FARGO electronic maestro 1800 Benutzerhandbuch

Confidential, the whole present document is the sole property of Fargo Telecom (Asia) Ltd.

17

5. I/O TRIGGERED  AT COMMAND

This feature making use of the Fargo Maestro Input/Output port as a sensor. If the signal to the port
match the pre-defined condition a stored AT command will be executed.

User can use AT+IOAT command to set the condition and store AT command to be executed.

1.  When the I/O port is connected to high 3V signal,

 Switch closed   : logic level high
 Switch opened : logic level low.

2.  The switch can be placed as a triggering device, e.g. to detect door opening.

3.  According to the setting of AT+IOAT command, the stored AT command will be executed either

I/O signal from high to low, or from low to high :

When set as low-to-high triggering:

I/O port

I/O port volatge

time = T

Start counting time when
a low to  high signal
changed detected

when period of high signal
reach the Threshold value
the AT command will be
executed