FARGO electronic Maestro 900 - Manual (Page 20)

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When set as high-to-low triggering :
* See AT+IOAT command on setting Threshold value T.
5.2 AT command for configuring I/O triggered AT command
5.2.1 AT+IOAT
Command Syntax
AT+IOAT=<action>(,<dir>,<Threshold>,<cmd> )
Response syntax:
+SMSAT: <action>,<dir>,<Threshold>,<cmd>
Command Possible responses:
AT+IOAT=0 OK
Note : disable I/O triggered AT command execution
AT+IOAT =1 OK
Enable remote I/O triggered AT command execution
AT+ IOAT? +IOAT : 1,1, 10,”AT+CMSS=5”
OK
Note display current status
AT+IOAT=2,1,10,”AT+IPR=115200” OK
Note: set the parameters < dir>, <Threshold>, <cmd>
low-to-high triggering, Threshold=1000 ms
command is “AT+IPR=115200”
AT+ IOAT =? +IOAT : (0-2),(0-1),(1-50),(128)
OK
Note : possible argument
Defined Values:
<action>
0 disable I/O triggered AT command execution
1 enable I/O triggered AT command execution
2 configure I/O triggered AT command parameters
<dir>
0 configure as low-to-high triggering
1 configure as high-to-low triggering
I/O port voltage
time = T
Start counting time when
a high to low signal
changed detected when period of low signal
reach Threshold value the
AT command will be
executed