIN : READY

OK
AT +CMGL =4
+CMGL : 0,3,,19
07813108608805
+CMGL : 1,2,,18
07813108608805
+CMGL : 2,2,,18
07813108608805
+CMGL : 3,2,,28
07813108608805
D36CBC 168
+CMGL : 4,2,,24
07813108608805
1A
+CMGL : 5,2,,22
07813108608805
+CMGL : 6,2,,22
07813108608805

All AT commands entered during
this period of time will be
ignored.

F911320 B813109730116 F20000 A705B3D84C4603
F931FF0B813109730155 F30000 A704F4F29C0E
F931FF0B813109730155 F30000 A704F4F29C0E

All AT commands entered
F931FF0B813109730155
F30000
A71061 of
F69CAC
2EBF 69B5FA 4
during
this period
time will

be ignored.
F931FF0B813109730155 F30000 A70BB 05C2D5DB 7C1D4ECB 4

F931FF0B813109730155 F30000 A7096 E333 B8DCBE 77079

F931FF0B813109730155 F30000 A70930598 D26A7DBDF 68

Some special AT commands can be aborted by new AT commands. Such special
commands are called abortive commands.
The ME909u-521 supports the following abortive AT commands:


The AT+COPS Set command



AT+CLCK

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Example:

AT+COPS=1,2,23415
OK

Before the results ofAT+COPS
is returned, enter any characters
(such as "AT"), the module will
terminate the processing of
AT+COPS and return OK. The
entered characters are used to
abort the command only .

Some commands can be executed when SIM card is inserted. It would return to SIM
failure if SIM card is not inserted. For more information, see Property Description of
related AT in HUAWEI ME909u-521 LTE LGA Module AT Command Interface Specification.

Example:
AT+CREG?
+CME ERROR: SIM failure

Note:
SIM failure indicate that SIM card is not inserted.

1.3.3 Recommended Timeout Mechanism for AT Commands
Processed by a Host
A module processes AT commands in series. Do not send another AT command
before the result for the current command is returned or the current command times
out (except when the current command is an abortive AT command). The following
table lists AT command timeout durations (starting from the time when an AT
command arrives at a port).
Table 1-1 AT command timeout duration
AT Command

Timeout Duration

General AT commands

30s

AT+CMSS/AT+CMGS (used to send text
messages)

60s

AT+COPS=? (used to search for networks)

120s

After an AT command times out, it is recommended that the host check whether the
module is functioning normally. The following procedure is provided for your
reference:
1.

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The host sends AT to the module.

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If the module returns failure information, go to step 5.

If the module returns success information, the module is functioning normally.

If the host times out (the host waits for a response for over 30 seconds) three
times when waiting for the response from the module, go to step 5. Otherwise go
to step 1.

The host deems that the current module does not exist or is unavailable. Close
the port, stop sending all AT commands, exit the procedure to determine
whether the module is normal, and re-search for modules.

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Initialization Application Scenarios

2.1 Startup Indication ^SYSSTART
2.1.1 Reference Process
Command

Description
A module, without solicitation, presents ^SYSSTART to
its host to indicate that the module is starting.

^SYSSTART

Indicate that a module is starting.

Notes:


^SYSSTART is presented only when a module is starting and will not be presented after a
module has started.



^SYSSTART is presented only after the radio frequency (RF) initialization completes and
will not be presented in offline mode.

2.1.2 Troubleshooting
Scenario

Possible Error
Information

Solution

The module presents
^SYSSTART during startup.
After that, the module
presents ^SYSSTART again.

Indicate that the
module has been
reset.

If ^SYSSTART is presented
repeatedly, send the module
to the specified repair center.

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Initialization Application Scenarios

2.2 Querying Basic Information
2.2.1 Reference Process
Command

Description

AT+GMR/CGMR

Query software version.

Software version

Software version. e.g. 11.103.03.00.00

OK
AT+GMI/CGMI

Query manufacturer identification.

Manufacturer
Identification

For example: Huawei Technologies Co., Ltd.

OK
AT+GMM/CGMM

Query model identification.

Model identification

For example: ME909u-521

OK
AT+GSN/CGSN

Query product IMEI.

IMEI

For example: 865261010004010

Note:
The previously listed commands are Query commands and cannot be used to configure
settings.

2.2.2 Troubleshooting
Scenario

AT+GSN/CGSN

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Possible Error
Information

Solution

+CME ERROR: memory
failure

This error occurs when a
module's IMEI is not specified.
This problem is solved after
the IMEI is written into the
module.

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Initialization Application Scenarios

2.3 Network Service Operations
2.3.1 Reference Process
Command

Description

AT+CFUN?

Query a module's current mode. 1 indicates online
mode.

+CFUN: 1
OK
Query whether a module's SIM card is password
protected. READY indicates that the SIM card is
ready.

AT+CPIN?

+CPIN: READY
OK
AT^HCSQ?

Query the network signal quality.

^HCSQ:
"WCDMA",30,30,58
OK
AT+COPS?

Return the current network selection mode,
information about the operator with which the
module is registered, and the wireless access
standard.

+COPS: "Network status
information"

For example: +COPS: 1,0, "China Mobile Com"

OK
AT+COPS=0

Automatically search for networks.

OK
AT+CREG?

Query the state of the currently registered network.

+CREG: 0,1
OK
AT+CREG=1

Set the +CREG unsolicited indication.

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Initialization Application Scenarios

2.3.2 Troubleshooting
Scenario

Possible Error Information

Solution

AT+COPS?

+CME ERROR: SIM failure

No SIM card is detected. Insert
a SIM card.

AT+CREG?

+CME ERROR: SIM failure

No SIM card is detected. Insert
a SIM card.

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Network Searching and Registration Application
Scenarios

Network Searching and Registration
Application Scenarios

3.1 Searching and Registering Network
3.1.1 Reference Process
Command

Description

AT+COPS=0

Enable automatic search for networks.

OK
AT+COPS=1,2,"46000"

Manual search for the appointed network.

OK
Search for all networks, and return the
networks.

AT+COPS=?
OK

Enable the unsolicited indication when
network registration state changes.

AT+CREG=2
OK
AT^SYSCFGEX="00",3FFFFFFF
,1,2,7FFFFFFFFFFFFFFF,,

Set the system mode, network access order,
frequency band, roaming support, domain,
and other features.

OK
AT^SYSINFOEX

Query the system service state, domain,
roaming status, and system mode.

^SYSINFOEX:
2,3,0,1,,1,"GSM",3,"EDGE"
OK
AT^HCSQ?

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Query the signal quality.

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Command

Network Searching and Registration Application
Scenarios

Description

^HCSQ:"GSM",73
OK

Figure 3-1 Automatic search for networks
Automatic search for networks

Start

Enable automatic
search for networks.
AT+COPS=0

Return OK

The unsolication command
^SRVST indication for
the change of network state.

