User manual

Confidential, the whole present document is the sole property of Maestro Wireless Solution Ltd.
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11.2. AT command for configuring AT command by SMS
11.2.1. AT+SMSAT command
Command Syntax
AT+SMSAT=<mode>(,<key>)
Response syntax:
+SMSAT: <mode>,<key>
Command
Possible responses:
AT+SMSAT=0
OK
Note : disable remote AT command by SMS
AT+SMSAT =1
OK
Enable remote AT command by SMS
AT+SMSAT?
+SMSAT : 1,000000
OK
Note display current status
AT+SMSAT=2,123456
OK
Note: set the <key> value
AT+SMSAT =?
+SMSAT : (0-2),(6)
OK
Note : possible argument
Defined Values:
<mode>
0 disable remote AT command by SMS
1 enable remote AT command by SMS
2 change the value of the <key>
<key>
A 6-digit numeric character key from 000000 to 999999. Only incoming SMS with the first 6 characters matching with this
key will be treated as a valid source of remote AT command.
11.3. Limitation and caution to be taken when using remote AT command
This feature will not ‘judge’ the result of executing the command, so care has to be taken not to enter improper command
that make the modem becoming out of control:
1. Never send ‘interactive’ AT command by SMS, e.g. AT+CMGS=…. This feature cannot return the prompt to the
sender for second input
2. Always wait for the return SMS with AT responses before you send another SMS AT command.
3. It could be in some case (e.g. network failure) the modem cannot return response SMS. The modem will try sending
response SMS for three times max. If still not successful it will abort.
4. Always think twice before you send AT command by SMS. For example if you send AT+CPOF it will turn off the
modem, and you need to go to access the modem to reset it.
5. Some MSP AT commands can be sent over SMS. See Chapter 22.