Basic At Command Processing Principles; Ports; At Command Processing Mechanism - Huawei ME936 Application Manual

HUAWEI ME936 LTE M.2 Module
Application Guide

1.3 Basic AT Command Processing Principles

1.3.1 Ports

The ME936 provides three ports to interact with its host:
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The ME936 also provides a port for debugging:
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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, and GPS) in
series. The AT commands can parallel processing. It means that an AT command can
be processed when the previous AT command processing hasn't been completed.
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.
Issue 02 (2017-12-11)
Network Card port: simulated using USB, for establishing data connection.
Port name: HUAWEI Mobile Connect - Network Card
PCUI port: simulated using USB, for AT command interaction only.
Port name: HUAWEI Mobile Connect - PCUI Interface
GPS port: simulated using USB, for reporting NMEA data.
Port name: HUAWEI Mobile Connect - GPS Interface
DIAG port: simulated using USB, for DIAG (diagnostic) command interaction
(mainly used to debug modules at present).
Port name: HUAWEI Mobile Connect - Application Interface
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