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104 lines
3.1 KiB
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104 lines
3.1 KiB
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PCA6416A I/O Expander
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=====================
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.. seo::
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:description: Instructions for setting up PCA6416A and PCAL6416A, digital port expanders in ESPHome.
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:image: pca6416a.svg
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The PCA6416A component allows you to use **PCA6416A** or **PCAL6416A** I/O expanders in ESPHome.
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It uses :ref:`I²C Bus <i2c>` for communication.
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Once configured, you can use any of the **16** pins for your projects. Within ESPHome they emulate a real internal
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GPIO pin and can therefore be used with many of ESPHome's components such as the GPIO binary sensor or GPIO switch.
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.. note::
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The 7 bit I²C device address ranges are:
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- PCA6416A: ``0x20`` to ``0x21``
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- PCAL6416A: ``0x20`` to ``0x21``
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For the PCA6416A and PCAL6416A, the actual choice of the I²C device address depends on state of the address pin.
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Please refer to the individual datasheets linked at the bottom of the page for further details to set the address.
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Up to two PCA6416A or PCAL6416A devices can reside on the same I²C bus.
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The PCA6416A and PCAL6416A provide 16 bits of GPIO's (pin numbers 0-15).
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Only the PCAL6416A supports pull-up resistors.
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Any option accepting a :ref:`Pin Schema <config-pin_schema>` can theoretically be used, but some more
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complicated components that do communication through this I/O expander will not work.
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.. code-block:: yaml
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# Example configuration entry
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pca6416a:
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- id: 'pca6416a_device'
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address: 0x20
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# Individual outputs
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switch:
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- platform: gpio
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name: "PCA6416A Pin #0"
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pin:
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pca6416a: pca6416a_device
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# Use pin number 0
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number: 0
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# One of INPUT or OUTPUT
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mode:
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output: true
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inverted: false
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.. code-block:: yaml
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# Example configuration entry
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pca6416a:
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- id: 'pcal6416a_device'
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address: 0x20
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# Individual outputs
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switch:
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- platform: gpio
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name: "PCAL6416A Pin #0"
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pin:
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pca6416a: pcal6416a_device
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# Use pin number 0
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number: 0
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# One of INPUT, INPUT_PULLUP or OUTPUT
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mode:
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input: true
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pullup: true
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inverted: false
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Configuration variables:
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************************
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- **id** (**Required**, :ref:`config-id`): The id to use for this ``pca6416a`` component.
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- **address** (*Optional*, int): The I²C address of the driver.
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Defaults to ``0x20``.
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Pin configuration variables:
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****************************
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- **pca6416a** (**Required**, :ref:`config-id`): The id of the ``pca6416a`` component of the pin.
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- **number** (**Required**, int): The pin number.
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- **inverted** (*Optional*, boolean): If all read and written values
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should be treated as inverted. Defaults to ``false``.
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- **mode** (*Optional*, string): A pin mode to set for the pin at. One of ``INPUT`` or ``OUTPUT``.
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See Also
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--------
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- :ref:`i2c`
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- :doc:`switch/gpio`
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- :doc:`binary_sensor/gpio`
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- `PCA6416A datasheet <https://www.nxp.com/docs/en/data-sheet/PCA6416A.pdf>`__
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- `PCAL6416A datasheet <https://www.nxp.com/docs/en/data-sheet/PCAL6416A.pdf>`__
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- :apiref:`pca6416a/pca6416a.h`
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- :ghedit:`Edit`
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