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22 lines
798 B
Markdown
22 lines
798 B
Markdown
# Parameter `IO4`
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Default Value: `built-in-led disabled 10 false false`
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!!! Warning
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This is an **Expert Parameter**! Only change it if you understand what it does!
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## Description
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This parameter can be used to configure the GPIO `IO4` pin.
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!!! Warning
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This pin is only usable with restrictions!
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By default, it is used for build-in flash light (onboard LED).
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Parameters:
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- `GPIO 4 state`: One of `built-in-led`, `input`, `input pullup`, `input pulldown` or `output`.
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- `GPIO 4 use interrupt`: Enable interrupt trigger
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- `GPIO 4 PWM duty resolution`: LEDC PWM duty resolution in bit
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- `GPIO 4 enable MQTT`: Enable MQTT publishing/subscribing
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- `GPIO 4 enable HTTP`: Enable HTTP write/read
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- `GPIO 4 name`: MQTT topic name (empty = `GPIO4`). Allowed characters: `a-z, A-Z, 0-9, _, -`.
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