esphome-docs/components/fan/hbridge.rst
2024-08-14 02:48:47 +00:00

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H-bridge Fan
============
.. seo::
:description: Instructions for setting up hbridge controlled fans (or motors).
:image: fan.svg
The ``hbridge`` fan platform allows you to use a compatible *h-bridge* (L298N, DRV8871, MX1508, BTS7960, L9110S, DRV8833, TB6612, etc.) to control a fan (or motor/solenoid).
.. figure:: images/L298N_module.jpg
:align: center
:target: `kuongshun`_
:width: 50.0%
L298N H-bridge module. Image by `kuongshun`_.
.. _kuongshun: https://kuongshun.com/products/l298n-stepper-motor-driver-board-red
.. figure:: images/fan-ui.png
:align: center
:width: 80.0%
.. code-block:: yaml
# Example configuration entry
fan:
- platform: hbridge
id: my_fan
name: "Living Room Fan"
pin_a: motor_forward_pin
pin_b: motor_reverse_pin
# enable_pin: motor_enable
decay_mode: slow # slow decay mode (coasting) or fast decay (braking).
Configuration variables:
------------------------
- **pin_a** (**Required**, :ref:`config-id`): The id of the
:ref:`float output <output>` connected to Pin A (alternatively IN1, etc.) of the h-bridge.
- **pin_b** (**Required**, :ref:`config-id`): The id of the
:ref:`float output <output>` connected to Pin B (alternatively IN2, etc.) of the h-bridge.
- **enable_pin** (*Optional*, :ref:`config-id`): The id of the
:ref:`float output <output>` connected to the Enable pin of the h-bridge (if h-bridge uses enable).
- **decay_mode** (*Optional*, string): The decay mode you want to use with
the h-bridge. Either ``slow`` (coasting) or ``fast`` (braking). Defaults to ``slow``.
- **speed_count** (*Optional*, int): Set the number of supported discrete speed levels. The value is used
to calculate the percentages for each speed. E.g. ``2`` means that you have 50% and 100% while ``100``
will allow 1% increments in the output. Defaults to ``100``.
- **preset_modes** (*Optional*): A list of preset modes for this fan. Preset modes can be used in automations (i.e. `on_preset_set`).
- All other options from :ref:`Fan Component <config-fan>`.
.. _fan-hbridge_brake_action:
``fan.hbridge.brake`` Action
----------------------------
Set all h-bridge pins high, shorting the fan/motor's windings and forcing the motor to actively stop.
.. code-block:: yaml
on_...:
then:
- fan.hbridge.brake: my_fan
See Also
--------
- :doc:`/components/output/index`
- :doc:`/components/fan/index`
- :doc:`/components/output/ledc`
- :doc:`/components/output/esp8266_pwm`
- :apiref:`fan/fan_state.h`
- `Adafruit's excellent H-bridge tutorial <https://learn.adafruit.com/improve-brushed-dc-motor-performance>`__
- :ghedit:`Edit`