HUAWEI ME909u-521 LTE LGA Module

 

Application Guide

SMS Application Scenarios

5.4.2 Troubleshooting

 

Scenario

 

 

Possible Error

 

 

Solution

 

 

 

 

 

 

 

 

 

Information

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Error information is

 

 

 

 

 

 

 

returned in response

 

+CMS ERROR: invalid

 

 

Check the validity of the index.

 

to one of the previous

 

memory index

 

 

 

 

 

 

 

 

 

commands.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

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.

 

 

OK

 

 

 

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:

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

Issue 01 (2013-07-05)

Huawei Proprietary and Confidential

34

Copyright © Huawei Technologies Co., Ltd.

 

 

Page 34
Image 34
Huawei ME909u-521 manual Deleting Short Messages, AT+CMGL=4, EF3B282C2F83F2EFFA0F AT+CMGD=1

ME909u-521 specifications

The Huawei ME909u-521 is a cutting-edge module designed to meet the increasing demand for mobile broadband connectivity in various industrial and commercial applications. This compact and robust device is primarily used for M2M (Machine-to-Machine) communication and IoT (Internet of Things) solutions. It supports a wide range of features and technologies that make it a versatile choice for businesses looking to enhance their operational efficiency through cellular connectivity.

One of the key features of the ME909u-521 is its support for multiple frequency bands. It is compatible with 4G LTE networks, ensuring high-speed data transmission and reduced latency. This capability allows for seamless communication in various environments, making it an ideal solution for applications such as smart cities, telematics, transportation, and remote monitoring.

In addition to LTE capabilities, the ME909u-521 also supports 3G and 2G networks, providing fallback options in areas where 4G coverage may be limited. This multi-network support guarantees reliable connectivity, which is crucial for mission-critical applications. The module is designed to maintain stable connections even in challenging conditions, such as in-motion environments or areas with fluctuating signal strengths.

The Huawei ME909u-521 features a compact form factor, making it easy to integrate into a wide range of devices and applications. Its small size reduces the overall footprint, which is particularly advantageous for space-constrained installations. Furthermore, the device is equipped with advanced power management features that help optimize energy consumption, extending the lifespan of connected devices.

For enhanced security, the ME909u-521 integrates robust encryption protocols to protect data transmission over mobile networks. Security is a top priority for M2M and IoT applications, and this module ensures secure communication by adhering to global standards and best practices.

Another notable characteristic is its extensive support for various interfaces, including UART and USB, facilitating seamless integration with different hardware systems. This flexibility allows developers to quickly implement and scale their solutions based on specific project requirements.

Overall, the Huawei ME909u-521 is a powerful connectivity module that combines high-speed communication, versatility, and reliability. With its state-of-the-art technologies, it is well-suited for a wide array of applications, making it a valuable asset for businesses looking to advance their digital transformation initiatives. Whether utilized in smart grids, remote monitoring, or intelligent transportation systems, the ME909u-521 stands out as a leading solution in the M2M and IoT landscape.