mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-08-30 00:09:40 +02:00
178 lines
7.1 KiB
ReStructuredText
178 lines
7.1 KiB
ReStructuredText
.. _nextion_sensor:
|
|
|
|
Nextion Sensor Component
|
|
========================
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up Nextion sensor.
|
|
:image: nextion.jpg
|
|
|
|
The ``nextion`` sensor platform supports integers or floats (Xfloat). It can be a component, a variable or a waveform in the Nextion display.
|
|
It is best to set the component's vscope to global in the Nextion Editor. This way the component will be available
|
|
if the page is shown or not.
|
|
|
|
.. note::
|
|
|
|
The Nextion can receive an integer but it can only send 3 bytes for a negative integer. The range if using the :ref:`nextion_custom_sensor_protocol` is:
|
|
-16777215 to 4294967295
|
|
|
|
See :doc:`/components/display/nextion` for setting up the display
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Example configuration entry
|
|
display:
|
|
- platform: nextion
|
|
id: nextion1
|
|
# ...
|
|
|
|
sensor:
|
|
- platform: nextion
|
|
name: "Current Humidity"
|
|
component_name: humidity # pageX.humidity for a global
|
|
precision: 1
|
|
update_interval: 4s
|
|
- platform: nextion
|
|
nextion_id: nextion1
|
|
name: "Current Temperature"
|
|
variable_name: temperature
|
|
- platform: nextion
|
|
id: s01
|
|
component_id: 2
|
|
wave_channel_id: 0
|
|
wave_max_value: 100
|
|
waveform_send_last_value: "true"
|
|
wave_max_length: 400
|
|
update_interval: 1s
|
|
- platform: nextion
|
|
id: s02
|
|
component_id: 2
|
|
wave_channel_id: 1
|
|
wave_max_value: 100
|
|
update_interval: 1s
|
|
|
|
Configuration variables:
|
|
------------------------
|
|
|
|
- **name** (**Required**, string): The name of the sensor.
|
|
- **nextion_id** (*Optional*, :ref:`config-id`): Manually specify the ID of the Nextion display.
|
|
- **component_name** (*Optional*, string): Manually specify the name of the Nextion component.
|
|
- **variable_name** (*Optional*, string): Manually specify the name of the Nextion variable.
|
|
- **update_interval** (*Optional*, :ref:`config-time`): The duration to update the sensor
|
|
- **precision** (*Optional*, int): This is for Nextion float components. This sets
|
|
the precision that the component is set to. This typically is the ``vvs1`` setting of the component.
|
|
- **background_color** (*Optional*, :ref:`config-color`): The background color
|
|
- **foreground_color** (*Optional*, :ref:`config-color`): The foreground color
|
|
- **visible** (*Optional*, boolean): Visible or not
|
|
|
|
Waveform Settings
|
|
*****************
|
|
- **wave_channel_id** (*Optional*, int): The waveform ID in a range of 0-3
|
|
- **wave_max_value** (*Optional*, int): The max value. Set ``dis`` to the height of the component in the Nextion editor
|
|
and this to the max value that will be sent. This will set up the proper scaling.
|
|
- **waveform_send_last_value** (*Optional*, int): This will send the last value set during an update interval. Setting to true will give a timeseries style graph
|
|
- **wave_max_length** (*Optional*, int): How many data points to store. Typically this is the width of the component in the Nextion
|
|
- **update_interval** (*Optional*, :ref:`config-time`): The duration to update the sensor. This typically should be set for waveforms to send periodic updates.
|
|
|
|
- All other options from :ref:`Sensor <config-sensor>`.
|
|
|
|
**Only one** *component_name* **or** *variable_name* **can be set**
|
|
|
|
.. note::
|
|
|
|
``background_color`` , ``foreground_color`` and ``visible`` do not retain their state on page change. :ref:`Sensor Settings<nextion_sensor_settings>`.