End

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Network Searching and Registration Application
Scenarios

Figure 3-2 Manual search for networks
Manual search for networks

Start

Enable automatic
search for networks.
AT+COPS=?

Display the
networks found.

Select and register with a network.
AT+COPS=1[,[,[,]]]

End

3.1.2 Troubleshooting
Scenario

Possible Error
Information

Solution

AT+COPS?

+CME ERROR: SIM
failure

No SIM card is detected. Insert
a SIM card.

AT+CREG?

+CME ERROR: SIM
failure

No SIM card is detected. Insert
a SIM card.

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ECM Application Scenarios

4.1 ECM Dialing
4.1.1 Reference Process
Command

Description

AT^NDISDUP=?

Check the parameter range supported by
the command.

^NDISDUP: (1-16),(0-1)
OK
AT^NDISDUP=1,1,"1234"

Set up a dial-up connection using the
APN provided by the network server.

The command is successfully executed.

^NDISSTAT: 1,,,"IPV4"

Report the dial-up connection state.

AT^NDISDUP=1,1,"4321","huawei",
"huawei",1

Set up a dial-up connection using the
account, password, and authentication
mode provided by the network server.

The command is successfully executed.

^NDISSTAT: 1,,,"IPV4"

Report the dial-up connection state.

The process of obtaining the IP address:
1.

After the dial-up is successful, the module will establish the DHCP service
automatically.

The PC driver will get the dial-up state and send net_ready state to the network
manage.

The network manage sends the DHCP service discover.

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ECM Application Scenarios

The module responses the service discover, and then sends the IP and DNS
address which is obtained from the PDP active process to the network managing
device.

4.1.2 Troubleshooting
Scenario

Possible Error Information

Solution

AT^NDISDUP=1,1,"1234
"

+CME ERROR: SIM failure

No SIM card is
detected. Insert a SIM
card.
NDISEND indicates the
failure reason during the
dial-up.

OK
AT^NDISDUP=1,1,"4321
","huaei","huawei",1

^NDISSTAT: 0,33,,"IPV4"
^NDISEND:1,29

AT^NDISDUP=1,1,"abcd
"

29 indicates that the
authenticated
information is not
correct.

NDISEND indicates the
failure reason during the
dial-up.

^NDISSTAT: 0,33,,"IPV4"

33 indicates that request
service is not specified.

^NDISEND:1,33

In this case, the network
don not support this
APN "abcd".

4.2 Querying the Dial-up Connection State
4.2.1 Reference Process
Command

Description

AT^NDISSTATQRY?

Query the dial-up connection state.

^NDISSTATQRY: 0,0,,IPV4

Report that the connection is not set up.

OK
AT^NDISSTATQRY?

Query the dial-up connection state.

^NDISSTATQRY: 1,,,IPV4

Report that the connection is set up.

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ECM Application Scenarios

4.2.2 Troubleshooting
None

4.3 Disconnecting the Dial-up Connection
4.3.1 Reference Process
Command

Description

AT^NDISDUP=1,0

Disconnect the dial-up connection.

The command is successfully executed.

^NDISSTAT:0,,,"IPV4"

IPv4 changes from the connected state to
the disconnected state.

4.3.2 Troubleshooting
None

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SMS Application Scenarios

5.1 Overview
Short Message Service (SMS) is a text messaging service using a service center(SC)
to transfer short text messages between GSM MEs and Short Message Entities
(SMEs). ME909u-521 only supports protocol data unit (PDU) mode message.
A message must contain the following information before it is sent:
For a PDU mode message:


Length of TPDU package



Message content: To compose or send a PDU mode message, the message
must contain all the message attributes and be encoded in PDU format. A PDU
consists of the following:
−

Service Center Address (SCA): composed of the address length, SCA type
and SCA reverse byte.

−

First octet: contains the message type indicator, TP-RP, TP-UDHI, TP-SRR,
TP-VPF, TP-RD, and TP-MTI.

−

Short text message statement.

−

Destination address: consisting of the destination address, address length
and destination address type.

−

Protocol identifier.

−

Data encoding scheme.

−

Validity duration.

−

Data length.

−

User data: consisting of the user data header and the data encoded in PDU
format.

‎Figure 5-1 shows an example of data encoded in PDU format of submitted type.

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Figure 5-1 Example of data encoded in PDU format of submitted type

‎Figure 5-2 shows the general SMS process.
Figure 5-2 General SMS process
SMS

Start

SMS initialization

Write short
messages

Delete short
messages

Read short
messages

Receive
short messages

Send short
messages

Status report

End

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5.2 Initializing SMS
5.2.1 Reference Process
Command

Description

AT+CSCA?

Query the SMSC address.

+CSCA:
"13800688509",129
OK
AT+CSCA="+8613800755
500"

Set the SMSC address to the SMSC number of
China Mobile's Shenzhen Branch.

OK
AT+CSMS?

Query the short message service type.

+CSMS: 0,1,1,1
OK
Query the configuration of the new message
indications to TE.

AT+CNMI?
+CNMI: 0,0,0,0,0
OK
AT+CNMI=2,1,2,2,0

Configure the new message indications to TE.

OK
AT+CPMS?

Query the preferred short message storage.

+CPMS:
"SM",12,20,"SM",12,20,"S
M",12,20
OK
AT+CPMS="SM"

Set SM as short message storage medium.

OK
AT+CGSMS?

Query the MO SMS bearer domain.

+CGSMS: 1
OK
AT+CMGF?

Query the short message format.

+CMGF: 0

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Command

SMS Application Scenarios

Description

OK
AT+CMGF=0

Set the short message format to PDU.

Use the AT+CMGF command to set short message format: AT+CMGF=0 sets the
short message format to PDU.
The SMSC address provided by the service provider must be specified. In PDU mode,
the SMSC address is contained in the PDU packets. Therefore, in PDU mode, the
AT+CSCA command is optional.
To use the SMS features specified in the GSM 07.05 Phase 2+, the AT+CSMS
command must be used to enable the features.
Use the AT+CNMI command to set the unsolicited indications.
Use the AT+CPMS command to select the preferred short message storage (SIM or
ME). The ME909u-521 supports only the SM (SIM card) storage.
Use the AT+CGSMS command to select the MO SMS bearer domain (PS or CS
domain). For ME909u-521, the CS domain is the preferred MO bearer domain.
Figure 5-3 SMS initialization process – part 1
SMS initialization

Start

Set the SMSC address to the SMSC
number of China Mobile's
Shenzhen Branch.

Query the SMSC
address.
AT+CSCA?

