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60 lines
1.7 KiB
ReStructuredText
TCA9548A I²C Multiplexer
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========================
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.. seo::
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:description: Instructions for setting up TCA9548A I²C multiplexer in ESPHome.
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:image: tca9548a.jpg
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The TCA9548A component allows you to use TCA9548A as a I²C multiplexer
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(`datasheet <https://www.ti.com/lit/ds/symlink/tca9548a.pdf>`__,
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`AdaFruit`_) in ESPHome. It uses :ref:`I²C Bus <i2c>` for communication.
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Once configured, you can use any of the 8 channels (TCA9548A) as separated channels for your projects.
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Every Channel acts for all connected components as a virtual I²C Bus.
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.. figure:: images/tca9548a.jpg
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:align: center
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:width: 80.0%
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tca9548a I2C Multiplexer.
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.. _AdaFruit: https://learn.adafruit.com/adafruit-tca9548a-1-to-8-i2c-multiplexer-breakout
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.. code-block:: yaml
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# Example configuration entry
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tca9548a:
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- address: 0x70
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id: multiplex0
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i2c_id: i2c0
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channels:
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- bus_id: multiplex0channel0
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channel: 0
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- bus_id: multiplex0channel1
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channel: 1
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# Individual I2C Devices
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sensor:
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- platform: bmp280
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i2c_id: multiplex0channel1
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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 TCA9548A component.
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- **address** (*Optional*, int): The I²C address of the Multiplexer.
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Defaults to ``0x70``.
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- **i2c_id** (*Optional*): The I²C Bus ID
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Defaults to ``false``
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- **channels** (*Optional*): The I²C Bus Channels
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- **bus_id** (**Required**, :ref:`config-id`): The id to use for this virtual I2C Bus.
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- **channel** (**Required**): The channel (0-7) to use for this virtual I2C Bus.
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See Also
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--------
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- :ref:`i2c`
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- :ghedit:`Edit`
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