esphome-docs/components/sensor/ads1115.rst
2019-02-16 23:25:23 +01:00

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ADS1115 Sensor
==============
.. seo::
:description: Instructions for setting up ADS1115 multiplexed analog voltage sensors.
:image: ads1115.jpg
:keywords: ADS1115
The ``ads1115`` sensor allows you to use your ADS1115 sigma-delta ADC
sensors (`datasheet <http://www.ti.com/lit/ds/symlink/ads1115.pdf>`__, `Adafruit`_) with ESPHome.
First, setup a :doc:`ADS1115 Hub </components/ads1115>` for your ADS1115 sensor and then use this
sensor platform to create individual sensors that will report the
voltage to Home Assistant.
.. figure:: images/ads1115-full.jpg
:align: center
:width: 50.0%
ADS1115 16-Bit ADC.
.. _Adafruit: https://www.adafruit.com/product/1085
.. figure:: images/ads1115-ui.png
:align: center
:width: 80.0%
.. code-block:: yaml
ads1115:
- address: 0x48
sensor:
- platform: ads1115
multiplexer: 'A0_GND'
gain: 6.144
name: "ADS1115 Channel A0-GND"
Configuration variables:
------------------------
- **multiplexer** (**Required**): The multiplexer channel of this sensor. Effectively means between which pins you
want to measure voltage.
- **gain** (**Required**, float): The gain of this sensor.
- **name** (**Required**, string): The name for this sensor.
- **ads1115_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the
:doc:`ADS1115 Hub </components/ads1115>` you want to use this sensor.
- **update_interval** (*Optional*, :ref:`config-time`): The interval
to check the sensor. Defaults to ``60s``.
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
Multiplexer And Gain
--------------------
The ADS1115 has a multiplexer that can be configured to measure voltage between several pin configurations. These are:
- ``A0_A1`` (between Pin 0 and Pin 1)
- ``A0_A3`` (between Pin 0 and Pin 3)
- ``A1_A3`` (between Pin 1 and Pin 3)
- ``A2_A3`` (between Pin 2 and Pin 3)
- ``A0_GND`` (between Pin 0 and GND)
- ``A1_GND`` (between Pin 1 and GND)
- ``A2_GND`` (between Pin 2 and GND)
- ``A3_GND`` (between Pin 3 and GND)
Additionally, the ADS1115 has a Programmable Gain Amplifier (PGA) that can help you measure voltages in different ranges, these are:
- ``6.144`` (measures up to 6.144V)
- ``4.096`` (measures up to 4.096V)
- ``2.048`` (measures up to 2.048V)
- ``1.024`` (measures up to 1.024V)
- ``0.512`` (measures up to 0.512V)
- ``0.256`` (measures up to 0.256V)
See Also
--------
- :ref:`sensor-filters`
- :doc:`adc`
- :doc:`max6675`
- :apiref:`sensor/ads1115_component.h`
- `i2cdevlib <https://github.com/jrowberg/i2cdevlib>`__ by `Jeff Rowberg <https://github.com/jrowberg>`__
- :ghedit:`Edit`
.. disqus::