sgp40 (#985)

* sgp40 document

* Updated per PR comments

* Added compensation example

components/sensor/sgp40.rst

@@ -0,0 +1,65 @@
+SGP40 Volatile Organic Compound Sensor
+======================================
+
+.. seo::
+    :description: Instructions for setting up SGP40 Volatile Organic Compound sensor
+    :image: sgp40.jpg
+
+The ``sgp40`` sensor platform  allows you to use your Sensiron SGP40 VOC sensor
+(`datasheet <https://www.sensirion.com/fileadmin/user_upload/customers/sensirion/Dokumente/9_Gas_Sensors/Sensirion_Gas_Sensors_SGP40_Datasheet.pdf>`__) with ESPHome.
+The :ref:`I²C Bus <i2c>` is required to be set up in your configuration for this sensor to work.
+
+.. figure:: images/sgp40.jpg
+    :align: center
+    :width: 80.0%
+
+.. code-block:: yaml
+
+    # Example configuration entry
+    sensor:
+      - platform: sgp40
+        name: "Workshop VOC"
+
+
+Configuration variables:
+------------------------
+
+- **name** (**Required**, string): The name for the CO₂eq sensor.
+- **id** (*Optional*, :ref:`config-id`): Set the ID of this sensor for use in lambdas.
+- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``
+- **store_baseline** (*Optional*, boolean ): Stores and retrieves the baseline infortmation for quicker startups. Defaults to ``True``
+
+- **compensation** (*Optional*): The block containing sensors used for compensation. If not set defaults will be used.
+
+  - **temperature_source** (*Optional*, :ref:`config-id`): Give an external temperature sensor ID
+    here. This can improve the sensor's internal calculations. Defaults to ``25``
+
+  - **humidity_source** (*Optional*, :ref:`config-id`): Give an external humidity sensor ID
+    here. This can improve the sensor's internal calculations. Defaults to ``50``
+
+- All other options from :ref:`Sensor <config-sensor>`.
+
+Example With Compensation
+-------------------------
+.. code-block:: yaml
+
+    # Example configuration entry
+    sensor:
+      - platform: sgp40
+        name: "Workshop VOC"
+        update_interval: 5s        
+        compensation:
+          humidity_source: dht1_temp
+          temperature_source: dht1_hum  
+          
+See Also
+--------
+
+- :ref:`sensor-filters`
+- :doc:`dht`
+- :doc:`dht12`
+- :doc:`hdc1080`
+- :doc:`htu21d`
+- :doc:`sht3xd`
+- :apiref:`sgp40/sgp40.h`
+- :ghedit:`Edit`

cookbook/iaq_board.rst

@@ -53,6 +53,7 @@ See Also
 - :doc:`/components/sensor/pmsx003`
 - :doc:`/components/sensor/mhz19`
 - :doc:`/components/sensor/sgp30`
+- :doc:`/components/sensor/sgp40`
 - :doc:`/components/sensor/tsl2561`
 - :doc:`/components/binary_sensor/gpio`
 - :doc:`/components/sensor/template`

index.rst

@@ -162,6 +162,7 @@ Sensor Components
     SPS30, components/sensor/sps30, sps30.jpg
     STS3X, components/sensor/sts3x, sts3x.jpg
     SGP30, components/sensor/sgp30, sgp30.jpg
+    SGP40, components/sensor/sgp40, sgp40.jpg
     TCS34725, components/sensor/tcs34725, tcs34725.jpg
     Teleinfo, components/sensor/teleinfo, teleinfo.jpg
     Template Sensor, components/sensor/template, description.svg