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Sierra Wireless EM7355

Article Number: 10218
Supplier number: 1102573

The Sierra Wireless EM7355 Embedded Module is a M.2 modem that provides LTE, DC-HSPA+, HSPA+, HSDPA, HSUPA, WCDMA, GSM, GPRS, EDGE, CDMA, and GNSS connectivity for notebook, ultrabook, and tablet computers over several radio frequency bands. The device also supports 2G / 3G roaming.

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ordered any more.

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UMTS Bands
B1 (2100)
B2 (1900)
B26 (850)
B8 (900)
B4 (AWS)
MIMO (Multiple-Input Multiple-Output)
Yes
LTE Bands
B2 (1900)
B4 (AWS)
B13 (700c)
B17 (700bc)
B5 (850)
B25 (1900)
GSM/EDGE Bands
B5 (850)
B8 (900)
B3 (1800)
B2 (1900)
Manufacturer
Sierra Wireless
CDMA bands
800
1900
LTE Region
North America
Module KEY
B
Form Factor
M.2 3042
Technology
LTE - cat 3
Antenna Interface
IPEX MHF-4
GPS
Yes
GNSS technology
GPS
GLONASS
Max DL Speed
100 Mbps
Max UL Speed
50 Mbps
Chipset
Qualcomm
Operating Temperature Range
-25 °C – 60 °C
Driver Support
Windows 7
Linux
Windows 8
Interface
USB 2.0
Voice Call Support
No
GNSS antenna support
Passive
GPIO
No
Carrier Certification
AT&T
Verizon
Sprint
T-Mobile
Rogers
Telus
Bell
Extended Operating Temperature Range
-25 °C – 60 °C
Certification
FCC
NCC
PTCRB
IC
Size
42 x 30 x 2.3 mm
Technical details:
This module will be shipped with the latest firmware and BOM code. At this moment the module will be shipped with the firmware 05.05.58.00 and BOM code 1102573. If you would like to order with a special firmware or BOM code, please contact sales@techship.se

This datasheet shows an comparison overview of the EM-series cellular modules from Sierra Wireless.

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This document contains the Linux SDK application guide.

Download

Uploaded at
2016-05-25 13:03:27
Last updated
2018-12-03 10:11:48
Version
1.26
Requirements
Linux OS
The following processors are supported:
x86 (32bit & 64bit)
ARM
PPC
MIPS

The following devices are supported:
MC77xx
MC83x5
SL/MC9090
EM/MC73xx
AR7554
EM/MC74xx
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Sierra Wireless EM7355
Sierra Wireless EM7305
Sierra Wireless MC7350
Sierra Wireless MC7700
Sierra Wireless MC7750

Mobile devices using 3G and LTE are equipped with a second receive antenna for improved performance.
This second antenna is required for receive diversity and MIMO.
These concepts, with their associated benefits, requirements and test possibilities, are described in this Application Note in a Q&A format.

Download

This manual describes the Standard AT commands for User Equipment according to the 3GPP TS 27.007 standard
(version 15.4.0 Release 15)

For manual on proprietary model specific extended AT commands please refer to download section of product page.

Download

This document provides full description of AT commands for Sierra Wireless AirPrime wireless modules and AirLink Programmable Gateways.
Please refer to the specific Sierra Wireless module AT Command Reference document for list of supported AT commands.

Download

This document describes supported standard and proprietary AT
commands available for Sierra Wireless AirPrime ® Mini Card (MC)
and Embedded Module (EM) products, and provides details where
commands vary from the standards.

