mirror of
https://github.com/esphome/esphome-docs.git
synced 2024-12-28 17:48:35 +01:00
8d9b0d2375
* Netlify * Fix * Faster doxygen * Update Makefile * Try without api * Debug * Fix * Update Makefile * Debug * Try 1.8.13 * Remove debug * Update Makefile * Optimize
96 lines
3.4 KiB
ReStructuredText
96 lines
3.4 KiB
ReStructuredText
Nextion TFT LCD Display
|
|
=======================
|
|
|
|
.. seo::
|
|
:description: Instructions for setting up Nextion TFT LCD displays
|
|
:image: nextion.jpg
|
|
|
|
.. warning::
|
|
|
|
This integration is experimental as I don't have the hardware to test it (yet).
|
|
If you can verify it works (or if it doesn't), notify me on `discord <https://discord.gg/KhAMKrd>`__.
|
|
|
|
The ``nextion`` display platform allows you to use Nextion LCD displays (`datasheet <https://nextion.itead.cc/resources/datasheets/>`__,
|
|
`iTead <https://www.itead.cc/display/nextion.html>`__)
|
|
with esphomelib.
|
|
|
|
.. figure:: images/nextion-full.jpg
|
|
:align: center
|
|
:width: 75.0%
|
|
|
|
Nextion LCD Display.
|
|
|
|
As the communication with the MH-Z19 is done using UART, you need to have an :ref:`UART bus <uart>`
|
|
in your configuration with ``rx_pin`` both the ``tx_pin`` set to the respective pins on the display.
|
|
Additionally, you need to set the baud rate to 9600.
|
|
|
|
.. code-block:: yaml
|
|
|
|
# Example configuration entry
|
|
uart:
|
|
rx_pin: D0
|
|
tx_pin: D1
|
|
baud_rate: 9600
|
|
|
|
|
|
display:
|
|
- platform: nextion
|
|
lambda: |-
|
|
it.set_component_value("gauge", 50);
|
|
it.set_component_text("textview", "Hello World!");
|
|
|
|
Configuration variables:
|
|
------------------------
|
|
|
|
- **uart_id** (*Optional*, :ref:`config-id`): The ID of the :ref:`UART bus <uart>` you wish to use for this display.
|
|
Use this if you want to use multiple UART buses at once.
|
|
- **lambda** (*Optional*, :ref:`lambda <config-lambda>`): The lambda to use for rendering the content on the nextion display.
|
|
See :ref:`display-nextion_lambda` for more information.
|
|
- **update_interval** (*Optional*, :ref:`config-time`): The interval to call the lambda to update the display.
|
|
Defaults to ``5s``.
|
|
- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
|
|
|
|
.. _display-nextion_lambda:
|
|
|
|
Rendering Lambda
|
|
----------------
|
|
|
|
With Nextion displays, a dedicated chip on the display itself does the whole rendering. esphomelib can only
|
|
send *instructions* to the display to tell it *how* to render something and *what* to render.
|
|
|
|
First, you need to use the `Nextion Editor <https://nextion.itead.cc/resources/download/nextion-editor/>`__ to
|
|
create a display file and insert it using the SD card slot. Then, in the rendering ``lambda``, you have 3 main methods
|
|
you can call to populate data on the display:
|
|
|
|
.. code-block:: yaml
|
|
|
|
display:
|
|
- platform: nextion
|
|
# ...
|
|
lambda: |-
|
|
// set the "value" of a component - value is always an integer
|
|
// for example gauges represent their status using integers from 0 to 100
|
|
it.set_component_value("gauge", 50);
|
|
|
|
// set the text of a component
|
|
it.set_component_text("textview", "Hello World!");
|
|
|
|
// set the text of a component with formatting
|
|
it.set_component_text_printf("textview", "The uptime is: %.1f", id(uptime_sensor).state);
|
|
|
|
|
|
Please see :ref:`display-printf` for a quick introduction into the ``printf`` formatting rules and
|
|
:ref:`display-strftime` for an introduction into the ``strftime`` time formatting.
|
|
|
|
|
|
See Also
|
|
--------
|
|
|
|
- :doc:`index`
|
|
- :apiref:`display/nextion.h`
|
|
- `Simple Nextion Library <https://github.com/bborncr/nextion>`__ by `Bentley Born <https://github.com/bborncr>`__
|
|
- `Official Nextion Library <https://github.com/itead/ITEADLIB_Arduino_Nextion>`__ by `iTead <https://www.itead.cc/>`__
|
|
- :ghedit:`Edit`
|
|
|
|
.. disqus::
|