AT+CSCA="+8613800755500"

Example: SMSC
address is not specified.
+CSCA: "",129
OK

OK
Require the message
service type.

Set the message
service type.
AT+CSMS=1

AT+CSMS?

+CSMS: 0,1,1,1

+CSMS: 1,1,1

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Figure 5-4 SMS initialization process – part 2
*
Enable the notification
of new messages.

Query the unsolicited
indication state.

AT+CNMI=2,1,2,2,0

AT+CNMI?
Default values

+CNMI: 0,0,0,0,0

OK
Query the preferred storage
for the current message.

AT+CPMS?

+CPMS: "SM",13,20,"SM",13,20,"SM",13,20
OK

AT+CGSMS?

+CGSMS: 1
OK

AT+CMGF=0

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Figure 5-5 SMS initialization process – part 3
*
AT+CMGF?

+CMGF:0

AT+CMGF=0

End

5.2.2 Troubleshooting
Scenario
Error information is
returned in response to
one of the previous
commands.

Possible Error
Information

Solution

+CME ERROR: SIM
PIN required

Enter the correct PIN.

+CMS ERROR: SIM
busy

SIM card initialization has not
completed. Try again later.

5.3 Sending Short Message
5.3.1 Reference Process
Command

Description

AT+CMGF=0

Set the short message format to PDU.

OK
AT+CSCA?

Query the SMSC address.

+CSCA: "13800688509",129
OK
AT+CMGS=18

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Send a PDU message without the service center

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Command

Description

>0031000B813109731147F4
0000FF04F4F29C0E\x0A

address. The value of SMSC address is the setting
of +CSCA command.

+CMGS: 168

The message is successfully sent.

OK
AT+CMGS=18
>0891683108608805F93100
0B813109731147F40000FF0
4F4F29C0E\x1A
+CMGS: 169

Send a PDU message with the correct service
center address.

The message is successfully sent.

OK
AT+CMGS=18
>0891683108608805F03100
0B813109731147F40011FF0
4F4F29C0E\x1A
+CMS ERROR: Network out
of order

Send a PDU message with the wrong service
center address.

The message is unsuccessfully sent.

Messages in PDU format must be converted using external tools or users' software.
Tools for encoding and parsing messages in PDU format are available on the Internet.

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Figure 5-6 Sending short messages in PDU format
Sending messages in PDU format

Start
Send a short message
(given that the PDU length is 18)

SMS initialization
AT+CMGS=18

PDU message
without SCA

Press to cancel
the command

Press to send
the command.

0031000B813109731147F4
0000FF04F4F29C0E

0891683108608805F931000B
813109731147F40000FF04F4
F29C0E

Message sent
successfully

Example: Message
not sent
OK

Message sent
unsuccessfully
+CMGS:1
OK

+CMS ERROR:
Network out of
order

End

5.3.2 Troubleshooting
Scenario

Possible Error
Information

Solution

Error information is
returned in response
to one of the previous
commands.

+CMS ERROR: Network
out of order

Check the validity of the
service center address or the
state of the current network.

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5.4 Reading Short Messages
5.4.1 Reference Process
Command

Description

AT+CMGL=0

List all received unread messages.

+CMGL: 2,0,,48
0891683108608805F9040D916831
09732097F2000001432619001001
F506215744FD3D1A0E930C8429
6D9EC370BFDE86C2F23228FFA
EFF00

The format of short messages can refer to
the AT+CMGL command.

+CMGL: 4,0,,64
0891683108608805F9040D916831
09732097F2000001403261310500
32506215744FD3D1A0E930C8429
6D9EC370BFDBE83C2B0380F6A
97416FF7B80C6AVFE5E510
OK
Read the message stored in the message
storage location 4.

AT+CMGR=4
+CMGR: 1,,64
0891683108608805F9040D916831
09732097F2000001403261310500
32506215744FD3D1A0E930C8429
6D9EC370BFDBE83C2B0380F6A
97416FF7B80C6AVFE5E510

The format of short messages can refer to
the AT+CMGR command.

There are two methods to read short messages:


Method 1: Use the AT+CMGL command to list the messages that are in
specified state and stored in the preferred message storage. The following table
describes the message states. If the message sate is received unread
messages, the REC UNREAD state will be changed to REC READ after the
AT+CMGL command is executed.

Message State

PDU Mode

Received unread messages

Received read messages

Stored unsent messages

Stored sent messages

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Message State

PDU Mode

All messages



Method 2: Use the AT+CMGR command to read a message from a specified
storage location in the message storage. If the message is a received unread
message, its state will be changed to REC READ after it is read using the
AT+CMGR command.

You can use the AT+CMGL command to list all short messages so that you can view
the messages' storage locations.
Figure 5-7 Reading short messages
Reading short messages

Start
List received unread
messages in PDU format

AT+CMGL=0

+CMGL:,0,,
(messages in PDU format)
......
+CMGL:,0,,
(messages in PDU format)

AT+CMGR=n

PDU format
+CMGR:n,,
(messages in PDU format)
OK

End

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5.4.2 Troubleshooting
Scenario

Possible Error
Information

Solution

Error information is
returned in response
to one of the previous
commands.

+CMS ERROR: invalid
memory index

Check the validity of the index.

5.5 Deleting Short Messages
5.5.1 Reference Process
Command

Description

AT+CMGF=0

Set the message format to PDU mode.

OK
AT+CMGL=4

List all short messages (PDU mode).

+CMGL: 6,2,,30
0011000A917179876213000
0A713C8329BFD6681D0EF
3B282C2F83F2EFFA0F
+CMGL: 11,1,,36
0791947106004013240C919
47159826990000030804131
15748013C8329BFD6681D0
EF3B282C2F83F2EFFA0F
OK
AT+CMGD=1

Delete the message stored in storage location 1.



Either all messages stored in the preferred message storage or a message
stored in the specified storage location in the preferred message storage can be
deleted.



All read or unread messages that have been received can be deleted.



If no messages are stored in the preferred message storage, "OK" is returned
when the action to delete messages is completed.



Meanings of the DelFlag value:
−

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1: Delete all read messages in the preferred message storage, and keep the
unread, sent and unsent messages.

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−

2: Delete all read and sent messages in the preferred message storage, and
keep the unread and unsent messages.

−

3: Delete all read, sent, and unsent messages in the preferred message
storage, and keep the unread messages.

−

4: Delete all messages in the preferred message storage, including the
unread messages.

Figure 5-8 Deleting short message
Deleting short messages

Start
Prerequisite:
SMS has been initialized.
Example: Lists all short
messages in PDU format.
AT+CMGL=4

+CMGL: 1,
07919471060040
+CMGL: 2,
07919471060040
......

Delete the message
stored in
location n in the preferred
storage.