Download

Uploaded at
2016-10-07 13:45:39
Last updated
2016-10-07 13:45:39
Version
4118014
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AT Command Reference Guide for AirPrime Embedded Modules EM73XX/EM7655/EM8805

Download

Uploaded at
2014-09-30 17:52:50
Last updated
2015-09-24 18:32:19
Version
Rev 1
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Sierra Wireless EM7355
Sierra Wireless EM7305

This archive contains the Sierra Wireless EM/MC73 series certificates archive
MC7354 IC, NCC, FCC
MC7304 CE
EM7305 FCC, CE
EM7355 IC, NCC

Download

Uploaded at
2017-02-09 13:12:32
Last updated
2017-02-09 13:12:53
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This zip archive contains the Sierra Wireless Linux QMI SDK files:
Linux QMI SDK Full Version
Linux QMI SDK Lite Version
Linux QMI SDK Customer Release Note
Sierra Linux QMI drivers
Linux QMI SDK Application Developers Guide
Linux QMI Drivers - Customer Release Notes

Download

Uploaded at
2017-02-20 10:14:45
Last updated
2019-08-13 13:11:45
Version
V.04.00.21
Requirements
Linux kernel compatibility: 2.6.32 to 5.0
The following processors are supported:
x86 (32bit & 64bit), ARM, PPC, MIPS

The following Sierra Wireless devices are supported:
EM/MC74xx
EM75xx
EM/MC73xx
WP76xx
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Sierra Wireless EM7430 LTE Cat 6
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Sierra Wireless MC7350

This ZIP archive contains the Sierra Wireless Linux QMI drivers with manual and release notes.
In the Application Developers Guide you find instructions on how to install the drivers.

Linux QMI GobiNet and GobiSerial Drivers - Customer Release Notes
Linux QMI SDK Application Developers Guide.pdf
Sierra Linux QMI drivers

Download

This archive contains the Sierra Wireless Android RIL library with related manuals and release notes.

Download

Uploaded at
2017-10-05 17:57:52
Last updated
2019-07-16 16:18:35
Version
Android RIL_V9.0.4.0_ARM_64_bin_Android RIL_V8.1.2_x86_64_bin
Requirements
The following Android versions are supported:
• x86
▪ 5.0 (Lollipop)
▪ 5.1 (Lollipop)
▪ 6.0 (Marshmallow)
▪ 7.1 (Nougat)
▪ 8.1 (Oreo)

• ARM
▪ 5.0 (Lollipop)
▪ 5.1 (Lollipop)
▪ 6.0 (Marshmallow)
▪ 7.0 (Nougat)
▪ 7.1 (Nougat)
▪ 8.0 (Oreo)
▪ 8.1 (Oreo)
▪ 9.0 (Pie)
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Sierra Wireless EM7355
Sierra Wireless MC7455 LTE Cat 6
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Sierra Wireless EM7430 LTE Cat 6
Sierra Wireless HL8518
Sierra Wireless HL8528
Sierra Wireless HL8548
Sierra Wireless HL8548-G
Sierra Wireless WP8548
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Connection manager to connect AirPrime EM/MC Series modules to your PC running Windows. Please install USB drivers as mentioned in the related items.

Download

This executable file install the Windows drivers for Sierra Wireless EM/MC Series cellular modules

Download

This executable file install the Windows drivers for Sierra Wireless EM/MC Series Modules

Download

Uploaded at
2017-01-09 15:59:22
Last updated
2017-01-09 15:59:22
Version
V.4581
Requirements
Microsoft Windows 7 / Windows 8 / Windows 10 Driver Package
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Sierra Wireless MC7354
Sierra Wireless MC7304

This is a watcher for Sierra WIreless.

It is generic and works for both dip and qmi.

Download

This archive contains the Sierra Wireless EM/MC73 Series GPS 2019 Week Roll-over NV Memory Firmware Update Patch as well as notice document.

Download

Uploaded at
2019-04-02 16:14:29
Last updated
2019-04-02 16:14:29
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These documents describe the Sierra Wireless MC73xx-SWI9X15C 05 series firmwares change notes

Download

Uploaded at
2017-06-09 18:21:47
Last updated
2018-07-10 08:38:45
Version
R01.11
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Question

How-to change the cellular modulesUSB composition mode to Mobile Broadband Interface Model (MBIM) used by Windows 8 and 10 systems for controlling and establishing data connectivity through the built-in connection manager in Windows?

Solution

This is done by sending a set of AT commands to the cellular modules Modem or AT serial interface found in Windows Device Manager. Please see list below for associated AT commands.
(For additional details, refer to the product specific software, ports, and AT commands guides found on the Techship product web pages under technical documentation tab).

