Data Sheet

3. Basic AT Commands

3.2.20. AT+SYSGPIOWRITE—Conﬁgures the Output Level of a GPIO

3.2.21. AT+SYSGPIOREAD—Reads the GPIO Input Level

Example

AT+SYSIOSETCFG=12,3,1󰐇󰐇//Set󰐇GPIO12󰐇to󰐇work󰐇as󰐇a󰐇GPIO

AT+SYSGPIODIR=12,0󰐇󰐇//Set󰐇GPIO12󰐇to󰐇work󰐇as󰐇an󰐇input

Set Command

AT+SYSGPIOWRITE=<pin>,<level>

Response

• If the conﬁguration is successful, the command will return:

OK

• If the IO pin is not in output mode, the command will return:

NOT󰐇OUTPUT!

ERROR

Parameter

• <pin>: GPIO pin number

• <level>: 

‣ 0: low level

‣ 1: high level

Note

Please refer to ESP8266 Pin List for uses of AT+SYSGPIO-related commands.

Example

AT+SYSIOSETCFG=12,3,1󰐇󰐇//Set󰐇GPIO12󰐇to󰐇work󰐇as󰐇a󰐇GPIO

AT+SYSGPIODIR=12,1󰐇󰐇//Set󰐇GPIO12󰐇to󰐇work󰐇as󰐇an󰐇output

AT+SYSGPIOWRITE=12,1󰐇󰐇//Set󰐇GPIO12󰐇to󰐇output󰐇high󰐇level

Set Command

AT+SYSGPIOREAD=<pin>

Response

• If the conﬁguration is successful, the command returns:

+SYSGPIOREAD:<pin>,<dir>,<level>

OK

• If the IO pin is not in GPIO mode, the command will return:

NOT󰐇GPIO󰐇MODE!

ERROR

Parameter

• <pin>: GPIO pin number

• <dir>:

‣ 0: sets the GPIO as an input

‣ 1: sets the GPIO as an output

• <level>:

‣ 0: low level

‣ 1: high level

Espressif

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2017.05