mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-08-16 21:53:10 +02:00
74 lines
2.6 KiB
ReStructuredText
74 lines
2.6 KiB
ReStructuredText
MH-Z19 CO_2 and Temperature Sensor
|
|
==================================
|
|
|
|
The ``mhz19`` sensor platform allows you to use MH-Z19 CO_2 and temperature sensors
|
|
(`refspace`_) with esphomelib.
|
|
|
|
.. figure:: images/mhz19-full.jpg
|
|
:align: center
|
|
:width: 50.0%
|
|
|
|
MH-Z19 CO_2 and Temperature Sensor.
|
|
|
|
.. _refspace: https://revspace.nl/MHZ19
|
|
|
|
As the communication with the MH-Z19 is done using UART, you need
|
|
to have an :ref:`UART bus <uart>` in your configuration with the ``rx_pin`` connected to the TX pin of the
|
|
MH-Z19 and the ``tx_pin`` connected to the RX Pin of the MH-Z19 (it's switched because the
|
|
TX/RX labels are from the perspective of the MH-Z19). Additionally, you need to set the baud rate to 9600.
|
|
|
|
.. code:: yaml
|
|
|
|
# Example configuration entry
|
|
uart:
|
|
rx_pin: D0
|
|
tx_pin: D1
|
|
baud_rate: 9600
|
|
|
|
sensor:
|
|
- platform: mhz19
|
|
co2:
|
|
name: "MH-Z19 CO2 Value"
|
|
temperature:
|
|
name: "MH-Z19 Temperature"
|
|
update_interval: 15s
|
|
|
|
Configuration variables:
|
|
------------------------
|
|
|
|
|
|
- **co2** (**Required**): The CO_2 data from the sensor in parts per million (ppm).
|
|
|
|
- **name** (**Required**, string): The name for the CO_2 sensor.
|
|
- **id** (*Optional*, :ref:`config-id`): Set the ID of this sensor for use in lambdas.
|
|
- All other options from :ref:`Sensor <config-sensor>` and :ref:`MQTT Component <config-mqtt-component>`.
|
|
|
|
- **temperature** (**Required**): The information for the temperature sensor. Please note that this is
|
|
not officially documented in the datasheet and seems to be quite inaccurate.
|
|
|
|
- **name** (**Required**, string): The name for the temperature sensor.
|
|
- **id** (*Optional*, :ref:`config-id`): Set the ID of this sensor for use in lambdas.
|
|
- All other options from :ref:`Sensor <config-sensor>` and :ref:`MQTT Component <config-mqtt-component>`.
|
|
|
|
- **update_interval** (*Optional*, :ref:`config-time`): The interval to check the
|
|
sensor. Defaults to ``15s``. See :ref:`sensor-default_filter`.
|
|
|
|
- **uart_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the :ref:`UART Component <uart>` if you want
|
|
to use multiple UART buses.
|
|
|
|
.. figure:: images/mhz19-pins.jpg
|
|
:align: center
|
|
:width: 80.0%
|
|
|
|
Pins on the MH-Z19. Only the ones marked with a red circle need to be connected.
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :ref:`sensor-filters`
|
|
- `MH-Z19 library <https://github.com/nara256/mhz19_uart>`__ by `@nara356 <https://github.com/nara256>`__
|
|
- :doc:`API Reference </api/sensor/mhz19>`
|
|
- `Edit this page on GitHub <https://github.com/OttoWinter/esphomedocs/blob/current/esphomeyaml/components/sensor/mhz19.rst>`__
|
|
|
|
.. disqus::
|