After the AT commands have been received by the module and has restarted, the USB interface endpoint composition should have changed to include MBIM interface as well.

You can find the correct Serial COM port number by checking Windows Device Manager, under the Modems drop down -> (right click and see properties for selected COM port info) or under the Ports (COM & LPT) drop down.

Vendor specific commands to use:
Sierra Wireless EM75xx series module:
AT!ENTERCND="A710"
AT#USBCOMP=1,3,100D
AT!RESET

Sierra Wireless EM74xx, MC74xx series module:
AT!ENTERCND=”A710”
AT!USBCOMP=1,1,100D
AT!RESET

Sierra Wireless EM73xx, MC73xx series module:
AT!ENTERCND=”A710”
AT!UDUSBCOMP=8
AT!RESET

Simcom SIM7100, SIM7500 and SIM7600 series modules:
AT+CUSBPIDSWITCH=9003,1,1
AT+CRESET

ZTE Welink ME3630 series:
AT+ZSWITCH=8
AT+ZRST

Telit LE910C1 and LE910C4 series:
AT#USBCFG=2
AT#REBOOT

Telit LM940 and LM940A11:
AT#USBCFG=2
AT#REBOOT

Telit LM960 and LM960A18:
AT#USBCFG=2
AT#REBOOT

Telit LE910 V2 series:
AT#USBCFG=3
AT#REBOOT

On Huawei and Telit LN94x series modules the USB mode changing is done automatically by the modules Windows drivers based on current Windows version.

Please be aware that some USB mode configurations do not include any serial interfaces, making it impossible to revert the changes using AT commands.

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Huawei ME909s-821 mPCIe
Huawei ME909s-821 LGA
Huawei ME909s-120 mPCIe EU
Huawei ME909s-120 LGA EU
Huawei MU709s-6 mPCIe
SimCom SIM7100E LTE SMT EU
SimCom SIM7100E LTE mPCIe EU
SimCom SIM7100A LTE mPCIe US
SimCom SIM7100C LTE mPCIe China
Huawei ME906s-158 M.2 EU
Huawei ME909s-120 LGA dev.kit
Sierra Wireless MC7455 LTE Cat 6
Sierra Wireless EM7455 LTE Cat 6
SimCom SIM7100E LTE mPCIe SIM
Sierra Wireless MC7430 mPCIe
Sierra Wireless EM7430 LTE Cat 6
ZTE ME3610 E1A LCC
Techship Starter kit Huawei ME909s
SIMCom SIM7500A LTE SMT US
SIMCom SIM7500E LTE SMT EU
Welink ME3630 E1C LCC EU
Welink ME3630 E1C mPCIe EU
SIMCom SIM7500E LTE mPCIe EU
Welink ME3630 U1A LCC (US)
Welink ME3630 U1A mPCIe (US)
SIMCom SIM7500SA LTE mPCIe Audio
Telit LM940 LTE CAT-11, GPS, mPCIe
Telit LE910-EU V2 LTE CAT-4, mPCIe
Telit LE910-SV V2 LTE CAT-4, Verizon, mPCIe
Telit LE910-NA V2 LTE CAT-4, AT T, TM, mPCIe
Telit LE910-AU V2 LTE CAT-4, Telstra, mPCIe
Telit LE910-NA1 LTE CAT-1 LGA
Telit LE910-EU1 LTE CAT-1 LGA
Telit LE910-SV1 LTE CAT-1 LGA
Telit LE910-EU V2 LTE CAT-4 LGA
Telit LE910-NA V2 LTE CAT-4 LGA
Telit LE910D1-E1 LTE CAT-1 LGA
SIMCom SIM7600E-H LTE SMT EU
SIMCom SIM7600E-H LTE CAT-4 mPCIe EU
Sierra Wireless EM7565 LTE CAT-12
Welink ME3630 C1C mPCIe CN
SIMCom SIM7600E-H LTE CAT-4 mPCIe SIM
SIMCom SIM7600A-H LTE CAT-4 mPCIe Audio
Welink ME3630 E1C M.2 EU
Welink ME3630 E2C CAT-1 M.2 EU
Telit LE910-NA V2 LTE CAT-4, S.SKU, mPCIe
SIMCom SIM7600SA-H LTE CAT-4 mPCIe
SIMCom SIM7600A-H LTE CAT-4 mPCIe US
SIMCom SIM7600V-H LTE CAT-4 mPCIe Audio Verizon
SIMCom SIM7600SA-H LTE CAT-4 mPCIe with SIM holder
SIMCom SIM7600E LTE CAT-1 mPCIe
SIMCom SIM7600SA LTE CAT-1 mPCIe
SIMCom SIM7600E-H LTE CAT 4 -mPCIE with Audio
Telit LM960 LTE CAT-18, GPS, mPCIe
Sierra Wireless EM7511 LTE CAT-12
Sierra Wireless EM7565, CAT-12, M.2 CBRS Enabled
Telit LE910C4-NF LTE CAT-4 mPCIe
SIMCom SIM7600G-H LTE CAT-4 mPCIe
Telit LE910C1-EU LTE CAT-1 mPCIe
Telit LE910C4-EU LTE CAT-4 mPCIe
Telit LM940, HW Rev. 2, LTE CAT-11, GPS, mPCIe
Telit LM960A18 LTE CAT-18 mPCIe
Question

