esphome-docs/esphomeyaml/components/dallas.rst
2019-01-06 18:56:14 +01:00

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Dallas Temperature Component
============================
.. seo::
:description: Instructions for setting up dallas temperature sensor hubs that can expose many temperature sensors on a single pin using the one wire protocol.
:image: dallas.jpg
:keywords: Dallas, ds18b20, onewire
The ``dallas`` component allows you to use your
`DS18b20 <https://www.adafruit.com/product/374>`__
(`datasheet <https://datasheets.maximintegrated.com/en/ds/DS18B20.pdf>`__)
and similar One-Wire temperature sensors.
To use your dallas sensor, first define a dallas “hub” with a pin and
id, which you will later use to create the sensors. The 1-Wire bus the
sensors are connected to should have an external pullup resistor of
about 4.7KΩ. For this, connect a resistor of *about* 4.7KΩ (values around that like 1Ω will, if you don't have
massively long wires, work fine in most cases) between ``3.3V`` and the data pin.
.. code-block:: yaml
# Example configuration entry
dallas:
- pin: 23
# Individual sensors
sensor:
- platform: dallas
address: 0x1c0000031edd2a28
name: "Livingroom Temperature"
Configuration variables:
------------------------
- **pin** (**Required**, number): The pin the sensor bus is connected to.
- **update_interval** (*Optional*, :ref:`config-time`): The interval that the sensors should be checked.
Defaults to 15 seconds.
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
See Also
--------
- :doc:`sensor/dallas`
- `Arduino DallasTemperature library <https://github.com/milesburton/Arduino-Temperature-Control-Library>`__ by `Miles Burton <https://github.com/milesburton>`__
- :doc:`API Reference </api/sensor/dallas>`
- `Edit this page on GitHub <https://github.com/OttoWinter/esphomedocs/blob/current/esphomeyaml/components/dallas.rst>`__
.. disqus::