Equivalent to
AT+CMGD=n

AT+CMGD=n

X:(0-999)

AT+CMGD=n,0

AT+CMGD=x,DelFlag

+CMSERROR:

invalid memory
index

End

5.5.2 Troubleshooting
Scenario

Possible Error
Information

Solution

Error information is
returned in response
to one of the previous
commands.

+CMS ERROR: invalid
memory index

Check the validity of the index.

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Phonebook Application Scenarios

6.1 Overview
As a product embedded into a host, the phonebook scenarios include that read, write,
query and delete the phonebook entries in the SIM card.
Read Phonebook: use the AT+CPBR command to read phonebook entries.
Write phonebook: use the AT+CPBW command to save the phonebook entries into
the SIM card.
Delete phonebook: use AT+CPBW command to delete the phonebook entries in the
SIM card.

6.2 Memory Operations
6.2.1 Reference Process
Command

Description

AT+CPBS=?

Query the current storage type.

+CPBS: ("SM","EN","ON")
OK
AT+CPBS="SM"

Set the current storage type to "SM".

OK
241 indicates that 241 entries have been
stored in the storage. 250 indicates that the
maximum storage capacity of the current
storage ("SM") is 250 entries.

AT+CPBS?

+CPBS: "SM",241,250
OK

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Note that the AT commands for reading and writing phonebook entries can be used
only after the phonebook storage is selected. To select a phonebook storage, use the
AT+CPBS command.
Figure 6-1 Initializing the phonebook
Initializing the phonebook

Start
Query the available
storage types for the phonebook.
AT+CPBS=?

+CPBS:(“SM”,‎“EN”,“ON”)
OK
Query the current phonebook storage.

AT+CPBS?

+CPBS:“ON”,0,0
OK
Select SM as the storage type
AT+CPBS=“SM”

End

6.2.2 Troubleshooting
Scenario

Error information is
returned in response to
one of the previous
commands.

Issue 01 (2013-07-05)

Possible Error
Information

Solution

+CME ERROR: SIM
busy

Phonebook initialization has
not completed. Try again
later.

+CME ERROR: SIM PIN
required

Enter the correct PIN.

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Scenario

Phonebook Application Scenarios

Possible Error
Information

Solution

+CME ERROR: SIM
PUK required

Enter the correct PUK.

6.3 Reading Phonebook Entries
6.3.1 Reference Process
Command

Description

AT+CPBS?

Query the phonebook storage selection and the
maximum number of entries that can be stored.

+CPBS: "SM",9,20
OK
AT+CPBR=1,20

List all phonebook entries by their indexes.

+CPBR:
1,"+491765864491",145,"J
ohn Smith"
+CPBR:
2,"+44545896638",145,"Pa
ul Williams"
+CPBR:
3,"+44556565657",145,"Jo
e Anderson"
+CPBR:
4,"+445636934485",145,"
Oscar Thomso”
+CPBR:
5,"+445565656899",145,"H
annah Adams"
+CPBR:
6,"+447982865563",145,"S
amantha Young"
+CPBR:
7,"+449585315798",145,"A
lexis Wright"
+CPBR:
8,"+445415454646",145,"A
bigail Cox"
+CPBR:
12,"+446565689115",145,"
Kyla Clark"

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Command

Description

Figure 6-2 Reading phonebook entries
Reading phonebook entries

Start
Query the current phonebook storage type.

FD phonebook can store
up to 10 entries; currently 3
entries are stored.

Initialize the
phonebook.

+CPBS:“ON”,1,4

+CPBS:“SM”,4,250

Lists all phonebook entries from location x to location y.
AT+CPBR=x,y

Correct response

+CPBR:
1,“+491765864491”,145,“John‎Smith”
+CPBR:
2,“+445564854245”,145,“Ashley‎Jones”
...
OK

The ending location is greater
than the greatest phonebook entry index.

+CME ERROR:
invalid index

End

6.3.2 Troubleshooting
Scenario

Error information is
returned in response
to one of the previous
commands.

Issue 01 (2013-07-05)

Possible Error
Information

Solution

+CME ERROR: SIM
busy

Phonebook initialization has
not completed. Try again later.

+CME ERROR: SIM PIN
required

Enter the correct PIN.

+CME ERROR: SIM
PUK required

Enter the correct PUK.

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Scenario

Possible Error
Information

Solution

AT+CPBR=

+CME ERROR: invalid
index

The index is invalid. Check
that index 1 is within the
supported range.

+CME ERROR: invalid
index

The index is invalid. Check
that index 1 and index 2 are
within the supported range and
that index 1 is not greater than
index 2.

+CME ERROR: not
found

No entries are found in the
storage locations in index 1.
Check that there have been
entries successfully written into
these locations.

+CME ERROR: not
found

No entries are found in the
storage locations between
index 1 and index 2. Check
that there have been entries
successfully written into these
locations.

AT+CPBR=,

AT+CPBR=

AT+CPBR=,

6.3.3 Writing/Deleting Phonebook Entries
6.3.4 Reference Process
Command

Description

AT+CPBR=?

Query the ranges of parameters related to the
phonebook entries.

+CPBR: (1-250),24,14
OK
AT+CPBW="5","13903702
805",,"test"

Write a phonebook record.

OK
AT+CPBW=1

Delete the entry in index 1 in the phonebook.

There are two methods to edit phonebook entries using the AT+CPBW command:


Issue 01 (2013-07-05)

Write an entry to a specified location. This method edits the location where a
phonebook entry exists or writes a new entry to a vacant location.

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

Phonebook Application Scenarios

Write a new phonebook entry to the next location of a location that already has a
phonebook entry. This method does not require a specified storage location. The
AT+CPBW command can be used to edit phonebook entries of the "SM" or "ON"
type.

Figure 6-3 Writing phonebook entries
Writing phonebook entries

Start

Query the ranges of
parameters related
to the phonebook
entries.

AT+CPBR=?
Parameter ranges
+CPBR: (1-250),20,16

Read all phonebook entries.

+CPBR: 1,"+491765864491",145,"John Smith"
+CPBR: 3,"+441236548545",145,"Emily Miller"
Read all the returned results.
Write phonebook
parameters.

Write a phonebook entry
to a specified location.
Note: If an entry already
exists in the location,
the entry will be overwritten.

Write a phonebook
entry to a vacant location.

AT+CPBW=,"+44546465
4568",145,"Paul Williams"

+CEM ERROR:
memory full

AT+CPBW=1,"+44546465
4568",145,"Paul Williams"

+CEM ERROR:
invalid index

End

6.3.5 Troubleshooting
Scenario

Possible Error
Information

Solution

Error information is
returned in response to
one of the previous

+CME ERROR: SIM
busy

Phonebook initialization has
not completed. Try again
later.

