45 lines
1.2 KiB
ReStructuredText
45 lines
1.2 KiB
ReStructuredText
PCF8574 I/O Expander
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====================
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The PCF8574 component allows you to use PCF8574 and PCF8575 I/O port expanders with many of
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esphomelib's components. With most components, you are able to specify GPIOOutputPin or
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GPIOInputPin for internal pins. The PCF8574 component subclasses those types.
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Example Usage
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-------------
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.. code-block:: cpp
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auto *pcf8574 = App.make_pcf8574_component(0x21);
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App.make_gpio_binary_sensor("PCF pin 0 sensor", pcf8574->make_input_pin(0, PCF8574_INPUT));
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App.make_gpio_binary_sensor("PCF pin 0 sensor", 0);
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App.make_gpio_switch("PCF pin 1 switch", pcf8574->make_output_pin(1));
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auto *out = App.make_gpio_output(pcf8574->make_output_pin(2));
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App.make_binary_light("PCF pin 2 light", out);
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.. cpp:namespace:: esphomelib
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See :cpp:func:`Application::make_pcf8574_component`.
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API Reference
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-------------
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.. cpp:namespace:: nullptr
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.. doxygenenum:: PCF8574GPIOMode
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.. doxygenclass:: io::PCF8574Component
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:members:
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:protected-members:
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:undoc-members:
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.. doxygenclass:: io::PCF8574GPIOInputPin
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:members:
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:protected-members:
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:undoc-members:
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.. doxygenclass:: io::PCF8574GPIOOutputPin
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:members:
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:protected-members:
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:undoc-members:
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