Specifications

Smart Machine Smart Decision
SIM900_AT Commands Manual_V1.07 156 2012.12.10
which shows whether the module is currently ready for phone call.
+CCALR: <mode>
OK
Parameter
<mode>
See Test Command
Reference Note
6.2.44 AT+GSV Display Product Identification Information
AT+GSV Display Product Identification Information
Execution
Command
AT+GSV
Response
TA returns product information text
Example:
SIMCOM_Ltd
SIMCOM_SIM900
Revision: 1137B01V01SIM900M32_ST
OK
Reference Note
6.2.45 AT+SGPIO Control the GPIO
AT+SGPIO Control the GPIO
Response
+SGPIO: (0-1),(1-12),(0-2),(0-1)
OK
Test Command
AT+SGPIO=?
Parameters
See Write Command
Response
OK
ERROR
Write Command
AT+SGPIO=
<operation>,<GPI
O>,<function>
,<level>
Parameters
<Operation> 0 Set the GPIO function including the GPIO output and
GPIO as the Keypad.
1 Read the GPIO level. Please note that only when the
gpio is set as input, user can use parameter 1 to read
the GPIO level, otherwise the module will return
"ERROR".