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Possible Error
Information

Solution

+CME ERROR: SIM
PIN required

Enter the correct PIN.

+CME ERROR: SIM
PUK required

Enter the correct PUK.

Error information is
returned when writing an
entry into the
phonebook.

+CME ERROR: dial
string too long

Check that the phone
number is not too long.

Error information is
returned in response to
one of the previous
commands.

+CME ERROR: invalid
index

Check that the location index
and phone number type are
valid.

Error information is
returned when writing an
entry into the
phonebook.

+CME ERROR: invalid
characters in dial string

The phone number to be
written into the phonebook
contains invalid characters.
Delete the invalid characters
and try again.

AT+CPBW=,"123456789
01234567890123",128,"
80534E4E3A"

+CME ERROR:
memory full

The storage is full. Delete
some entries and try again.

Scenario
commands.

6.4 Searching for Phonebook Entries
6.4.1 Reference Process
Command

Description

AT+CPBF=

Search the current storage for
phonebook entries that contain
the field.

+CBPF: ,,,
+CBPF: ,,,
...
OK
Return the maximum phone
number length and maximum
name length supported by the
current phonebook storage.

AT+CPBF=?

+CPBF: ,

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Phonebook Application Scenarios

6.4.2 Troubleshooting
Scenario

Error information is returned
in response to one of the
previous commands.

AT+CPBF=

Possible Error
Information

Solution

+CME ERROR: SIM
busy

Phonebook initialization has
not completed. Try again
later.

+CME ERROR: SIM
PIN required

Enter the correct PIN.

+CME ERROR: SIM
PUK required

Enter the correct PUK.

+CME ERROR: not
found

No matches were found.
Check whether the current
phonebook storage has
entries that match the search
criterion.

6.5 Querying User Number
6.5.1 Reference Process
Command

Description

AT+CNUM

Query the SIM number.

+CNUM: [],,
+CNUM: [],,
...
OK

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6.5.2 Troubleshooting
Scenario

Error information is
returned in response to
one of the previous
commands.

Possible Error
Information

Solution

+CME ERROR: SIM
busy

Phonebook initialization has
not completed. Try again
later.

+CME ERROR: SIM PIN
required

Enter the correct PIN.

+CME ERROR: SIM
PUK required

Enter the correct PUK.

6.6 Setting the TE's Character Sets
6.6.1 Reference Process
Command

Description

AT+CSCS=?

Query the character sets supported by the
UE.

+CSCS: ("IRA","GSM","UCS2")
OK
AT+CSCS?

Query the current character set.

+CSCS: "IRA"
OK
Read the first phonebook entry. The TE
character set is the International
Reference Alphabet (IRA). The content of
the first entry's name field is "HUAWEI".

AT+CPBR=1

+CPBR:
1,"0123456789",129,"HUAWEI"
OK
AT+CSCS="UCS2"

Set the TE's character set to UCS
alphabet.

OK
AT+CPBW=1,"0123456789",129,"00
4800550041005700450049"

Issue 01 (2013-07-05)

The character set is the UCS alphabet.
The content of the phonebook entry's

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name field is
004800550041005700450049, which is
"HUAWEI" in the IRA.
OK
Read the first phonebook entry. The TE
character set is UCS alphabet. The
content of the first entry's name field is
004800550041005700450049 ("HUAWEI"
in the IRA).

AT+CPBR=1

+CPBR:
1,"0123456789",129,"004800550041
005700450049"
OK

6.6.2 Troubleshooting
None

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SIM Operation Application Scenarios

7.1 PIN Operations
7.1.1 Reference Process
Command

Description

AT+CLCK="SC",1,""

Enable PIN authentication. (
specifies the PIN. See note 1.)

OK
AT+CLCK="SC",2

Request the SIM card state.

+CLCK: 1

"+CLCK: 1" means that the SIM card is
not blocked.

OK
AT+CLCK="SC",0," "

Disable the SIM card lock. (
specifies the PIN. See note 1.)

OK
AT+CLCK="SC",2

Request the SIM card state.

+CLCK: 0

"+CLCK: 0" means that the SIM card is
not blocked.

OK
AT+CLCK="SC",1,""

Enable PIN authentication. (
specifies the PIN. See note 1.)

OK
AT+CPIN=""

Request the PIN after the module
restarts.

OK
AT+CPIN?

Request the PIN state.

+CPIN: READY

Issue 01 (2013-07-05)

Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.

HUAWEI ME909u-521 LTE LGA Module
Application Guide

SIM Operation Application Scenarios

OK
AT+CLCK="SC",2

Request the SIM card state.

+CLCK: 1

"+CLCK: 1" means that the SIM card is
not blocked.

OK
AT+CPWD="SC","","1234"

Change the PIN (1234 will be the new
PIN).

OK
AT+CPWD="SC","1113","1233"

Enter an incorrect PIN (first attempt).

+CME ERROR: incorrect password
AT+CPWD="SC","3333","1233"

Enter an incorrect PIN (second attempt).

+CME ERROR: incorrect password
AT+CPWD="SC","4711","1233"

Enter an incorrect PIN (third attempt).

+CME ERROR: SIM PUK required
Check whether the password is
requested.

AT+CPIN?
+CPIN: SIM PUK
OK
AT+CPIN="12345678","0000"

Enter the SIM PUK and specify the new
SIM PIN (activate new "SC" lock).

Notes:


After PIN authentication is enabled using +CLCK, the module must be restarted for the
change to take effect.



Either ^CPIN or +CPIN can be used to authenticate the PIN.

7.1.2 Troubleshooting
Scenario

Enable PIN authentication.
AT+CLCK="SC",1,""

Issue 01 (2013-07-05)

Possible Error
Information

Solution

+CME ERROR:
operation not
allowed

If PIN authentication has
been enabled, it cannot be
enabled again. Check
whether PIN authentication
has been enabled.

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Scenario

SIM Operation Application Scenarios

Possible Error
Information

Solution

+CME ERROR:
incorrect password

Enter the correct PIN. The
original PIN is provided by
the operator.

+CME ERROR: SIM
PUK required

Incorrect PINs have been
entered three times and the
SIM card is blocked. Run
AT+CPIN="","
" to enter the PUK to unblock
the SIM card. The PUK is
provided by the operator and
cannot be changed by users.
If incorrect PUKs are entered
10 times, the SIM card will be
permanently blocked.

+CME ERROR:
incorrect password

must be the
current PIN. Like the PIN
authentication, if incorrect
PINs are entered three times,
the PUK will be required. If
incorrect PUKs are entered
10 times, the SIM card will be
permanently blocked.

