mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-11-10 10:11:29 +01:00
60 lines
1.7 KiB
ReStructuredText
60 lines
1.7 KiB
ReStructuredText
TCA9548A I²C Multiplexer
|
|
========================
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up TCA9548A I²C multiplexer in ESPHome.
|
|
:image: tca9548a.jpg
|
|
|
|
The TCA9548A component allows you to use TCA9548A as a I²C multiplexer
|
|
(`datasheet <https://www.ti.com/lit/ds/symlink/tca9548a.pdf>`__,
|
|
`AdaFruit`_) in ESPHome. It uses :ref:`I²C Bus <i2c>` for communication.
|
|
|
|
Once configured, you can use any of the 8 channels (TCA9548A) as separated channels for your projects.
|
|
Every Channel acts for all connected components as a virtual I²C Bus.
|
|
|
|
|
|
.. figure:: images/tca9548a.jpg
|
|
:align: center
|
|
:width: 80.0%
|
|
|
|
tca9548a I2C Multiplexer.
|
|
|
|
.. _AdaFruit: https://learn.adafruit.com/adafruit-tca9548a-1-to-8-i2c-multiplexer-breakout
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Example configuration entry
|
|
tca9548a:
|
|
- address: 0x70
|
|
id: multiplex0
|
|
i2c_id: i2c0
|
|
channels:
|
|
- bus_id: multiplex0channel0
|
|
channel: 0
|
|
- bus_id: multiplex0channel1
|
|
channel: 1
|
|
|
|
# Individual I2C Devices
|
|
sensor:
|
|
- platform: bmp280
|
|
i2c_id: multiplex0channel1
|
|
|
|
Configuration variables:
|
|
~~~~~~~~~~~~~~~~~~~~~~~~
|
|
|
|
- **id** (**Required**, :ref:`config-id`): The id to use for this TCA9548A component.
|
|
- **address** (*Optional*, int): The I²C address of the Multiplexer.
|
|
Defaults to ``0x70``.
|
|
- **i2c_id** (*Optional*): The I²C Bus ID
|
|
Defaults to ``false``
|
|
- **channels** (*Optional*): The I²C Bus Channels
|
|
|
|
- **bus_id** (**Required**, :ref:`config-id`): The id to use for this virtual I2C Bus.
|
|
- **channel** (**Required**): The channel (0-7) to use for this virtual I2C Bus.
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :ref:`i2c`
|
|
- :ghedit:`Edit`
|