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196 lines
5.7 KiB
ReStructuredText
196 lines
5.7 KiB
ReStructuredText
EZO sensor circuits
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===================
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.. seo::
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:description: Instructions for setting up EZO sensor circuits in esphome
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:image: ezo-ph-circuit.png
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:keywords: ezo ph ec rtd sensor circuit esphome
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The ``ezo`` sensor platform allows you to use your EZO sensor circuits with
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ESPHome. The :ref:`I²C Bus <i2c>` is
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required to be set up in your configuration for this sensor to work.
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All embedded solutions from EZO can be found `here <https://atlas-scientific.com/embedded-solutions/>`__.
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If a certain command is not supported directly, it can be executed with the ``send_custom()`` method call.
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.. figure:: images/ezo-ph-circuit.png
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:align: center
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:width: 80.0%
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.. code-block:: yaml
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# Example configuration entry
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sensor:
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- platform: ezo
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id: ph_ezo
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address: 99
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unit_of_measurement: "pH"
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update_interval: 10s
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- platform: ezo
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id: rtd_ezo
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name: "RTD Temperature"
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address: 102
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accuracy_decimals: 2
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unit_of_measurement: "°C"
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update_interval: 10s
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Configuration variables:
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------------------------
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- **address** (**Required**, int): Specify the I²C address of the sensor.
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- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the
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sensor. Defaults to ``60s``.
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- **id** (*Optional*, :ref:`config-id`): Set the ID of this sensor for use in lambdas.
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- All other options from :ref:`Sensor <config-sensor>`.
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Automation triggers:
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- **on_led** (*Optional*, :ref:`Action <config-action>`): Triggered when the result of ``get_led_state()`` is ready. The LED
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state is provided as a boolean variable named ``x``.
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- **on_device_information** (*Optional*, :ref:`Action <config-action>`): Triggered when the result of ``get_device_information()``
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is ready. The result is provided as a ``std::string`` variable named ``x``.
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- **on_slope** (*Optional*, :ref:`Action <config-action>`): Triggered when the result of ``get_slope()`` is ready. The result
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is provided as a ``std::string`` variable named ``x``.
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- **on_calibration** (*Optional*, :ref:`Action <config-action>`): Triggered when the result of ``get_calibration()`` is ready.
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The result is provided as a ``std::string`` variable named ``x``.
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- **on_t** (*Optional*, :ref:`Action <config-action>`): Triggered when the result of ``get_t()`` is ready. The result is provided
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as a ``std::string`` variable named ``x``.
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- **on_custom** (*Optional*, :ref:`Action <config-action>`): Triggered when the result of ``get_custom()`` is ready. The result is provided as a ``std::string`` variable named ``x``.
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.. _ezo_lambda_calls:
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Lambda calls
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------------
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From :ref:`lambdas <config-lambda>`, you can interact with the sensor in various ways. For any ``get`` command a trigger will be called
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with the information retrieved from the sensor. For more information on the command specifics, refer to the datasheet.
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- ``set_i2c(uint8_t address)``: Set I2C address of the device, must be an integer between 1 and 127
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.. code-block:: cpp
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id(ph_ezo).set_i2c(100);
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- ``get_device_information()``: Sensor retrieves calibration and triggers ``on_device_information:`` once done
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.. code-block:: cpp
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id(ph_ezo).get_device_information();
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- ``set_sleep()``: Put the device to sleep
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.. code-block:: cpp
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id(ph_ezo).set_sleep();
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- ``get_state()``: Performs a read on the current sensor.
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.. code-block:: cpp
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id(ph_ezo).get_state();
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- ``get_slope()``: Sensor retrieves slope and triggers ``on_slope:`` once done
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.. code-block:: cpp
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id(ph_ezo).get_slope();
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- ``get_t()``: Sensor retrieves temperature compensation value (in Celcius) and triggers ``on_t:`` once done
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.. code-block:: cpp
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id(ph_ezo).get_t();
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- ``set_t(float value)``: Send the given temperature (in Celcius) to the sensor.
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.. code-block:: cpp
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id(ph_ezo).set_t("27.00");
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- ``set_tempcomp_value(float temp)``: Send the given temperature (in Celcius) to the sensor (this is an alias of `set_t()` for backwards compatibility)
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.. code-block:: cpp
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id(ph_ezo).set_tempcomp_value(id(rtd_ezo).state);
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- ``get_calibration()``: Sensor retrieves calibration and triggers ``on_calibration:`` once done
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.. code-block:: cpp
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id(ph_ezo).get_calibration();
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- ``set_calibration_generic(float value)``: Sets the calibration with no point.
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.. code-block:: cpp
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id(ph_ezo).set_calibration_generic(750.0);
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- ``set_calibration_point_low(float value)``: Sets the low calibration point.
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.. code-block:: cpp
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id(ph_ezo).set_calibration_point_low(4.00);
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- ``set_calibration_point_mid(float value)``: Sets the medium calibration point.
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.. code-block:: cpp
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id(ph_ezo).set_calibration_point_mid(7.00);
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- ``set_calibration_point_high(float value)``: Sets the high calibration point.
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.. code-block:: cpp
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id(ph_ezo).set_calibration_point_high(10.00);
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- ``clear_calibration()``: Clears all calibration points.
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.. code-block:: cpp
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id(ph_ezo).clear_calibration();
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- ``get_led_state()``: Sensor LED state and triggers ``on_led:`` once done
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.. code-block:: cpp
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id(ph_ezo).get_led_state();
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- ``set_led_state(bool on)``: Sensor LED on or off
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.. code-block:: cpp
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id(ph_ezo).set_led_state(true);
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- ``send_custom(const std::string &payload, uint16_t delay_ms = 300, bool response_expected = false)``: Runs a custom command. This sends exactly what is in ``payload``. Optionally you can set a ``delay`` and if a response is expected that should be parsed. Defaults to ``false`` for custom commands. Triggers ``on_custom:`` if there's a response.
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.. code-block:: cpp
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// Run a custom command to turn on the LED
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id(ph_ezo).send_custom("L,1");
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See Also
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--------
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- :ref:`sensor-filters`
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- :apiref:`ezo/ezo.h`
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- :ghedit:`Edit`
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