Digi TS 8 MEI User Manual page 94

Additional implementation required for input and output choices
Changing the GPIO pin settings from Serial to Input or Output means you are responsible for
implementing how the pins and signals will work, including developing any applications, signal-
handling, and hardware.
Set alarms for GPIO pin changes, as needed
To issue alarms in the form of email notifications or SNMP traps when a GPIO pin signals that an
event has occurred on the Digi device, go to the Alarms page and configure those alarms. See
"Alarms" on page 95.
Test GPIO pins
Once the GPIO pins and any alarms associated with them have been configured, test the GPIO pins
to make sure they work as desired.
Test GPIO input
Typically, input signals on GPIO pins are used to trigger an email alarm, which tells an
administrator or technician that a significant event has occurred within the device. To test GPIO
input:
On the SW2 bank of switches on the development board, ensure that one of the GPIO pins is
1
set to High.
On the SW1 bank of switches, set the same GPIO pin to IO.
2
Configure the GPIO pin for input. See "GPIO pins" on page 93.
3
Configure an email alarm for the GPIO pin. See "Alarms" on page 95.
4
Toggle the SW2 switch several times to generate several email alarms.
5
Test GPIO output
To test GPIO output, a GPIO signal from the configuration application is raised that in turn causes
an LED on the development board to turn on.
On the SW2 bank of switches on the development board, make sure that one of the GPIO pins
1
is set to High.
On the SW1 bank of switches, set the same GPIO pin to IO.
2
In the web interface for the Digi device, click the GPIO link. On the GPIO page, configure
3
one or more GPIO pins for output. See "GPIO pins" on page 93 for details.
4 Under Administration, click the System Information link. On the System Information
page, click the GPIO link.
5 Choose Asserted to raise the signal, and then click Set Pins.
An LED on the development board is turned on.
Note that this process does not configure the Digi device. Settings are not saved. If the
module reboots, perform steps 2 and 3 again.
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