Recommended Timeout Mechanism For At Commands Processed By A Host - Huawei MU609 Application Manual

HUAWEI MU609 HSPA LGA Module
Application Guide
Example:
AT+COPS=1,2,23415
OK
Some commands can be executed when SIM card is inserted. MU609 would return
to SIM failure if SIM card is not inserted. For more information, see Property
Description of related AT in the latest version of MU609 V100R002 of
MU609 HSPA LGA Module AT Command Interface
Example:
AT+CREG?
+CME ERROR: SIM failure
Note：
1.3.3 Recommended Timeout Mechanism for AT Commands
Processed by a Host
A module processes AT commands in series. Do not send another AT command
before the result for the current command is returned or the current command times
out (except when the current command is an abortive AT command). The following
table lists AT command timeout durations (starting from the time when an AT
command arrives at a port).
Table 1-1 AT command timeout duration
AT Command
General AT commands
AT+CMSS/AT+CMGS (used to send text
messages)
AT+COPS=? (used to search for networks)
After an AT command times out, it is recommended that the host check whether the
module is functioning normally. The following procedure is provided for your
reference:
Issue 02 (2013-09-18)
SIM failure indicates that SIM card is not inserted.
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Before the results ofAT+COPS
is returned, enter any characters
(such as "AT"), the module will
terminate the processing of
AT+COPS and return OK. The
entered characters are used to
abort the command only
Specification.
Timeout Duration
30s
60s
120s
Overview
.
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