mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-11-17 11:05:39 +01:00
2af197fe09
Co-authored-by: Solomon <solomon.gorkhover@finnpartners.com> Co-authored-by: Jesse Hills <3060199+jesserockz@users.noreply.github.com>
117 lines
3.6 KiB
ReStructuredText
117 lines
3.6 KiB
ReStructuredText
ADS1118 4-Channel 16-Bit A/D Converter with Internal Temperature Sensor
|
|
=======================================================================
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up ADS1118 multiplexed analog voltage sensors.
|
|
:image: ads1118.jpg
|
|
:keywords: ADS1118
|
|
|
|
.. _ads1118-component:
|
|
|
|
Component/Hub
|
|
-------------
|
|
|
|
ADS1118 4-Channel 16-Bit A/D Converter (`datasheet <https://www.ti.com/lit/ds/symlink/ads1118.pdf>`__)
|
|
The ``ads1118`` domain creates a global hub so that you can later create
|
|
individual sensors using the :ref:`ADS1118 Sensor Platform <ads1118-sensor>`.
|
|
It uses the :ref:`SPI Bus <spi>` for communication.
|
|
|
|
.. figure:: images/ads1118-full.jpg
|
|
:align: center
|
|
:width: 60.0%
|
|
|
|
ADS1118 16-Bit ADC.
|
|
|
|
.. code-block:: yaml
|
|
|
|
ads1118:
|
|
cs_pin: GPIO15
|
|
|
|
Configuration variables:
|
|
************************
|
|
|
|
- **cs_pin** (**Required**, int): The SPI cable select pin to use.
|
|
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID for this ADS1118 Hub. Use this if you
|
|
want to use multiple ADS1118 hubs at once.
|
|
|
|
.. _ads1118-sensor:
|
|
|
|
Sensor
|
|
------
|
|
|
|
The ``ads1118`` sensor allows you to use your ADS1118 delta-sigma ADC
|
|
sensors (`datasheet <https://www.ti.com/lit/ds/symlink/ads1118.pdf>`__) with ESPHome.
|
|
First, setup an :ref:`ADS1118 Hub <ads1118-component>` for your ADS1118 sensor and then use this
|
|
sensor platform to create individual sensors that will report the voltage.
|
|
|
|
.. code-block:: yaml
|
|
|
|
ads1118:
|
|
cs_pin: GPIO15
|
|
sensor:
|
|
- platform: ads1118
|
|
type: 'adc'
|
|
id: 'batt_volt'
|
|
name: "Battery Voltage"
|
|
multiplexer: 'A3_GND'
|
|
gain: 4.096
|
|
update_interval: .01s
|
|
|
|
Configuration variables:
|
|
************************
|
|
|
|
- **type** (*Optional*): ``adc``(default) or ``temperature``
|
|
- **ads1118_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the
|
|
:ref:`ADS1118 Hub <ads1118-component>` you want to use this sensor.
|
|
- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the sensor. Defaults to ``60s``.
|
|
- All other options from :ref:`Sensor <config-sensor>`.
|
|
|
|
ADC Options:
|
|
^^^^^^^^^^^^
|
|
|
|
- **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.
|
|
|
|
Temperature Options:
|
|
^^^^^^^^^^^^^^^^^^^^
|
|
|
|
None
|
|
|
|
Multiplexer and Gain
|
|
--------------------
|
|
|
|
.. note::
|
|
|
|
As per (`datasheet <https://www.ti.com/lit/ds/symlink/ads1118.pdf>`__) Section 7.3 Note 2:
|
|
"No more than VDD + 0.3V must be applied to the analog inputs of the device."
|
|
This means if you power the device with 3.3V, take care not to supply the 4 AIN pins with more than 3.6V.
|
|
|
|
The ADS1118 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 ADS1118 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:`ads1115`
|
|
- :apiref:`ads1118/ads1118.h`
|
|
- :ghedit:`Edit`
|