
Part 5 – GPIO AT Commands
Universal IP AT Commands Reference Guide 93
Stack
Function: The desired stack function to be specified on a GPIO trigger. The stack function must be
properly configured; i.e., for a sendmail function, all proper sendmail items must be configured.
Values: 0 - Disabled (The GPIO will not trigger)
1 - #SENDMAIL1
2 - #SENDMAIL2
3 - #SENDMAIL3
4 - #PUTMAIL
5 - #GETMAIL
6 - #LTCPSTART=1
7 - #OTCP=1
8 - #OUDP=1
9 - #LUDPSTART=1
Hangup: Determines whether to disconnect from the network after GPIOs have been processed.
Values: 0 - Physical connection disconnects when all GPIOs have been processed
1 - Physical connection stays connected.
2 - Physical connection disconnects when all GPIOs have been processed; suppress
responses
3 - Physical connection stays connected; suppress responses
Default: 1,1,0,0,0,0,x
2,1,0,0,0,0,x
3,0,0,0,0,0,x
4,0,0,0,0,0,x
5,3,0,0,0,0,x
Note: The final number (represented by ‘x’) is variable and not supported at this time.
Example: AT#GPIO=1,0,1,180,1,0
GPIO 1 would be configured as a Digital Input with internal pullup (0).
A positive voltage will trigger the GPIO (1).
A Debounce time of 180 ms (180) will be used.
#SENDMAIL1 will be called if the GPIO triggers (1).
After processing the GPIO, the physical connection will be disconnected (0) and all responses
will be printed to the user.
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