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# TCA6408 ESPHome Component
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Full-featured custom component for the **TCA6408** 8-bit I²C I/O Expander.
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Full-featured custom component for the **TCA6408** 8-bit I²C I/O Expander.
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**This is work in progress and under test**
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## Features
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- Polling fallback mode
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- Compatible with ESP32 (including C3/C5/C6), ESP8266, etc.
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The INT pin on TCA6408 is open-drain active-low — connect a pull-up resistor (or use internal pull-up on ESP).
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The INT pin on TCA6408 is open-drain active-low — connect a pull-up resistor (or use internal pull-up on ESP).
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## Installation
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tca6408:
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- id: tca6408_hub
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address: 0x20 # Default: 0x20 (0x20–0x27 depending on ADDR pins)
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address: 0x20 # Default: 0x20 (0x20–0x27 depending on ADDR pins)
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interrupt_pin: GPIO6 # Recommended for fast input response
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## Example: Outputs (Switches)
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