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268 lines
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ReStructuredText
268 lines
12 KiB
ReStructuredText
Feedback Cover
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==============
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.. seo::
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:description: Instructions for setting up feedback covers in ESPHome.
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The ``feedback`` cover platform allows you to create covers with position control that
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can optionally have feedback from sensors to detect the fully-open and fully-closed states (endstops),
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and from sensors to detect actual movement (opening/closing). In all the cases the current
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position is approximated with the time the cover has been moving in a direction.
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It supports *open*, *close*, *stop* and *toggle* actions. Tilt control is not supported.
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.. figure:: images/more-info-ui.png
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:align: center
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:width: 50.0%
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.. code-block:: yaml
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# Example configuration entry
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cover:
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- platform: feedback
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name: "Gate"
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open_action:
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- switch.turn_on: open_cover_switch
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open_duration: 2.1min
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open_endstop: open_endstop_binary_sensor
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open_sensor: open_movement_binary_sensor
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close_action:
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- switch.turn_on: close_cover_switch
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close_duration: 2min
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close_endstop: close_endstop_binary_sensor
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close_sensor: close_movement_binary_sensor
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stop_action:
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- switch.turn_off: open_cover_switch
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- switch.turn_off: close_cover_switch
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Use Cases
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---------
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It is a versatile cover that can accommodate for a number of DIY setups, or monitoring an externally controlled cover:
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Time-Based
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**********
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Simplest case, when no sensors are available. The state is thus assumed.
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It is a drop-in replacement of :doc:`/components/cover/time_based`
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Endstop Sensors
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***************
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For cases where there are endstops at one or both ends of the cover to detect the fully-open and fully-closed states.
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When any of these endstops are reached, an actual state is read and updated and the cover optionally
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stopped (via ``stop_action``). The state is not assumed.
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The extension also handles the case where the cover has builtin endstops, which stops the movement, independently to
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the component's logic. In this case, when the cover is fully closed (either if timed based or sensor based) the
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``stop_action`` is not triggered.
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It is a drop-in replacement of :doc:`/components/cover/endstop`.
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Movement Sensors
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****************
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If movement feedback is available, the cover no longer operates in *optimistic mode* (assuming that movement starts
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as soon as an action is triggered) and can also react to commands issued to cover from an external control and still
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keep states in sync (useful for "smartization" of an existing cover).
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When there are no specific endstop sensors, and if the cover has builtin endstops and no external control logic,
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these movement sensors can optionally be use to infer the endstop state.
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When the movement stops (with no stop action being requested) it is assumed that it was caused by
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the builtin endstops, and so the close/open state (according to current direction) was reached.
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This function is activated setting ``infer_endstop`` to True.
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It can be used to replace a :doc:`/components/cover/current_based`, with some modifications in the yaml. See :ref:`migrating_current_based`
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Safety Features
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---------------
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To protect the cover hardware from damage, some safety options are available:
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- *Max duration*, to protect from faulty endstops
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- *Direction change wait time*, like an interlock wait time, to protect motors from sudden direction changes
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- *Obstacle sensors* and *rollback*, possibility to stop and optionally rollback the cover when some external sensors detects an obstacle
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(it might be a sensor for high current consumption or an infrared light detecting an obstruction in the path).
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Configuration variables
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-----------------------
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- **name** (**Required**, string): The name of the cover.
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- **id** (*Optional*, :ref:`config-id`): Manually specify the ID used for code generation.
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- **stop_action** (**Required**, :ref:`Action <config-action>`): The action that should
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be performed when the remote requests the cover to be closed or an endstop is reached.
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Open options:
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- **open_action** (**Required**, :ref:`Action <config-action>`): The action that should
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be performed when the remote requests the cover to be opened.
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- **open_duration** (**Required**, :ref:`config-time`): The amount of time it takes the cover
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to open up from the fully-closed state.
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- **open_endstop** (**Optional**, :ref:`config-id`): The ID of the
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:ref:`Binary Sensor <config-binary_sensor>` that turns on when the open position is reached.
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- **open_sensor** (**Optional**, :ref:`config-id`): The ID of the
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:ref:`Binary Sensor <config-binary_sensor>` that turns on when the cover is moving in the open direction.