How can we establish data connection for cellular modules in Windows 8 and Windows 10 systems?

Solution

Microsoft Windows desktop versions starting from Windows 8 and newer have built in data connection manager for WWAN, Wifi etc. that can be used to configure, control and establish the data connection of cellular module that support MBIM interface, which most cellular modules do.

The connection managers settings and controls can be found and accessed on Windows desktop start menu through the network icon (see picture).

The Cellular tab can be found in Windows system settings and if needed the connection APN details can be manually entered through "Advanced options".

Images
Windows 10 connection manager Windows 10 connection settings
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SimCom SIM7100E LTE mPCIe EU
SimCom SIM7100A LTE mPCIe US
SimCom SIM7100C LTE mPCIe China
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SimCom SIM7100E LTE mPCIe SIM
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SIMCom SIM7500A LTE SMT US
SIMCom SIM7500E LTE SMT EU
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SIMCom SIM7500E LTE mPCIe EU
Welink ME3630 U1A LCC (US)
Welink ME3630 U1A mPCIe (US)
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Telit LE910-EU V2 LTE CAT-4, mPCIe
Telit LE910-SV V2 LTE CAT-4, Verizon, mPCIe
Telit LE910-NA V2 LTE CAT-4, AT T, TM, mPCIe
Telit LE910-AU V2 LTE CAT-4, Telstra, mPCIe
Telit LE910-NA1 LTE CAT-1 LGA
Telit LE910-EU1 LTE CAT-1 LGA
Telit LE910-SV1 LTE CAT-1 LGA
Telit LE910-EU V2 LTE CAT-4 LGA
Telit LE910-NA V2 LTE CAT-4 LGA
Telit LE910D1-E1 LTE CAT-1 LGA
Telit LN940 A11 LTE CAT-11 M.2
Telit LN940 A9 LTE CAT-9 M.2
SIMCom SIM7600E-H LTE SMT EU
SIMCom SIM7600E-H LTE CAT-4 mPCIe EU
Welink ME3630 C1C mPCIe CN
SIMCom SIM7600E-H LTE CAT-4 mPCIe SIM
SIMCom SIM7600A-H LTE CAT-4 mPCIe Audio
Welink ME3630 E1C M.2 EU
Welink ME3630 E2C CAT-1 M.2 EU
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SIMCom SIM7600SA-H LTE CAT-4 mPCIe
SIMCom SIM7600A-H LTE CAT-4 mPCIe US
SIMCom SIM7600V-H LTE CAT-4 mPCIe Audio Verizon
SIMCom SIM7600SA-H LTE CAT-4 mPCIe with SIM holder
SIMCom SIM7600E LTE CAT-1 mPCIe
SIMCom SIM7600SA LTE CAT-1 mPCIe
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Telit LN941 LTE CAT-6, M.2
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Telit LE910C4-NF LTE CAT-4 mPCIe
SIMCom SIM7600G-H LTE CAT-4 mPCIe
Telit LE910C1-EU LTE CAT-1 mPCIe
Telit LE910C4-EU LTE CAT-4 mPCIe
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Telit LM960A18 LTE CAT-18 mPCIe
Question

What Linux kernel modules and configs are commonly used for communicating with cellular modules over their USB interface?

