Add INA226 current/power monitor (#403)

* Docs update

* Docs update

* Docs update


Co-authored-by: Sergio Muñoz <sergio@iMac-de-Sergio.local>

components/sensor/ina226.rst

@@ -0,0 +1,69 @@
+INA226 DC current and power sensor
+==================================
+
+.. seo::
+    :description: Instructions for setting up INA226 DC current and power sensors
+    :image: ina226.jpg
+    :keywords: ina226
+
+The ``ina226`` sensor platform allows you to use your INA226 DC Current and Power Sensor
+(`datasheet <http://www.ti.com/lit/ds/symlink/ina226.pdf>`__,
+`eBay`_) sensors with
+ESPHome. The :ref:`I²C Bus <i2c>` is
+required to be set up in your configuration for this sensor to work.
+
+
+.. figure:: images/ina226-full.jpg
+    :align: center
+    :width: 50.0%
+
+    INA226 DC Current and Power Sensor.
+
+.. _eBay: https://www.ebay.com/sch/i.html?_nkw=INA226
+
+.. code-block:: yaml
+
+    # Example configuration entry
+    sensor:
+      - platform: ina226
+        address: 0x40
+        shunt_resistance: 0.1 ohm
+        current:
+          name: "INA226 Current"
+        power:
+          name: "INA226 Power"
+        bus_voltage:
+          name: "INA226 Bus Voltage"
+        shunt_voltage:
+          name: "INA226 Shunt Voltage"
+        max_current: 3.2A
+        update_interval: 60s
+
+Configuration variables:
+------------------------
+
+- **address** (*Optional*, int): Manually specify the i^2c address of the sensor. Defaults to ``0x40``.
+- **shunt_resistance** (*Optional*, float): The value of the shunt resistor on the board for current calculation.
+  Defaults to ``0.1 ohm``.
+- **max_current** (*Optional*, float): The maximum current you are expecting. ESPHome will use this to
+  configure the sensor optimally. Defaults to ``3.2A``.
+- **current** (*Optional*): Use the current value of the sensor in amperes. All options from
+  :ref:`Sensor <config-sensor>`.
+- **power** (*Optional*): Use the power value of the sensor in watts. All options from
+  :ref:`Sensor <config-sensor>`.
+- **bus_voltage** (*Optional*): Use the bus voltage (voltage of the high side contact) value of the sensor in V.
+  All options from :ref:`Sensor <config-sensor>`.
+- **shunt_voltage** (*Optional*): Use the shunt voltage (voltage across the shunt resistor) value of the sensor in V.
+  All options from :ref:`Sensor <config-sensor>`.
+- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``.
+
+
+See Also
+--------
+
+- :ref:`sensor-filters`
+- :doc:`ina219`
+- :doc:`ina3221`
+- :apiref:`ina226/ina226.h`
+- `INA226 Arduino Library <https://github.com/SV-Zanshin/INA226>`__
+- :ghedit:`Edit`

index.rst

@@ -116,6 +116,7 @@ Sensor Components
     Home Assistant, components/sensor/homeassistant, home-assistant.svg
     HX711, components/sensor/hx711, hx711.jpg
     INA219, components/sensor/ina219, ina219.jpg
+    INA226, components/sensor/ina226, ina226.jpg
     INA3221, components/sensor/ina3221, ina3221.jpg
     Integration, components/sensor/integration, sigma.svg
     HTU21D, components/sensor/htu21d, htu21d.jpg