esphome-docs/components/esphome.rst
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ESPHome Core Configuration
==========================
.. seo::
:description: Instructions for setting up the core ESPHome configuration.
:image: cloud-circle.png
Here you specify some core information that ESPHome needs to create
firmwares. Most importantly, this is the section of the configuration
where you specify the **name** of the node, the **platform** and
**board** youre using.
.. code-block:: yaml
# Example configuration entry
esphome:
name: livingroom
platform: ESP32
board: nodemcu-32s
Configuration variables:
------------------------
- **name** (**Required**, string): This is the name of the node. It
should always be unique to the node and no other node in your system
can use the same name. It can also only contain upper/lowercase
characters, digits and underscores.
- **platform** (**Required**, string): The platform your board is on,
either ``ESP32`` or ``ESP8266``. See :ref:`esphome-arduino_version`.
- **board** (**Required**, string): The board ESPHome should
specify for platformio. For the ESP32, choose the appropriate one
from `this list <http://docs.platformio.org/en/latest/platforms/espressif32.html#boards>`__
and use `this list <http://docs.platformio.org/en/latest/platforms/espressif8266.html#boards>`__
for ESP8266-based boards.
Advanced options:
- **esphome_core_version** (*Optional*): The version of the C++ `ESPHome-Core framework <https://github.com/esphome/esphome-core>`__
to use. See :ref:`esphome-esphome_core_version`.
- **arduino_version** (*Optional*): The version of the arduino framework to link the project against.
See :ref:`esphome-arduino_version`.
- **build_path** (*Optional*, string): Customize where ESPHome will store the build files
for your node. By default, ESPHome puts all platformio project files under a folder ``<NODE_NAME>/``,
but you can customize this behavior using this option.
- **platformio_options** (*Optional*, mapping): Additional options to pass over to platformio in the
platformio.ini file. See :ref:`esphome-platformio_options`.
- **use_custom_code** (*Optional*, boolean): Whether to configure the project for writing custom components.
This sets up some flags so that custom code should compile correctly
- **includes** (*Optional*, list of files): A list of files to include in the main (auto-generated) sketch file
for custom components. The paths in this list are relative to the directory where the YAML configuration file
is in.
- **libraries** (*Optional*, list of libraries): A list of `platformio libraries <https://platformio.org/lib>`__
to include in the project. See `platformio lib install <https://docs.platformio.org/en/latest/userguide/lib/cmd_install.html>`__.
- **board_flash_mode** (*Optional*, string): The `SPI flash mode <https://github.com/espressif/esptool/wiki/SPI-Flash-Modes>`__
to use for the board. One of ``qio``, ``qout``, ``dio`` and ``dout``. Defaults to ``dout``.
Automations:
- **on_boot** (*Optional*, :ref:`Automation <automation>`): An automation to perform
when the node starts. See :ref:`esphome-on_boot`.
- **on_shutdown** (*Optional*, :ref:`Automation <automation>`): An automation to perform
right before the node shuts down. See :ref:`esphome-on_shutdown`.
- **on_loop** (*Optional*, :ref:`Automation <automation>`): An automation to perform
on each ``loop()`` iteration. See :ref:`esphome-on_loop`.
.. _esphome-esphome_core_version:
``esphome_core_version``
------------------------
With the ``esphome_core_version`` parameter you can tell ESPHome which version of the C++ framework
to use when compiling code. For example, you can configure using the most recent (potentially unstable)
version of ESPHome straight from github. Or you can configure the use of a local copy of esphome-core
using this configuration option.
First, you can configure the use of either the latest esphome-core stable release (``latest``),
the latest development code from GitHub (``dev``), or a specific version number (``1.8.0``).
.. code-block:: yaml
# Example configuration entry
esphome:
# ...
# Use the latest ESPHome stable release
esphome_core_version: latest
# Or use the latest code from github
esphome_core_version: dev
# Use a specific version number
esphome_core_version: 1.8.0
Alternatively, if you want to develop for ESPHome, you can download the
`latest code from GitHub <https://github.com/esphome/esphome-core/archive/dev.zip>`__, extract the contents,
and point ESPHome to your local copy. Then you can modify the ESPHome to your needs or to fix bugs.
