Add docs for TMP117 sensor (#505)

* Add docs for TMP117 sensor

components/sensor/tmp117.rst

@@ -0,0 +1,58 @@
+TMP117 Temperature Sensor
+=========================
+
+.. seo::
+    :description: Instructions for setting up the TMP117 Temperature sensor.
+    :image: tmp117.jpg
+    :keywords: TMP117
+
+The TMP117 Temperature+Humidity sensor allows you to use your TMP117
+(`datasheet <https://www.ti.com/lit/ds/symlink/tmp117.pdf>`__,
+`sparkfun <https://www.sparkfun.com/products/15805>`__)
+sensors with ESPHome.
+
+.. figure:: images/tmp117.jpg
+    :align: center
+    :width: 30.0%
+
+    TMP117 Temperature Sensor.
+    (Credit: `Sparkfun <https://www.sparkfun.com/products/15805>`__, image cropped and compressed)
+
+.. _Sparkfun: https://www.sparkfun.com/products/15805
+
+The TMP117 is a high precision temperature sensor that communicates over I2C. Each sensor is tested on a NIST tracable test setup during Texas Instruments' production process. Accuracy should be at worst 0.1C across the -20C to +50C temperature range.
+
+To use the sensor, first set up an :ref:`I²C Bus <i2c>` and connect the sensor to the specified pins.
+
+If accuracy is a must, see section 8.2.2.2 of the `datasheet <https://www.ti.com/lit/ds/symlink/tmp117.pdf>`__.
+
+.. code-block:: yaml
+
+    # Example configuration entry
+    sensor:
+      - platform: tmp117
+        name: "Living Room Temperature"
+        update_interval: 60s
+
+Configuration variables
+-----------------------
+
+- **name** (**Required**, string): The name for the temperature sensor.
+- **id** (*Optional*, :ref:`config-id`): Set the ID of this sensor for lambdas/multiple sensors.
+- **address** (*Optional*, int): The I²C address of the sensor.
+  See :ref:`I²C Addresses <tmp117_i2c_addresses>` for more information.
+- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``.  The sensor component sets the maximum possible averaging in the sensor based on this.
+
+.. _tmp117_i2c_addresses:
+
+I²C Addresses
+-------------
+
+In order to allow multiple sensors to be connected to the same I²C bus,
+the creators of this sensor hardware have included some options to
+change the i²c address.
+
+-  If the address pin is pulled to GND, the address is ``0x48`` (Default).
+-  If the address pin is pulled to VCC, the address is ``0x49``.
+-  If the address pin is tied to SDA, the address is ``0x4A``.
+-  If the address pin is tied to SCL, the address is ``0x4B``.

index.rst

@@ -149,6 +149,7 @@ Sensor Components
     SGP30, components/sensor/sgp30, sgp30.jpg
     TCS34725, components/sensor/tcs34725, tcs34725.jpg
     Template Sensor, components/sensor/template, description.svg
+    TMP117, components/sensor/tmp117, tmp117.jpg
     Total Daily Energy, components/sensor/total_daily_energy, sigma.svg
     TSL2561, components/sensor/tsl2561, tsl2561.jpg
     Tx20, components/sensor/tx20, tx20.jpg