17.3. Read Command
-- Retrieves the Current Settings Used for Certain Tasks
A
read operation retrieves the current settings used by the GSM/GPRS
modem or mobile phone for certain tasks. The syntax is:
command?
where
command is an AT command.
When an AT command is used in the above syntax to perform a read
operation, it is called a read command. The read operation is
supported by all AT commands that are capable of the set operation.
Here
is an example that illustrates how to use a read command. The AT
command +CSCA (command name in
text: Service Centre Address) is used to set the SMSC (SMS center)
address for sending SMS messages. It takes two parameters that
specify the SMSC address and type of address. Suppose you set the
SMSC address to +85291234567 in Microsoft HyperTerminal, like this:
AT+CSCA="+85291234567",145
OK
After
that, if you enter the read command "+CSCA?", the GSM/GPRS
modem or mobile phone will return the SMSC address and type of
address that you set in the previous step:
AT+CSCA?
+CSCA:
"+85291234567",145
OK
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