HUAWEI ME909u-523 LTE LGA Module
Application Guide
Overview
Issue 04 (2014-12-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
11
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.
Figure 1-1
AT command processing sequence diagram
TE
UE
AT command 1
AT command 2
Return results of AT command 1
AT command 3
Ignore AT
command 2
Process AT
command 1
Process AT
command 3
Return results of AT command 3