A (hopefully) simple exmple of how to read and write to a Raspberry Pi gpio pins using Home Assistant.
Home Assistant utilizes binary_sensor to READ gpio ports and [switch] (https://home-assistant.io/components/switch/) to SET the state of gpio ports. This does not make intuitive sense when looking at the schematic.
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Hardware
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Wire Breadboard per diagram
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Upload code
Upload yamal files to /config directory -
Restart Home Assistant
Open http://hassio.local:8123/states/group.foo . You should have port_21 sensor and led_1 switch. Toggle led_1 to turn on/off the physical LED.
The physical switch should also toggle the physical LED.
Feel free to remove any sections that aren't applicable to your project.
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