Specifications

AT Command Set Reference
Ver. 1.00
GSM1308AT001 Page 234 Ver. 1.00 – 10/29/2008
4.4.5. $IOPULEN GPIO Pullup Enable
Command Function This command allows the user to enable
the built-in pullup / pulldown capability of
the modem for each GPIO signal. The
pullup / pulldown direction is determined by
the $IOPULUP command.
Command Functional Enfora Specific
Group
Command Format Query AT$IOPULEN=?
Response $IOPULEN: 20 0s – 20 1s
OK
Write Format AT$IOPULEN=<enable>
Response OK
Read Format AT$ IOPULEN?
Response $ IOPULEN: < enable >
OK
Execution Format N/A
Response N/A
Parameter Values
< enable > 0 => Pull-up Disabled.
1 => Pull-up Enabled.
Reference N/A
Standard Scope Optional
Enfora Implementation Scope Full
Notes 20 Digits where left bit represents GPIO 1
and right most bit represents GPIO 20.
GPIO_2 (2
nd
bit from the left) does not
support pullup feature and will always be
displayed as ‘x’ on a query.