User Manual

Chapter 3: Operation
98-148232-B Control or status with GPIO pin 3 37
• I/O pin 2 (Terminal ready output). If you connect to this pin you can get information on
whether or not the terminal is ready to communicate with connected equipment. See
Power save (Settings) on page 71 and I/O connector (X5) on page 91.
• GPIO pin 3, see next section.
Additionally, until installation is completed you can use the LED to follow the status. See Light
indicator on page 81.
Control or status with GPIO pin 3
The GPIO pin 3 is configurable in the web interface to be input or output, and active low or
active high. You can use the AT command _ITGPIO to activate or deactivate the pin (if
configured as output) or read the status of the pin (if configured as input).
For configuration, see I/O pins (Settings) on page 72.
For specifications, see I/O connector (X5) on page 91.
To read the status of GPIO pin 3 (input)
Do as follows:
1. Configure GPIO pin 3 in the web interface to be input.
2. Send the command _ITGPIO? to the terminal.
3. You get a response saying whether the pin is active or inactive (1 is active, 0 is inactive).
Note that the setting in the web interface determines whether the pin is active high or low.
Example: _ITGPIO: 1
OK
To activate or deactivate GPIO pin 3 (output)
Do as follows:
1. Configure GPIO pin 3 in the web interface to be output.
2. Send the command _ITGPIO=1 (activate) or _ITGPIO=0 (deactivate) to the terminal.
3. You get an OK response when the pin is successfully activated or deactivated.