Solution

Most cellular modules can be supported in Linux by using som of the in-kernel drivers. The physical data interface to the host Linux system is usually done over USB which enumerates a set of different endpoints/interfaces. A set of serial interfaces for Modem/PPP, AT commands, NMEA location data and chipset debug information are almost always available in all configurations.

In addition some type of network endpoint/interface are also available and exposed. This can vary between manufacturers and chipset vendors and can also commonly be configurable by using USB configuration mode switching or through vendor specific AT commands.

Recommended kernel configurations to enable are listed bellow. Many cellular modules base their Linux support on these modules and drivers. Once included in the kernel build, the USB interfaces will be detected and bound correctly out-of-the-box or after applying source code patches to the driver modules.

Configs for USB serial drivers:
CONFIG_USB_SERIAL
CONFIG_USB_SERIAL_GENERIC
CONFIG_USB_SERIAL_WWAN
CONFIG_USB_SERIAL_OPTION
CONFIG_USB_SERIAL_QUALCOMM
CONFIG_USB_ACM

Configs for Modem/PPP support:
CONFIG_PPP
CONFIG_PPP_BSDCOMP
CONFIG_PPP_DEFLATE
CONFIG_PPP_FILTER
CONFIG_PPP_MPPE
CONFIG_PPP_MULTILINK
CONFIG_PPPOE
CONFIG_PPP_ASYNC
CONFIG_PPP_SYNC_TTY

Configs for USB network drivers:
CONFIG_USB_USBNET
CONFIG_USB_NET_QMI_WWAN
CONFIG_USB_NET_CDCETHER
CONFIG_USB_NET_RNDIS_HOST
CONFIG_USB_NET_CDC_NCM
CONFIG_USB_NET_HUAWEI_CDC_NCM
CONFIG_USB_NET_CDC_MBIM

Please relate to the Techship product specific web pages for vendor specific Linux integration guides.

Below is a selection of kernel commits relating to cellular module support in Linux kernels:
qmi_wwan: Add support for Fibocom NL678 series
qmi_wwan: Added support for Telit LN940 series
qmi_wwan: Added support for Fibocom NL668 series
USB: serial: option: add support for GosunCn ME3630 RNDIS mode
USB: serial: option: add support for Simcom SIM7500/SIM7600 RNDIS mode
USB: serial: option: add Simcom SIM7500/SIM7600 (MBIM mode)
USB: serial: option: add Fibocom NL678 series
USB: serial: option: add Telit LN940 series
USB: serial: option: add Fibocom NL668 series
USB: serial: option: add GosunCn ZTE WeLink ME3630
qmi_wwan: apply SET_DTR quirk to the SIMCOM shared device ID

If you use any of the listed cellular modules, drivers and specified USB modes in the commits above, ensure that your kernel version already include the patch or apply it to your build.

