Specifications

8.6 Basic operations
Followings are examples of some AT commands. Please refer to the AT command document for a full description.
Note: Issue AT+CMEE=1 to have extended error code (+CME ERROR)
Description
AT commands Modem response
Comments
Network
registration
checking
AT+CREG? CREG=<mode>,1 Modem registered to the network
CREG=<mode>,2 Registration lost, re-registration attempt
CREG=<mode>,0
Modem not registered on the network, no
registration attempt
Receiving signal
strength
AT+CSQ +CSQ:20,0
The first parameter has to be at least 15 for
normal communication
Receiving an
incoming call
RING An incoming call is waiting
ATA OK Answer the call
Make a call ATD1234567; OK
Communication established (Don’t forget the
“;” at the end for “voice” call)
+CME ERROR: 11 PIN code not entered (with +CME=1 mode)
+CME ERROR: 3
AOC credit exceeded or a communication is
already established
Make an
emergency call
ATD 112; OK
Communication established (Don’t forget the
“;” at the end for “voice” call)
Communication
loss
NO CARRIER
Hang up ATH OK
Enter PIN code AT+CPIN=1234 OK PIN Code accepted
+CME ERROR: 16 Incorrect PIN code (with +CME=1 mode)
+CME ERROR: 3 PIN already entered (with +CME=1 mode)
Saves parameters
in non-volatile
memory
AT&W OK The configuration settings are stored
8.7 Failsafe factory reinstall using USB Binary Update Tool
In case your modem firmware is crash or can’t be flash via Serial port, Maestro Wireless can provide a binary update
tool using USB, please contact [e-mail] to receive those files.
Confidential, the whole document is the sole property of Maestro Wireless Solutions ltd.
[e-mail]
33