AT Commands Reference Guide
80529ST10815A Rev.2– 2017-09-14
ReproductionforbiddenwithoutTelitCommunicationsS.p.A.writtenauthorization‐AllRightsReserved page109of233
#GPIO - General Purpose Input/Output Pin Control
<mode> - its meaning depends on <dir> setting:
0 - if <dir>=0 – INPUT, remove any Pull-up/Pull-down
- output pin cleared to 0 (Low) if <dir>=1 - OUTPUT
1 - if <dir>=0 – INPUT, if <dir>=0 – INPUT, remove any
Pull-up/Pull-down
- output pin set to 1 (High) if <dir>=1 - OUTPUT
2 - Reports the read value from the input pin if
<dir>=0 – INPUT
- Reports the read value from the input pin if
<dir>=1 - OUTPUT
Note: Reports a no meaning value if ALTERNATE FUNCTION
3 - if <dir>=0 – INPUT, enable Pull-Up
4 - if <dir>=0 – INPUT, enable Pull-Down
<dir> - GPIO pin direction
0 - pin direction is INPUT
1 - pin direction is OUTPUT
2,3,4,5,6,7,8,9 - pin direction is Alternate Function ALT1, ALT2, ALT3, ALT4, ALT5,
ALT6, ALT7,ALT8 respectively this direction.
<save> - GPIO pin save configuration
0 – pin configuration is not saved
1 – pin configuration is saved
Note: when <save> is omitted the configuration is stored
Note: when <mode>=2 (and <dir> is omitted) the command reports the direction and
value
of pin GP
IO<pi
n> in t
he form
at:
#GPIO: <dir>,<stat>
where:
<dir>
- current direction setting for the GPIO<pin>
<stat> - logic value read from pin GPIO<pin> in the case the pin <dir> is set to input;
logic value present in output of the pin GPIO<pin> in the case the pin <dir> is
currently set to output;
no meaning value for the pin GPIO<pin> in the case the pin <dir> is set to alternate
function or Tristate pull down.
Note:
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