esphome-docs/components/mcp23Sxx.rst

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MCP23Sxx I/O Expander
=====================
.. seo::
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:description: Instructions for setting up MCP23S08, MCP23S16 or MCP23S17 digital port expander in ESPHome. This series features exactly the same API as the MCP230xx I/O Expander (I²C)
:image: mcp230xx.svg
The Microchip MCP23Sxx series of general purpose, parallel I/O expansion for SPI bus applications.
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This series features exactly the same API as the MCP230xx I/O Expander (I²C).
**Supported Variants :**
- :ref:`mcp23S08-label`
- :ref:`mcp23S17-label`
.. _mcp23S08-label:
MCP23S08 Component
------------------
The MCP23S08 component (`datasheet <http://ww1.microchip.com/downloads/en/DeviceDoc/MCP23008-MCP23S08-Data-Sheet-20001919F.pdf>`__,
`Digi-Key <https://www.digikey.com/product-detail/en/microchip-technology/MCP23S08-E-P/MCP23S08-E-P-ND/735954>`__) has 8 GPIOs that can be configured independently.
.. code-block:: yaml
# Example configuration entry
mcp23s08:
- id: 'mcp23s08_hub'
cs_pin: GPIOXX
deviceaddress: 0
# Individual outputs
switch:
- platform: gpio
name: "MCP23S08 Pin #0"
pin:
mcp23xxx: mcp23s08_hub
# Use pin number 0
number: 0
# One of INPUT, INPUT_PULLUP or OUTPUT
mode:
output: true
inverted: false
# Individual inputs
binary_sensor:
- platform: gpio
name: "MCP23S08 Pin #1"
pin:
mcp23xxx: mcp23s08_hub
# Use pin number 1
number: 1
# One of INPUT or INPUT_PULLUP
mode:
input: true
inverted: false
Configuration variables:
************************
- **id** (**Required**, :ref:`config-id`): The id to use for this MCP23S08 component.
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- **cs_pin** (**Required**, int): The SPI chip select pin to use
- **deviceaddress** (*Optional*, int): The address of the chip.
Defaults to ``0``.
- **open_drain_interrupt** (*Optional*, boolean): Configure interrupt pins to open-drain mode.
Useful when the MCP23S08's power supply is greater than 3.3 volts. Note that these pins
will require pull-up resistors (to 3.3 volts) when this mode is enabled.
Pin Configuration Variables:
****************************
- **mcp23xxx** (**Required**, :ref:`config-id`): The id of the MCP23S08 component.
- **interrupt** (*Optional*): Set this pin to trigger the INT pin on the component. Can be one of ``CHANGE``, ``RISING``, ``FALLING``.
- All other options from :ref:`Pin Schema <config-pin_schema>`
.. _mcp23S17-label:
MCP23S17 Component
------------------
The MCP23S17 component allows you to use MCP23S17 I/O expanders
(`datasheet <http://ww1.microchip.com/downloads/en/DeviceDoc/20001952C.pdf>`__,
`Digi-Key <https://www.digikey.com/product-detail/en/microchip-technology/MCP23S17-E-SP/MCP23S17-E-SP-ND/894276>`__) in ESPHome.
It uses the :ref:`SPI Bus <spi>` for communication.
Once configured, you can use any of the 16 pins as
pins for your projects. Within ESPHome they emulate a real internal GPIO pin
and can therefore be used with many of ESPHome's components such as the GPIO
binary sensor or GPIO switch.
.. code-block:: yaml
# Example configuration entry
mcp23s17:
- id: 'mcp23s17_hub'
cs_pin: GPIOXX
deviceaddress: 0
# Individual outputs
switch:
- platform: gpio
name: "MCP23S17 Pin #0"
pin:
mcp23xxx: mcp23s17_hub
# Use pin number 0
number: 0
mode:
output: true
inverted: false
# Individual inputs
binary_sensor:
- platform: gpio
name: "MCP23S17 Pin #1"
pin:
mcp23xxx: mcp23s17_hub
# Use pin number 1
number: 1
# One of INPUT or INPUT_PULLUP
mode:
input: true
pullup: true
inverted: false
Configuration variables:
************************
- **id** (**Required**, :ref:`config-id`): The id to use for this MCP23S17 component.
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- **cs_pin** (**Required**, int): The SPI chip select pin to use.
- **deviceaddress** (*Optional*, int): The address of the chip.
Defaults to ``0``.
- **open_drain_interrupt** (*Optional*, boolean): Configure interrupt pins to open-drain mode.
Useful when the MCP23S17's power supply is greater than 3.3 volts. Note that these pins
will require pull-up resistors (to 3.3 volts) when this mode is enabled.
Pin Configuration Variables:
****************************
- **mcp23xxx** (**Required**, :ref:`config-id`): The id of the MCP23S17 component.
- **interrupt** (*Optional*): Set this pin to trigger the port INT pin on the component. Can be one of ``CHANGE``, ``RISING``, ``FALLING``.
- All other options from :ref:`Pin Schema <config-pin_schema>`
See Also
--------
- :ref:`spi`
- :doc:`switch/gpio`
- :doc:`binary_sensor/gpio`
- :apiref:`API Reference (MCP23S08) <mcp23S08/mcp23S08.h>`
- :apiref:`API Reference (MCP23S17) <mcp23S17/mcp23S17.h>`
- :ghedit:`Edit`