User`s guide

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Configuring the Digi Connect Devices
 Serial: The GPIO pin is used for standard serial communication signalling.
Each pin maps to a different serial signal as listed in parentheses next to the pin.
(DCD, CTS, DSR, ...). This is the default setting for all GPIO pins. The default
serial settings for the GPIO pins on a Digi Connect device are as follows.
Depending on the device, there are five or nine pins.
 In: The GPIO pin is used for user-defined signal input from the connected
device to the Digi Connect device. An email notification can be sent when an
input event is signalled, as discussed in "Configure Alarms" on page 93.
 Out: The GPIO pin is used for user-defined signal output from the Digi
Connect device to the connected device.
Additional Implementation Required for Input and Output Choices
Changing the GPIO pin settings from Serial to Input or Output means that you are
completely responsible for implementing how the pins and signals will work, including
developing any applications, signal-handling, and hardware.
Pin Number Default Serial Signal Signal Direction
GPIO 1 DCD Input
GPIO 2 CTS Input
GPIO 3 DSR Input
GPIO 4 RTS Output
GPIO 5 DTR Output
GPIO 6 TXD Output
GPIO 7 RXD Input
GPIO 8 TXD for port 2 Output
GPIO 9 RXD for port 2 Input