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AI-on-the-edge-device-docs/param-docs/parameter-pages/GPIO/IO4.md
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Parameter IO4

Default Value: built-in-led disabled 10 false false

!!! Warning This is an Expert Parameter! Only change it if you understand what it does!

This parameter can be used to configure the GPIO IO4 pin.

!!! Warning This pin is only usable with restrictions! By default, it is used for build-in flash light (onboard LED).

Parameters:

  • GPIO 4 state: One of built-in-led, input, input pullup, input pulldown or output.
  • GPIO 4 use interrupt: Enable interrupt trigger
  • GPIO 4 PWM duty resolution: LEDC PWM duty resolution in bit
  • GPIO 4 enable MQTT: Enable MQTT publishing/subscribing
  • GPIO 4 enable HTTP: Enable HTTP write/read
  • GPIO 4 name: MQTT topic name (empty = GPIO4). Allowed characters: a-z, A-Z, 0-9, _, -.