Enter the PIN.
AT+CPIN=""

Changes the PIN.
AT+CPWD="SC","",""

7.2 CRSM Command
7.2.1 Reference Process
Command

Description

AT+CRSM=176,12258,0,0,10

Read the file EFiccid with a transparent
structure. (12258 is 0X2FE2, the
EFiccid file's FID).

+CRSM: 144,0,""

After the command is processed
successfully, the EFiccid file's content
() is returned.

OK
AT+CRSM=178,28476,1,4,176,,"7F10"

Use an absolute path to read the first
entry from the EFsms file on the SIM
card's DFtelecom folder.

+CRSM: 144,0,""

is the content of the first entry.
The length of is 176 bytes.

OK
AT+CRSM=192,12258

Issue 01 (2013-07-05)

Get response of EFiccid.

HUAWEI ME909u-521 LTE LGA Module
Application Guide

+CRSM: 144,0,""
OK

SIM Operation Application Scenarios

is the response data of
EFiccid. For details about ,
refer to the ETSI TS 102.221 protocol.

AT+CRSM=214,28421,0,0,2,"0012"

Update the content of the transparent
structure EFli file on the SIM card.

+CRSM: 144,0,""

Update succeeded.

OK
AT+CRSM=220,28476,1,4,176,"1111",
"7F10"

Update the content of the linear fixed
structure EFsms file on the SIM card.

+CRSM: 144,0,""

Update succeeded.

OK
AT+CRSM=242

Obtain the current directory information.

+CRSM: 108,"",""

indicates ’s length in
byte.

indicates the current directory
status by hexadecimal.

Notes:

Issue 01 (2013-07-05)



To read or update a file, appropriate commands must be used according to the file's
structure type (for details, refer to the description of file properties in the 3GPP TS 31.102
protocol). For transparent structure files, use 176 (Read Binary) and 214 (Update Binary).
For linear fixed structure files, use 178 (Read Record) and 220 (Update Record).



If is not contained in the command, the module will prefer to access the files with
the same FID in the current directory.



Files can be accessed only when the access criteria are met. Otherwise the SIM card will
return PSWs indicating that the access authentication failed. If an EF file's read privilege is
PIN protected and the module does not have the PIN authenticated, PSWs indicating that
the access authentication failed will be returned after the +CRSM command is used to read
the EF file.



To use the +CRSM command to access the file content on the SIM card, the parameters
contained in the command must strictly meet the requirements in the ETSI TS 10.2221 and
3GPP TS 31.102. For detailed requirements, refer to the ETSI TS 102.221 and 3GPP TS
31.102

HUAWEI ME909u-521 LTE LGA Module
Application Guide

SIM Operation Application Scenarios

7.2.2 Troubleshooting
Scenario

Possible Error
Information

Update the content of the
linear fixed structure EFsms
file on the SIM card.

+CRSM: 105,129,""

AT+CRSM=178,12258,0,0,
10

Update the content of the
linear fixed structure EFsms
file on the SIM card.

+CRSM: 105,130,""

AT+CRSM=220,28476,1,4,
176,"1111","7F10"

Issue 01 (2013-07-05)

Solution
The status word (SW)
indicates a Read command
error occurred. Files with a
transparent structure should be
read using 176 (READ
BINARY).
The PSW indicates that the
security conditions were not
met. To update the EFsms
file, the correct PIN is
required.

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Sleeping and Waking Up Application Scenarios

Sleeping and Waking Up Application
Scenarios

As an embedded component in the host, the module also consumes power, which
increases the power consumption of the integrated product. Therefore, the most
important task of power management is to reduce the power consumption of the
integrated product by enabling the module's sleep mode when necessary.
The host and the module need to wake each other up from sleep if communication is
required. Therefore, another task of power management is to provide a wake-up
control mechanism for the host and module.
Power management involves three parts: the host system software (including the
USB driver/UART driver/GPIO driver/sleep mechanism functions), connection
hardware between the host and module, and the module's software wake-up
mechanism.
This chapter is mainly concerned with the module's software wakeup mechanism,
including the wake-up principle, how USB related events impact on the waking up of
the module and remotely waking up the module, and how the module remotely wakes
up the host.
This chapter briefly describes the power management related connection hardware
between the host and module.
This chapter does not describe the host system software. For example, if the host
runs on a Windows or Mac system, Huawei will provide a USB driver program
corresponding to the module. If the host runs on an Android system, Huawei will
provide HUAWEI Module Android RIL Integration Guide for users to configure the
USB-based wakeup function of the module. If the host runs on a Linux system, power
management is supported only when the Linux Kernel version is 2.6.35 or later.
This document describes typical module application scenarios. A host can be
designed based on the actual system features and the application scenarios of the
module to reduce power consumption of both the module and integrated product.
After the host is designed as recommended by this document, the module's power
consumption and the whole unit's power consumption can meet the performance
requirements. For details, see related description in the product manual.

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Sleeping and Waking Up Application Scenarios

8.1 Hardware Interfaces
The module communicates with the host using mainly USB or UART. For details
about pins related to power management, see ‎Table 8-1 .
For corresponding interface numbers and reference design for the pins, see
Hardware Guide for each product.
Table 8-1 Power management related pins
Interface

PCIE

LGA

Pin name

WAKE#

WAKEUP_OUT

Direction

Functional Description

Diagram

Output

When a wake-up source arrives, this
pin output a low-level-voltage pulse
lasting for 1s during which if other
wake-up sources arrive, the module
will ignore the later wake-up requests.
In other words, the module will not
output a second pulse during this 1s.

‎Figure 8-1

Output

When a wake-up source arrives, this
pin output a high-level-voltage pulse
lasting for 1s during which if other
wake-up sources arrive, the module
will ignore the later wake-up requests.
In other words, the module will not
output a second pulse during this 1s.

‎Figure 8-2

When the pin carries a high-level
voltage, the states of the module are
as follows:
The module will be prohibited to enter
sleep mode if the module is awake.
LGA

WAKEUP_IN

Input

The module will be woken up if the
module is in sleep mode.

‎Figure 8-3

When the pin carries a low-level
voltage, the module is allowed to enter
sleep mode. (By default, the pin is set
to INPUT/PD, which is, the software
detects a low-level voltage on the pin
when the pin is not connected.)
Indicate the state of the module.
LGA

SLEEP_STATUS

Output

When the pin carries a high-level
voltage, the module is in working
mode. When the pin carries a lowlevel voltage, the module is in sleep
mode.

‎Figure 8-4

Note:
The PCIE interface does not support UART.

