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76 lines
2.6 KiB
ReStructuredText
76 lines
2.6 KiB
ReStructuredText
Dallas Temperature Sensor
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=========================
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The ``dallas`` sensor allows you to define sensors for you `dallas
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sensor hub </esphomeyaml/components/dallas.html>`__.
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To initialize a sensor, first supply the ``dallas_id`` attribute
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pointing to the dallas hub. Then supply either ``address`` **or**
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``index`` to identify the sensor.
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.. figure:: /esphomeyaml/components/sensor/images/ds18b20-full.jpg
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:align: center
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:target: `Adafruit`_
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:width: 50.0%
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DS18b20 One-Wire Temperature Sensor. Image by `Adafruit`_.
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.. _Adafruit: https://www.adafruit.com/product/374
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|image0|
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.. |image0| image:: /esphomeyaml/components/sensor/images/temperature.png
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:class: align-center
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:width: 80.0%
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.. code:: yaml
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# Example configuration entry
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dallas:
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- id: dallas_hub1
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pin: 23
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# Individual sensors
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sensor:
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- platform: dallas
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dallas_id: "dallas_hub1"
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address: 0x1C0000031EDD2A28
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index: 0
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name: "Living Room Temperature"
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Configuration variables:
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~~~~~~~~~~~~~~~~~~~~~~~~
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- **dallas_id** (**Required**, `id </esphomeyaml/configuration-types.html#id>`__): The ID of the dallas hub.
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- **address** (**Required**, int): The address of the sensor. Use either
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this option or index.
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- **index** (**Required**, int): The index of the sensor starting with 0.
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So the first sensor will for example have index 0. `It’s recommended
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to use address instead <#getting-sensor-ids>`__.
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- **resolution** (*Optional*, int): An optional resolution from 8 to
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12. Higher means more accurate. Defaults to the default for most
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sensors: 12.
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- **id** (*Optional*, `id </esphomeyaml/configuration-types.html#id>`__): Manually specify the ID used for code
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generation.
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- All other options from `Sensor </esphomeyaml/components/sensor/index.html#base-sensor-configuration>`__
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and `MQTT Component </esphomeyaml/components/mqtt.html#mqtt-component-base-configuration>`__.
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Getting Sensor IDs
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~~~~~~~~~~~~~~~~~~
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It is highly recommended to use the ``address`` attribute for creating
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dallas sensors, because if you have multiple sensors on a bus and the
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automatic sensor discovery fails, all sensors indices will be shifted by
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one. In order to get the address, simply start the firmware on your
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device with a configured dallas hub and observe the log output (the `log
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level </esphomeyaml/components/logger>`__ must be set to at least
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``debug``!). You will find something like this:
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|image1|
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Next, individually warm up or cool down the sensors and observe the log
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output to determine which address points to which sensor.
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.. |image1| image:: /esphomeyaml/components/sensor/images/dallas-log.png
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