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82 lines
2.7 KiB
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82 lines
2.7 KiB
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MCP3204 4-Channel 12-Bit A/D Converter
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======================================
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.. seo::
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:description: Instructions for setting up MCP3204 12-Bit Analog to Digital Converter in ESPHome.
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:keywords: MCP3204
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:image: mcp3204.jpg
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The Microchip Technology Inc. MCP3204
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devices are successive approximation 12-bit Analog-to-Digital (A/D) converters with on-board sample and
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hold circuitry.
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.. figure:: images/mcp3204.jpg
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:align: center
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:width: 50.0%
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.. _mcp3204-component:
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Component/Hub
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-------------
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The MCP3204 component allows you to use MCP3204 4-Channel 12-Bit A/D Converter
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(`datasheet <https://ww1.microchip.com/downloads/en/DeviceDoc/21298e.pdf>`__) in ESPHome.
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It uses the :ref:`SPI Bus <spi>` for communication.
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Once configured, you can use any of the 4 pins as
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sensors for your projects.
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Each pin will respond with a voltage calculated off of the ``reference_voltage`` (default is 3.3V).
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It calculates the voltage by multiplying the ``reference_voltage * value`` on the pin (basically the percentage of VREF)
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Most configurations will set the ``reference_voltage`` = VREF (pin 13 on the chip)
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.. code-block:: yaml
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# Example configuration entry
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mcp3204:
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cs_pin: GPIO15
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reference_voltage: 3.3V
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# Example config of sensors.
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# This is a small 1.5v solar panel power rail attached to pin 0
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# of the MCP3204
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sensor:
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- platform: mcp3204 # Attached to pin 0 of the MCP3204.
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update_interval: 1s
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id: solar_voltage
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number: 0 # MCP3204 pin number
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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 MCP3204 component.
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- **cs_pin** (**Required**, :ref:`Pin Schema <config-pin_schema>`): The SPI cable select pin to use.
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- **reference_voltage** (*Optional*, float): The reference voltage. Defaults to ``3.3V``.
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Sensor
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------
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The ``mcp3204`` sensor allows you to use your MCP3204 12-Bit A/D Converter sensors with ESPHome.
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First, setup a :ref:`MCP3204 Hub <mcp3204-component>` for your MCP3204 sensor and then use this
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sensor platform to create individual sensors that will report the voltage to Home Assistant.
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Configuration variables:
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************************
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- **mcp3204_id** (**Required**, :ref:`config-id`): The id of the parent MCP3204 component.
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- **name** (**Required**, string): The name of the voltage sensor.
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- **number** (**Required**, int): The pin number of the MCP3204
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- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``.
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- All other options from :ref:`Sensor <config-sensor>`.
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See Also
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--------
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- :ref:`spi`
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- :apiref:`mcp3204/mcp3204.h`
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- :ghedit:`Edit`
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