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Application Guide

Sleeping and Waking Up Application Scenarios

8.2 Sequence Diagram
Figure 8-1 WAKE# PIN output sequence

Figure 8-2 WAKEUP_OUT PIN output sequence

Issue 01 (2013-07-05)

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Sleeping and Waking Up Application Scenarios

Figure 8-3 WAKEUP_IN PIN input sequence

About the vote, see section ‎8.3.1 .
Figure 8-4 SLEEP_STATUS PIN output sequence

8.3 Software Interfaces
8.3.1 Principle
The module runs on a multi-task software system. The sleep task is granted with the
lowest priority and assigned to detect whether the module can enter sleep mode.
Other tasks (such as the RF, SIM card, USB) have voting rights. They vote to decide
whether the module can enter sleep mode. When no other tasks are running, the
sleep task is executed. If the sleep task detects that all other tasks agree on the
module's sleep, the module enters sleep mode, as shown in ‎Figure 8-5 . At this time,
the baseband chip reduces the work frequency, and the RF enters the Discontinuous
Reception (DRX) mode.

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HUAWEI ME909u-521 LTE LGA Module
Application Guide

Sleeping and Waking Up Application Scenarios

Figure 8-5 Currency state when the module is in sleep mode

T 2(SLEE P )

T 1(W akeup)

For more information about the module's sleep procedure, see ‎Figure 8-6

Note:
The module's sleep mode is different from working mode or flight mode set using the
AT+CFUN command. The RF will be turned off when the module enters LPM mode using the
command AT+CFUN=0 while the RF will enter DRX mode without being turned off when the
module is in sleep mode. For more details, refer to HUAWEI ME909u-521 LTE LGA Module AT
Command Interface Specification.

The module enters sleep mode automatically when the sleep task detects that all
other tasks agree on the module's sleep. The sleep period of the module depends on
the current working state and circumstance. The period may last for several seconds,
or up to several minutes.

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HUAWEI ME909u-521 LTE LGA Module
Application Guide

Sleeping and Waking Up Application Scenarios

Figure 8-6 Sleep procedure

8.3.2 USB and Sleep
USB is an important communication channel between the module and the host.
According to the USB protocol, normally a hub or a root hub periodically sends Start
of Frame (SOF) data packages (one data package per ms using full-speed USB and
one package per 125 µs using high-speed USB). Through this mechanism, USB
always votes to stop the module from entering sleep mode.
When the USB driver provided by Huawei detects that the module and the host have
not exchanged data in 5 seconds, the USB driver will enable the port's suspend
feature, stopping SOF data packages being sent and suspending the USB controller.
This enables the USB to vote to agree the module's sleep.

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Application Guide

Sleeping and Waking Up Application Scenarios

Note:
If the USB driver used is developed by users or is integrated with external application, ensure
that the USB driver supports the USB suspend features (including selective suspend and
global suspend, as defined in the USB standard.)

8.3.3 UART and Sleep
UART is an important communication channel between the module and the host. If
the host uses UART (a TTL level Interface), it can connect to the module's UART
directly. If the host uses RS232, it can connect to the module's UART through a
conversion chip such as MAX232.

Note:
If the module is in sleep state, the host send data to module only by UART that can’t wakeup
the module. It must be used with WAKEUP_IN pin.

8.3.4 Module Wake-up
RF periodically wakes up the module based on the DRX cycle (depending on the
actual configuration of the network system), as shown in ‎Figure 8-5 .
Other aperiodic events include:
1.

The host sends data using USB or pulls WAKEUP_IN up.

Changes on the network, for example, an incoming call, an incoming text
message, a signal change, a network working mode change, a network search,
an IP data package (when a dial-up network connection is set up).

Software system events such as a timer

Abnormal events, for example, an antenna drops or a SIM card becomes loose.

8.3.5 Host Woken up by Module
Wake-up Source
A wake-up source is a module event that can wake up the host, for example, an
incoming voice call, a text message, data (PPP data, TCP/UDP data from the
network), and unsolicited messages.

Remotely Waking up the Host Using USB
When the host is in sleep mode and the USB controller is in suspended mode, if the
module needs to send data to the host (for example, a wake-up source has arrived),
the module sends a remote wake-up signal that lasts 3 ms to inform the host to start
USB resume (as shown in ‎Figure 8-7 ). To complete the procedure, the following
conditions must be met:
1.

Issue 01 (2013-07-05)

The USB controller on the host supports USB remote wake-up and can wake up
the host.

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Sleeping and Waking Up Application Scenarios

The USB driver enables or disables remote wake-up by executing
SET_FEATURE and CLEAR_FEATURE commands. Therefore, remote wake-up
must be enabled on the USB driver before USB enters suspended mode.

When the host receives the remote wake-up signal from the module, the host
needs to send a full speed K signal that lasts at least 20 ms. When the USB
controller resumes, the host must send the SOF token within 3 ms from the
startup of the idle state. Otherwise, the module enters suspended mode again,
as shown in ‎Figure 8-7 .

HS Hub

Figure 8-7 USB resume time sequence
Signaling
Start of
Resume
Signaling

Signaling
>20ms

<3.0ms

D+
FS idle

FSK

HS idle

uSOF

HS Device

Dif remote
Start of
wake up
Resume
Signaling 3ms

<1.33us

Device
Resumed

Device sees
first activity

Figure 8-8 Successful procedure of remote wake-up

WAKEUP_OUT Waking up the Host
The module will output a 1s pulse using WAKE# as shown in ‎Figure 8-1 or
WAKEUP_OUT as shown in ‎Figure 8-2 when a wake-up source arrives. The host
wakes itself up after detecting the level change.

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Application Guide

Sleeping and Waking Up Application Scenarios

Remote Wake-up Configuration
The power consumption of the host increases if it is frequently woken up. The host
can configure the module's wake-up sources using ^WAKEUPCFG and ^CURC
command so as to reduce the power consumption.
The ^WAKEUPCFG command can be used to choose wake-up sources and the
wake-up channel (USB or WAKEUP_OUT). The ^CURC command can choose
unsolicited messages. For more details, refer to AT Command Interface Specification.

8.4 Application Scenarios: System with USB Connection
only
A host running Android, with support for USB suspend, USB remote resume, voice
calling, and text messages.

8.4.1 Hardware Connection
The host connects to the module using USB.

8.4.2 Software Procedure
Command

Description

AT^WAKEUPCFG=?

Query the parameter range of
WAKEUPCFG.

^WAKEUPCFG: (0-1),(0-3),(0-15)
OK
AT^WAKEUPCFG=1,2,15

Configure the module to make sure
that incoming calls, text messages,
data, and unsolicited messages can
remotely wake up the host using
USB.

OK
Query the parameter range of
CURC.

