HUAWEI ME909u-523 LTE LGA Module
Application Guide
Serial Port Configuration Application Scenarios
Issue 04 (2014-12-08)
Huawei Proprietary and Confidential
Copyright © Huawei Technologies Co., Ltd.
86
14
Serial Port Configuration Application
Scenarios
14.1 Baud Rate Configuration
14.1.1
Reference Process
Command
Description
AT+IPR?
Query the baud rate currently used by a module.
+IPR: 115200
OK
AT+IPR="<baud rate>"
Set a module's baud rate. After a new baud rate is
specified, the module communicates using the new
baud rate.
OK
NOTE
If a module's baud rate is too low, its communication speed will be slow.
At present, the ME909u-523 supports the following baud rates: 600, 1200, 2400, 4800,
9600, 19200, 38400, 57600, and 115200.
In future, the higher speed baud rate may be supported, such as 230400, 460800, 921600,
1000000, 1500000, 2500000, 3000000, 3500000 and 4000000
14.1.2
Troubleshooting
Scenario
Possible Error
Information
Solution
Specify a baud rate not
supported by a
module.
AT+IPR="<baud rate>"
ERROR
Check that the specified
baud rate is within the range
of supported baud rates.