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Telit LE910-SV V2 LTE CAT-4, Verizon, mPCIe
Telit LE910-NA V2 LTE CAT-4, AT T, TM, mPCIe
Telit LE910-AU V2 LTE CAT-4, Telstra, mPCIe
Telit HE910-GL SIM UMTS, miniPCIe, SIM card holder
Telit HE910-G (Voice) HSPA+ LGA
Telit HE910-DG HSPA+ LGA
Telit HE910-EUD HSPA LGA
Telit LE910-NA1 LTE CAT-1 LGA
Telit LE910-EU1 LTE CAT-1 LGA
Telit LE910-SV1 LTE CAT-1 LGA
Telit LE910-EU V2 LTE CAT-4 LGA
Telit LE910-NA V2 LTE CAT-4 LGA
Telit LE910D1-E1 LTE CAT-1 LGA
Telit LN940 A11 LTE CAT-11 M.2
Telit LN940 A9 LTE CAT-9 M.2
SIMCom SIM7000E Development Kit
Huawei MS2372h-153 LTE USB Dongle EU
SIMCom SIM7600E-H LTE SMT EU
SIMCom SIM7600E-H LTE CAT-4 mPCIe EU
Sierra Wireless EM7565 LTE CAT-12
Welink ME3630 C1C mPCIe CN
SIMCom SIM7600E-H LTE CAT-4 mPCIe SIM
Huawei MS2372h-517 LTE USB Dongle US
SIMCom SIM7600A-H LTE CAT-4 mPCIe Audio
Huawei MS2372h-607 LTE USB Dongle Asia
Welink ME3630 E1C M.2 EU
Welink ME3630 E2C CAT-1 M.2 EU
Telit LE910-NA V2 LTE CAT-4, S.SKU, mPCIe
SIMCom SIM7600SA-H LTE CAT-4 mPCIe
SIMCom SIM7600A-H LTE CAT-4 mPCIe US
SIMCom SIM7600V-H LTE CAT-4 mPCIe Audio Verizon
Telit LE910-NA1 LTE CAT-1 Developer Kit
Telit LE910-EU1 LTE CAT-1 Developer Kit
Telit LE910-SV1 LTE CAT-1 Developer Kit
SIMCom SIM7020E-SUB KIT Developer kit
SIMCom SIM7000G
SIMCom SIM7020E NB-IoT SMT
SIMCom SIM7600SA-H LTE CAT-4 mPCIe with SIM holder
SIMCom SIM7600E LTE CAT-1 mPCIe
SIMCom SIM7600SA LTE CAT-1 mPCIe
SIMCom SIM7600E-H LTE CAT 4 -mPCIE with Audio
Telit LM960 LTE CAT-18, GPS, mPCIe
Telit LN941 LTE CAT-6, M.2
Sierra Wireless EM7511 LTE CAT-12
Sierra Wireless EM7565, CAT-12, M.2 CBRS Enabled
SIMCom SIM7000G Development Kit
SIMCom SIM7000E CAT-M/NB-IoT PCIE
SIMCom SIM7000G CAT-M/NB-IoT/GSM miniPCIe
SIMCom SIM7600E Development Kit
SIMCom SIM7020G-SUB KIT
Sierra Wireless MC-WP7607 LTE CAT-4 mPCIe
Telit LE910C4-NF LTE CAT-4 mPCIe
SIMCom SIM7906E LTE CAT-6 M.2
SIMCom SIM7000A CAT-M/NB-IoT mPCIe
SIMCom SIM7600G-H LTE CAT-4 mPCIe
Telit LE910C1-EU LTE CAT-1 mPCIe
Telit LE910C4-EU LTE CAT-4 mPCIe
SIMCom SIM7070E CAT-M/NB2
SIMCom SIM7070E Development Kit
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Question

How to step by step set up a data connection over QMI interface using qmicli and in-kernel driver qmi_wwan in Linux?

Solution

Several cellular modules based on Qualcomm chipsets implements the Qualcomm Qualcomm MSM (QMI) Interface.
There is a open source Linux in-kernel driver supporting this interface and it is called qmi_wwan. This driver can be used together with ModemManager and NetworkManager to automate connection establishment and as a connection manager.

The library libqmi which ModemManager uses can also be used to communicate in a more direct way with the cellular devices over the QMI interface and to step by step do necessary configurations and trigger the data connection over the cellular network.

A selection of cellular modules can be supported:

Using RAW IP kernel configuration:
Sierra Wireless MC74 series, EM74 series, EM75** series
Telit LM940, LM960
Telit LN94x series (requires USB mode switch)
Simcom SIM7500 series, SIM7600 series, SIM7600 -H series
(can be supported in qmi_wwan driver from kernel 4.18 or by applying the following one line qmi_wwan source code patch on previous kernel builds: qmi_wwan: apply SET_DTR quirk to the SIMCOM shared device ID)

Using 802.3 IP framing kernel configuration:
Simcom SIM7100 series
Sierra Wireless MC73**/EM73** series

ModemManager combined with NetworkManager will detect the cellular modules automatically in most cases, please refer to their respective documentations on how to establish a data connection using them.

