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Dave Williams | DitroniX | G8PUO
2026-06-13 10:01:44 +01:00
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components/TCA6408/README.md
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# TCA6408 ESPHome Component # TCA6408 ESPHome Component
Full-featured custom component for the **TCA6408** 8-bit I²C I/O Expander. Full-featured custom component for the **TCA6408** 8-bit I²C I/O Expander.
**This is work in progress and under test**
## Features ## Features
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- Polling fallback mode - Polling fallback mode
- Compatible with ESP32 (including C3/C5/C6), ESP8266, etc. - Compatible with ESP32 (including C3/C5/C6), ESP8266, etc.
The INT pin on TCA6408 is open-drain active-low — connect a pull-up resistor (or use internal pull-up on ESP). The INT pin on TCA6408 is open-drain active-low — connect a pull-up resistor (or use internal pull-up on ESP).
## Installation ## Installation
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tca6408: tca6408:
- id: tca6408_hub - id: tca6408_hub
address: 0x20 # Default: 0x20 (0x20–0x27 depending on ADDR pins) address: 0x20 # Default: 0x20 (0x20–0x27 depending on ADDR pins)
interrupt_pin: GPIO6 # Recommended for fast input response interrupt_pin: GPIO6 # Recommended for fast input response
## Example: Outputs (Switches) ## Example: Outputs (Switches)