GPIO AT commands

The following commands list contains AT commands related to the General Purpose Input/Output (GPIO).

Configure GPIO pins function #XGPIOCFG

The #XGPIOCFG command configures the specified GPIO function.

Set command

The set command allows you to list all available GPIO instances.

Syntax

#XGPIOCFG=<op>,<pin>

The <op> parameter indicates the function to be configured. It accepts the following integer values:

  • 0 - Disable GPIO.

  • 1 - Output.

  • 21 - Input using internal pull up register.

  • 22 - Input using internal pull down register.

The <pin> parameter indicates the GPIO pin to be configured. It ranges between 0 and 31.

Example

Configure GPIO pin 2 as output:

AT#XGPIOCFG=1,2
OK

Configure GPIO pin 6 as input pull up:

AT#XGPIOCFG=21,6
OK

Read command

The read command lists any GPIOs configured by the #XGPIOCFG command.

Example

AT#XGPIOCFG?

#XGPIOCFG

1,2

21,6
OK

Test command

The test command is not supported.

Access GPIO pins #XGPIO

The #XGPIO command writes, reads, or toggles GPIO pins state.

Set command

The set command allows you to write, read, or toggle GPIO pins state.

Syntax

#XGPIO=<op>,<pin>[,<value>]

  • The <op> parameter accepts the following integer values:

    • 0 - Write output GPIO state.

    • 1 - Read input GPIO state.

    • 2 - Toggle output GPIO state.

  • The <pin> parameter indicates the GPIO pin to be accessed. It ranges between 0 and 31.

  • The <value> parameter indicates the value to be written to the GPIO pin. It can assume one of the following values:

    • 0 - Logic low

    • 1 - Logic high

Response syntax

Response example when <op> values are write and toggle:

OK

Response example when the <op> value is read:

#XGPIO: <pin>,<value>

Example

Example of a write operation:

AT#XGPIO=0,2,1
OK

Example of a read operation:

AT#XGPIO=1,2

#XGPIO: 2,1

OK

Example of a toggle operation:

AT#XGPIO=2,2
OK

Read command

The read command is not supported.

Test command

The test command is not supported.