Example on how to set up the data connection step by step manually with libqmi:
First install the libqmi Linux library e.g. by using your system package manager like apt or preferably latest version from source on the Freedesktop pages for libqmi project: https://www.freedesktop.org/wiki/Software/libqmi/

Verify that you have the Linux in-kernel qmi_wwan driver installed and attached for the cellular modules QMI interface over USB:
lsusb -t
Can look e.g. like this:
...
|__ Port 1: Dev 3, If 2, Class=Vendor Specific Class, Driver=qmi_wwan, 480M
...

If the driver is not correctly loaded, please verify that the module is set to expose the correct USB endpoints configuration toward the host system and that you have followed the provided guides from the cellular module vendors, regarding how to implement the module in Linux.

Libqmi expose a command line interface that can be used to communication with the module over QMI interface.
The qmicli help will output information about all commands available:
qmicli --help-all

The cellular modules QMI control interface are usually named cdc-wdm* e.g.:
qmicli --device=/dev/cdc-wdm0

In order to allow parallel commands to be execute on the module over QMI interface, it is recommended to use the libqmi proxy function. This can be done by including the attribute -p or --device-open-proxy in every qmicli command.

If a SIM pin is required for the SIM card, use command bellow:
qmicli --device=/dev/cdc-wdm0 -p --dms-uim-verify-pin=PIN,1234

The name of the related network interface to QMI control channel can be acquired with the command:
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --get-wwan-iface

The most recent Qualcomm based cellular modules only expose QMI interfaces that can support Raw-IP mode. Sierra Wireless EM/MC74 and EM75 series modules, Telit LM940 and LN940 series for example require this.
Check what IP-mode the host system is configured for:
qmicli --device=/dev/cdc-wdm0 --get-expected-data-format
Check what IP-mode the cellular module require:
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --wda-get-data-format

to change qmi_wwan driver to use Raw-IP.
Disable the network interfaces exposed by the cellular module:
ip link set dev wwan0 down
Trigger the Raw-IP support:
echo Y > /sys/class/net/wwan0/qmi/raw_ip
Enable the network interfaces again:
ip link set dev wwan0 up

Now the data connection in the cellular module can be activated e.g. with a IPv4 type configuration on the specified APN:
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --wds-start-network="ip-type=4,apn=data.tre.se" --client-no-release-cid

Once "Network started" is displayed, you can send a DHCP request on the network interface.
Please note that not all DHCP clients in Linux can support Raw-IP format, udhcpc however support this for IPv4 over Raw-IP.
udhcpc -q -f -n -i wwan0

Disconnect the data bearer and data connection over QMI by command bellow and providing the network handle and CID returned at connection activation:
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --wds-stop-network=NETWORK_HANDLE --client-cid=CID

Additional useful commands:

Request module manufacturer:
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --dms-get-manufacturer

Get module model:
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --dms-get-model

Get firmware version:
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --dms-get-revision

Get module IDs (IMEI etc.):
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --dms-get-ids

Get SIM card status:
qmicli --device=/dev/cdc-wdm0 --device-open-proxy --uim-get-card-status

Recent cellular modules like Sierra Wireless EM7565 require at least libqmi V1.20. Check version with command:
qmicli --version

If the connection was successfully set up established, you now have data connectivity. A ping to a remote server using the cellular network interface can for example prove this:
ping -I wwan0 8.8.8.8

The ifconfig Linux tool can show the current details for the network interface:
ifconfig wwan0

libqmi is well integrated and supported in ModemManager tool for Linux. ModemManager again is well integrated and supported when using NetworkManager tool in Linux. Please note however that these two tools expect the cellular module interfaces to only be used by them so if you manually want to use the libqmi library or AT commands interfaces, please turn off/disable ModemManager and NetworkManager first.

