COBHAM Satcom EXPLORER 540 User & Integrator's Manual page 64

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), see the next sections.
To read the status of 3-GPIO pin (input) with AT commands
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
To activate or deactivate 3-GPIO pin (output) with AT commands
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.
98-148232-K
OK
Chapter 3: Operation
Status of the EXPLORER 540
3-30