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This guide describes a workaround method for how to enable the serial (AT/NMEA) interfaces in Windows 8 and 10 for Huawei HiSilicon based cellular modules that normally only expose MBIM interface.

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This archive contains the guide, library and sample code for accessing Huawei extended AT commands over MBIM interface in Microsoft Windows 8 and newer systems where no AT serial ports are available from Huawei Modules.

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Uploaded at
2017-08-17 13:41:18
Last updated
2017-08-17 13:41:18
Version
r1
Requirements
Microsoft Windows 8 and newer (that uses MBIM)
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This archive contains the Windows drivers for Huawei modules with HiSilicon chipset

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Uploaded at
2018-05-03 14:48:09
Last updated
2018-05-03 14:48:09
Version
V.5.06.10.05
Requirements
Microsoft Windows
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Huawei ME909s-821 LGA
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This archive contains the Windows drivers V.5.06.04.05 for Huawei modules with HiSilicon chipset

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HUAWEI only provides Windows CE driver package. It is a stream driver framework. MDD (Model Device Driver) layer supplies the serial device's interface, and PDD (Platform Dependent Driver) layer is responsible for interacting with USB stack. Please refer to MSDN (Microsoft Developer Network) for more information.

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Uploaded at
2014-12-18 14:20:39
Last updated
2017-03-24 11:23:22
Version
5.07.01.00
Requirements
Windows CE 5.0/6.0/7.0 systems running on the CPU (Central Processing Unit) of which the architecture is ARM (Asynchronous Response
Mode) or MIPS (Microprocessor without Interlocked Pipeline Stages).
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Huawei ME909s-120 LGA dev.kit
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Techship Starter kit Huawei ME909s
Question

How to change USB composition mode to Mobile Broadband Interface (MBIM) that is used by Windows 8 and 10 systems for data connectivity and enabling support for the built-in connection manager in Windows?

Solution

This is done by sending AT commands to the Modem or AT serial interfaces that are accepting AT commands and changing the USB endpoint composition:

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 SIM7xxx series modules:
AT+CUSBPIDSWITCH=9003,1,1
AT+CRESET

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

Telit LM940:
AT#USBCFG=2
AT#REBOOT

Telit LE910x V2:
AT#USBCFG=3
AT#REBOOT

On Huawei modules the USB mode changing is done automatically by the Windows drivers and otherwise defaults to the modules standard endpoint interfaces.

Question

Why is there no serial interface for AT-commands available in Microsoft Windows 8/10 and newer, while in Windows 7 all the traditional module serial interfaces are available?

Solution

Microsoft demands cellular module vendors to use the Mobile Broadband Interface Model (MBIM) interface for signaling in newer operating systems like Windows 8 and 10 rather than the previous serial based control channels with AT commands.

The serial ports are phased out and enumeration in the host system of these are dropped by many manufacturers because of Microsofts requirements.

The connections can be controlled graphically in Windows by the systems built in connection manager as well as by commands in the command prompt starting with: netsh mbn

Microsoft: Overview of mobile broadband

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