AT^CURC=?
^CURC: (0-2)
OK
AT^CURC=2,820,1FFFFFFFFFFFFFFF

Issue 01 (2013-07-05)

The host wakes up from sleep if any
of the following occurs: The SIM
card state changes such as the SIM
card is removed (^SIMST); the
number of text messages exceeds
the limit (^SMMEMFULL). Other
unsolicited messages are saved in

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Sleeping and Waking Up Application Scenarios

the cache when the host is in sleep
mode, and reported to the host
when it wakes up.
OK

8.4.3 Advantages
With software configuration, while the system requirements (calling and text
messages) are met, the number of times the host is woken up by unsolicited
messages, and consequently the power consumption, are reduced.

8.5 Application Scenarios: System with USB and
WAKEUP_OUT
A host running Android, with support for text messages, but not USB remote resume
or voice calling.

8.5.1 Hardware Connection
The host must connect to the module using USB and WAKEUP_OUT pins

8.5.2 Software Procedure
Command

Description

AT^WAKEUPCFG=?

Query the parameter range of
WAKEUPCFG.

^WAKEUPCFG: (0-1),(0-3),(0-15)
OK
AT^WAKEUPCFG=1,1,14

Configure the module to make sure
that text messages, data, and
unsolicited messages can remotely
wake up the host using the
WAKEUP_OUT pin.

OK
AT^CURC=?

Query the parameter range of CURC.

^CURC: (0-2)
OK
AT^CURC=2,820,1FFFFFFFFFFFFFFF

Issue 01 (2013-07-05)

The host wakes up from sleep if
either of the following occurs: The
SIM card state changes, such as the
SIM card is removed (^SIMST); the

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Sleeping and Waking Up Application Scenarios

number of text messages exceeds
the limit (^SMMEMFULL). Other
unsolicited messages are saved in
the cache when the host is in sleep
mode, and reported to the host when
it wakes up.
When the host is awake, unsolicited
messages are reported to the host.
OK

8.5.3 Advantages
A solution is provided for systems not supporting USB remote resume.
With software configuration, while the system requirements (calling and text
messages) are met, the number of times the host is woken up by unsolicited
messages, and consequently the power consumption, are reduced.

8.6 System with Other Connection Methods
If the host can be connected to the module only using UART, refer to the HUAWEI
ME909 Series LTE LGA Module Brief Hardware Guide. If the host can connect to the
module using USB/UART/WAKEUP_OUT and can support USB remote wake-up and
UART remote wake-up, prioritize USB remote wake-up over WAKEUP_OUT remote
wake-up. For details about the software procedure, refer to the earlier sections while
considering the host system feature.

Issue 01 (2013-07-05)

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Thermal Protection Application Scenarios

9.1 Pre-configuration
Command

Description

AT^CURC=2,0x8000000000,0x8000000000

Enable the thermal protection
unsolicited indication when the
module is working or in sleep
mode.

OK
^THERM: 1

When the temperature is higher
than the temperature protection
threshold, the module enables
thermal protection: The module
turns off its RF and reports to the
host.

^THERM: 0

When the temperature is lower than
the temperature protection
hysteresis threshold, the module
disables thermal protection: turns
on its RF and reports to the host.

9.1.1 Troubleshooting
None

9.2 Thermal Protection Process


When the module's temperature is lower than 99°C, the module works normally.



When the module's temperature is higher than 99°C, the module enables
thermal protection: turns off its RF transmission and presents the ^THERM: 1
indication. When the module's temperature is lower than 85°C, the module

Issue 01 (2013-07-05)

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Thermal Protection Application Scenarios

disables thermal protection: turns on its RF transmission, and presents the
^THERM: 0 indication.

Notes:

Issue 01 (2013-07-05)



During an emergency call, if thermal protection is enabled, the module will present an
indication but will not take thermal protection actions such as turning off its RF or shutting
down.



After thermal protection is enabled, users cannot make emergency calls.



Thermal protection is designed to protect the module from being damaged by
overtemperature. To work in high temperature environments, both the module and its
peripheral components must be able to resist the same temperature.

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Module Powering Off and Resetting Application
Scenarios

Module Powering Off and Resetting
Application Scenarios

10.1 Restarting the ME
10.1.1 Reference Process
Command

Description

AT+CFUN=1,1

Restart the module.

The ME can be reset or restarted using the AT+CFUN command. After the restart,
the module must register with the network and authenticate its SIM card’s PIN.

10.1.2 Troubleshooting
None

10.2 Power Off ME
10.2.1 Reference Process
Command

Description

AT^MSO

Power off the module.

After the command is received, the module will only do the preparative work of
power-off such as deregister. The host should cut off the power in order to finish the
power-off operation.

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HUAWEI ME909u-521 LTE LGA Module
Application Guide

Module Powering Off and Resetting Application
Scenarios

10.2.2 Troubleshooting
None

Issue 01 (2013-07-05)

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Appendix

11.1 Relative Documents
1.

HUAWEI ME909u-521 LTE LGA Module AT Command Interface Specification

3GPP 27.007

3GPP 27.005
Equipment (DTE-DCE) interface for Short Message Service
(SMS) and Cell Broadcast Service (CBS)

3GPP 23.040

Technical realization of the Short Message Service(SMS)

3GPP 31.102

Universal Subscriber Identity Module(USIM) application

3GPP 24.008
Mobile radio interface Layer 3 specification; Core network
protocols; Stage 3

3GPP 29.002

Mobile Application Part (MAP) specification

3GPP 22.004

General on supplementary services

ETSI TS 102.221 Smart Cards; UICC-Terminal interface; Physical and logical
characteristics

AT command set for User Equipment (UE)

11.2 Acronyms and Abbreviations
Table 11-1 List of Abbreviations
Acronym or Abbreviation

Expansion

3GPP

Third Generation Partnership Project

APN

Access Point Name

Attention

Circuit Switched (CS) domain

DCE

Data Circuit Equipment

DTE

Data Terminal Equipment

GPRS

General Packet Radio Service

GSM

Global System for Mobile Communications

Issue 01 (2013-07-05)

HUAWEI ME909u-521 LTE LGA Module
Application Guide

Appendix

Acronym or Abbreviation

Expansion

IMEI

International Mobile Equipment Identity

Internet Protocol

LTE

Long Term Evolution

Mobile Equipment

Mobile Station

PDP

Packet Data Protocol

PDU

Protocol Data Unit

Personal Identity Number

PPP

Point-to-Point Protocol

PUK

PIN Unblocking Key

Packet Switched (PS) domain

QoS

Quality of Service

SIM

Subscriber Identity Module

SMS

Short Message Service

Terminal Equipment

User Equipment

UMTS

Universal Mobile Telecommunications System

USIM

Universal Subscriber Identity Module

WCDMA

Wideband CDMA

Table 11-2 Phonebook-related abbreviations
Abbreviation

Full Name

SIM phonebook

SIM emergency number

SIM own numbers

Issue 01 (2013-07-05)

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