.. code-block:: yaml
# Example configuration entry
esphome:
# ...
# Use a local copy of ESPHome
esphome_core_version:
local: path/to/esphome-core
And last, you can make ESPHome use a specific branch/commit/tag from a remote git repository:
.. code-block:: yaml
# Example configuration entry
esphome:
# ...
# Use a specific commit/branch/tag from a remote repository
esphome_core_version:
# Repository defaults to https://github.com/esphome/esphome-core.git
repository: https://github.com/esphome/esphome-core.git
branch: master
esphome_core_version:
repository: https://github.com/somebody/esphome-core.git
commit: d27bac9263e8a0a5a00672245b38db3078f8992c
esphome_core_version:
repository: https://github.com/esphome/esphome-core.git
tag: v1.8.0
.. _esphome-arduino_version:
``arduino_version``
-------------------
ESPHome uses the arduino framework internally to handle all low-level interactions like
initializing the WiFi driver and so on. Unfortunately, every arduino framework version often
has its own quirks and bugs, especially concerning WiFi performance. With the ``arduino_version``
option you can tell ESPHome which arduino framework to use for compiling.
.. code-block:: yaml
# Example configuration entry
esphome:
# ...
# Default: use the recommended version, usually this equals
# the latest version.
arduino_version: recommended
# Use the latest stable version
arduino_version: latest
# Use the latest staged version from GitHub, try this if you have WiFi problems
arduino_version: dev
# Use a specific version
arduino_version: 2.3.0
For the ESP8266, you currently can manually pin the arduino version to these values (see the full
list of arduino frameworks `here <https://github.com/esp8266/Arduino/releases>`__):
* `2.4.2 <https://github.com/esp8266/Arduino/releases/tag/2.4.2>`__ (the latest version)
* `2.4.1 <https://github.com/esp8266/Arduino/releases/tag/2.4.1>`__
* `2.4.0 <https://github.com/esp8266/Arduino/releases/tag/2.4.0>`__
For the ESP32, there's currently only one arduino framework version:
`1.0.0 <https://github.com/espressif/arduino-esp32/releases/tag/1.0.0>`__.
.. _esphome-on_boot:
``on_boot``
-----------
This automation will be triggered when the ESP boots up. By default, it is executed after everything else
is already set up. You can however change this using the ``priority`` parameter.
.. code-block:: yaml
esphome:
# ...
on_boot:
priority: -10
# ...
then:
- switch.turn_off: switch_1
Configuration variables:
- **priority** (*Optional*, float): The priority to execute your custom initialization code. A higher value (for example
positive values) mean a high priority and thus also your code being executed earlier. So for example negative priorities
are executed very late. Defaults to ``-10``. Priorities (you can use any value between them too):
- ``100``: This is where all hardware initialization of vital components is executed. For example setting switches
to their initial state.
- ``50.0``: This is where most sensors are set up.
- ``10``: At this priority, WiFi is initialized.
- ``7.5``: MQTT initialization takes place at this priority.
- ``-5.0``: The individual frontend counterparts for the backend components are configured at this priority
- ``-10.0``: At this priority, pretty much everything should already be initialized.
- See :ref:`Automation <automation>`.
.. _esphome-on_shutdown:
``on_shutdown``
---------------
This automation will be triggered when the ESP is about to shut down. Shutting down is usually caused by
too many WiFi/MQTT connection attempts, Over-The-Air updates being applied or through the :doc:`deep_sleep`.
.. note::
It's not guaranteed that all components are in a connected state when this automation is triggered. For
example, the MQTT client may have already disconnected.
.. code-block:: yaml
esphome:
# ...
on_shutdown:
then:
- switch.turn_off: switch_1
Configuration variables: See :ref:`Automation <automation>`.
.. _esphome-on_loop:
``on_loop``
-----------
This automation will be triggered on every ``loop()`` iteration (usually around every 16 milliseconds).
.. code-block:: yaml
esphome:
# ...
on_loop:
then:
# do something
.. _esphome-platformio_options:
``platformio_options``
----------------------
Platformio supports a number of options in its ``platformio.ini`` file. With the ``platformio_options``
parameter you can tell ESPHome what options to pass into the ``env`` section of the platformio file
(Note you can also do this by editing the ``platformio.ini`` file manually).
You can view a full list of platformio options here: https://docs.platformio.org/en/latest/projectconf/section_env.html
.. code-block:: yaml
# Example configuration entry
esphome:
# ...
platformio_options:
upload_speed: 115200
board_build.f_flash: 80000000L
See Also
--------
- :ghedit:`Edit`
.. disqus::