Dave Williams | DitroniX | G8PUO
33 lines
767 B
Markdown
33 lines
767 B
Markdown
# TCA6408 ESPHome Component
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Full-featured custom component for the **TCA6408** 8-bit I²C I/O Expander.
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## Features
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- 8 bidirectional GPIO pins
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- Hardware polarity inversion (inputs)
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- **Interrupt-driven** inputs (active-low)
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- Polling fallback
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- Cached GPIO expander (efficient)
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- Works on ESP32 (incl. C5), ESP8266, etc.
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## Installation
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Copy the `tca6408` folder into your ESPHome project's `custom_components/` directory.
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## Basic Configuration
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```yaml
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i2c:
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sda: GPIO4
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scl: GPIO5
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scan: true
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custom_components:
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- source:
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type: local
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path: custom_components/tca6408
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tca6408:
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- id: tca6408_hub
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address: 0x20 # 0x20–0x27 depending on ADDR pins
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interrupt_pin: GPIO6 # Recommended for responsive inputs |