The libqmi is a generic open source library for Linux systems and QMI protocol from Qualcomm, therefor there are commands only working on selected devices and not necessarily supported on the device you use, resulting in an error message.

Question

How to collect initial diagnostics data for Sierra Wireless EM/MC73 series cellular modules when requesting technical support?

Solution

In order to troubleshoot and solve a technical problem, we ask you to please provide information about your system and logs from the related module when creating a technical support ticket.

Please provide a problem description of what exact problem is and in what precise situations it is present.

Describe the host system:
-Hardware (system board, peripherals...)
-Operating system and detailed versions (E.g. Windows, Linux dist, release, kernel...)
-Drivers and driver versions

Identify the precise details of cellular module found on label:
-Model
-SKU/BOM or P/N code
(For RMA returns the IMEI number is required also)

If you are running on a Linux based system, please capture the terminal logs bellow:
uname -a
lsusb
lsusb -t
ifconfig -a
ls -l /dev/serial/by-id
ls -l /sys/bus/usb-serial/devices
dmesg

The logs from module firmware can be acquired by accessing one of the USB enumerated serial (COM) interfaces accepting AT commands. (In Windows this is generally modem devices or AT commands serial interfaces). Send the following AT commands to module and capture the text output and include them when creating the the technical support ticket.

Sierra Wireless :
ATI
AT!ENTERCND="A710"
AT!PRIID?
AT!HWID?
AT+CPIN?
AT+CFUN?
AT+CREG?
AT+CGREG?
AT+CEREG?
AT+COPS?
AT!GSTATUS?
AT+CGDCONT?
AT$QCPDPP?
AT+CGCONTRDP
AT+CGPADDR
AT!GOBIIMPREF?
AT!IMAGE?
AT!CUSTOM?
AT!CUSTOM=?
AT!BAND?
AT!PCINFO?
AT!PCTEMP?
AT!PCVOLT?
AT!UDUSBCOMP?
AT!UDUSBCOMP=?
AT!ERR
AT!BCFWUPDATESTATUS
AT!SELRAT?
AT!SELRAT=?

The support ticket can be created after login at: https://techship.com/technical_support/

Question

How can we capture DM serial port logs for Sierra Wireless EM/MC series cellular modules in Linux?

Solution

In the Sierra Wireless QMI SDK downloadable archive there is a a DM log tool in the tools folder.
Run the dmcapture.sh script with desired filter, and the ttyUSB0 (DM port) device selected.

E.g. like this:
sudo ./dmcapture.sh -l -d /dev/ttyUSB0 -o testlog -f ./filters/v11026_Generic_GSM_WCDMA_LTE_IP.sqf

This will create a log file that can be sent for analyze and debug to Sierra Wireless.

Question

How can we capture DM serial port logs for Sierra Wireless EM/MC series cellular modules in Linux?

Solution

In the Sierra Wireless QMI SDK downloadable archive there is a a DM log tool in the tools folder.
Run the dmcapture.sh script with desired filter, and the ttyUSB0 (DM port) device selected.

E.g. like this:
sudo ./dmcapture.sh -l -d /dev/ttyUSB0 -o testlog -f ./filters/v11026_Generic_GSM_WCDMA_LTE_IP.sqf

This will create a log file that can be sent for analyze and debug to Sierra Wireless.

Question

The Sierra Wireless EM73, EM74 and EM75 series M.2 modules are not detected in the host system when used with the M.2 to USB adapter board? (USBM2, USB3M2)

Solution

Sierra Wireless EM73, EM74 and EM75 series M.2 modules DPR pin 25 compatibility with Bplus M.2 key B to USB adapters.

When using the Bplus USB3M2 and USBM2 adapter boards you will need to change the state of the jumper JP1 on the USB adapter board. This controls the Dynamic Power Control (DPR) pin in the M.2 socket to the cellular module.

Please remove the pin jumper piece and leave all 3 pins not connected / floating. This will allow the module to operate normally.

After changing this jumper state and powering on the module and adapter board, you should see the module appear and boot up normally in the host system device.

For further details, please relate to the Sierra Wireless related product technical specification as well as the assembly guide for the adapter boards.