|
|
A :ref:`Nextion Sensor <nextion_sensor>` with a custom protocol sending the current page can be used to execute the API call :ref:`Update Components By Prefix <update_components_by_prefix>` to update all the components for that page
|
|
|
|
|
|
See :ref:`nextion_sensor_how_things_update` for additional information
|
|
|
|
Globals
|
|
*******
|
|
The Nextion does not retain data on Nextion page changes. Additionally if a page is changed and the **component_name** does not exist on that page then
|
|
nothing will be updated. To get around this the Nextion components can be changed to have a vscope of ``global``. If this is set then the **component_name**
|
|
should be prefixed with the page name (page0/page1 or whatever you have changed it to).
|
|
|
|
*Example*
|
|
|
|
``component_name: page0.humidity``
|
|
|
|
.. _nextion_sensor_lambda_calls:
|
|
|
|
Lambda Calls
|
|
************
|
|
|
|
From :ref:`lambdas <config-lambda>`, you can call several methods to access
|
|
some more advanced functions (see the full :apiref:`nextion/sensor/nextion_sensor.h` for more info).
|
|
|
|
.. _nextion_sensor_set_state:
|
|
|
|
- ``set_state(bool value, bool publish, bool send_to_nextion)``: Set the state to **value**. Publish the new state to HASS. Send_to_Nextion is to publish the state to the Nextion.
|
|
|
|
.. _nextion_sensor_update:
|
|
|
|
- ``update()``: Poll from the Nextion
|
|
|
|
.. _nextion_sensor_settings:
|
|
|
|
- ``set_background_color(Color color)``: Sets the background color to **Color**
|
|
- ``set_foreground_color(Color color)``: Sets the background color to **Color**
|
|
- ``set_visible(bool visible)`` : Sets visible or not. If set to false, no updates will be sent to the component
|
|
|
|
|
|
.. _nextion_sensor_how_things_update:
|
|
|
|
How things Update
|
|
-----------------
|
|
A Nextion component with an integer value (.val) or Nextion variable will be automatically polled if **update_interval** is set.
|
|
To have the Nextion send the data you can use the :ref:`nextion_custom_sensor_protocol` for this. Add the :ref:`nextion_custom_sensor_protocol` to the
|
|
component or function you want to trigger the send. Typically this is in *Touch Press Event* but some components, like a slider, should have it
|
|
set in the *Touch Release Event* to capture all the changes. Since this is a custom protocol it can be sent from anywhere (timers/functions/components)
|
|
in the Nextion.
|
|
|
|
.. note::
|
|
|
|
There is no need to check the *Send Component ID* for the *Touch Press Event* or *Touch Release Event*
|
|
since this will be sending the real value to esphome.
|
|
|
|
Using the above yaml example:
|
|
- "Current Humidity" will poll the Nextion for the ``humidity.val`` value and set the sensor accordingly.
|
|
- "Current Temperature" will NOT poll the Nextion. Either the Nextion will need to use the :ref:`nextion_custom_sensor_protocol` or use a lambda:
|
|
|
|
- :ref:`Lambda Calls <nextion_sensor_lambda_calls>`.
|
|
|
|
.. note::
|
|
|
|
No updates will be sent to the Nextion if it is sleeping. Once it wakes, the components will be updated. If a component is invisible, :code:`visible(false)`, then it won't update until it is set to be visible.
|
|
|
|
|
|
.. _nextion_custom_sensor_protocol:
|
|
|
|
Nextion Custom Sensor Protocol
|
|
------------------------------
|
|
All lines are required
|
|
|
|
.. code-block:: c++
|
|
|
|
printh 91
|
|
prints "temperature",0
|
|
printh 00
|
|
prints temperature.val,0
|
|
printh FF FF FF
|
|
|
|
*Explanation*
|
|
|
|
- ``printh 91`` Tells the library this is a sensor (int) data
|
|
- ``prints "temperature",0`` Sends the name that matches **component_name** or **variable_name**
|
|
- ``printh 00`` Sends a NULL
|
|
- ``prints temperature.val,0`` The actual value to send. For a variable use the Nextion variable name ``temperature`` with out ``.val``
|
|
- ``printh FF FF FF`` Nextion command ack
|
|
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :doc:`/components/display/nextion`
|
|
- :doc:`index`
|
|
- :apiref:`nextion/sensor/nextion_sensor.h`
|
|
- :ghedit:`Edit`
|