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- **open_obstacle_sensor** (**Optional**, :ref:`config-id`): The ID of the
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:ref:`Binary Sensor <config-binary_sensor>` that turns on when an obstacle that blocks the
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open direction is detected.
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Close options:
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- **close_action** (**Required**, :ref:`Action <config-action>`): The action that should
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be performed when the remote requests the cover to be closed.
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- **close_duration** (**Required**, :ref:`config-time`): The amount of time it takes the cover
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to close from the fully-open state.
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- **close_endstop** (**Optional**, :ref:`config-id`): The ID of the
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:ref:`Binary Sensor <config-binary_sensor>` that turns on when the closed position is reached.
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- **close_sensor** (**Optional**, :ref:`config-id`): The ID of the
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:ref:`Binary Sensor <config-binary_sensor>` that turns on when the cover is moving in the close direction.
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- **close_obstacle_sensor** (**Optional**, :ref:`config-id`): The ID of the
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:ref:`Binary Sensor <config-binary_sensor>` that turns on when an obstacle that blocks the
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close direction is detected.
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Additional options:
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- **has_built_in_endstop** (*Optional*, boolean): Indicates that the cover has built in end stop
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detectors. In this configuration the ``stop_action`` is not performed when the open or close
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time is completed and if the cover is commanded to open or close the corresponding actions
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will be performed without checking current state. Defaults to ``false``.
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- **infer_endstop_from_movement** (*Optional*, boolean): Whether to infer endstop state from the movement sensor.
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Requires movement sensors to be set, no endstop sensors and to have builtin endstops. Defaults to ``false``.
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- **assumed_state** (*Optional*, boolean): Whether the true state of the cover is not known.
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This will make the Home Assistant frontend show buttons for both OPEN and CLOSE actions, instead
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of hiding or disabling one of them. Defaults to ``true`` if no sensor is available to known
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the actual state of the cover.
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- **max_duration** (*Optional*, :ref:`config-time`): The maximum duration the cover should be opening
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or closing. Useful for protecting from dysfunctional endstops.
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Requires internal, builtin or inferred endstops.
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- **direction_change_wait_time** (*Optional*, :ref:`config-time`): Stops cover and forces a wait time between changes in direction,
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and takes it into account when computing cover position (useful to protect motors).
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When this option is set (even at 0s) if an open/close action is invoked while the cover is moving in the opposite direction,
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then and intermediate stop action will be invoked to generate the delay.
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- **acceleration_wait_time** (*Optional*, :ref:`config-time`): Considers a wait time needed by the cover to actually
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start moving after command is issued and takes it into account when computing cover position
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(useful for heavy covers with large inertia).
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Intended to not accumulate error when doing multiple partial open/close actions).
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The open/close duration includes one instance of this delay, as it is the total amount of time from
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issuing a command to reaching endstop.
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Defaults to ``0s``.
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- **update_interval** (*Optional*, :ref:`config-time`): The interval
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to publish updated position information to the UI while the cover is moving.
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Defaults to ``1s``.
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- **obstacle_rollback** (*Optional*, percentage): The percentage of rollback the cover will perform in case of
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obstacle detection while moving. Defaults to ``10%``.
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- All other options from :ref:`Cover <config-cover>`.
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Example Configurations
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----------------------
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.. _migrating_current_based:
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Migrating Current-Based Cover
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*****************************
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Most options can be left untouched, but some modifications are needed:
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1. All current sensing related options must be moved to auxiliary :doc:`/components/binary_sensor/analog_threshold`,
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to convert current readings to binary sensors, using the corresponding thresholds and delays.
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If there where any open/close obstacle current threshold defined, a separate binary sensor with that threshold should be defined.
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The option ``start_sensing_delay`` should be directly replaced by a ``delayed_off`` filter in the movement sensors, or alternatively
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hysteresis options could be used to reduce the noise.
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2. To have the very same behavior implicit in current based cover, you must always set ``has_built_in_endstop`` and ``infer_endstop_from_movement``
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to True.
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.. code-block:: yaml
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# Example original sensor configuration
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cover:
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- platform: current_based
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name: "Current Based Cover"
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open_sensor: open_current_sensor
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open_moving_current_threshold: 0.5
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open_obstacle_current_threshold: 0.8
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start_sensing_delay: 0.8s
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# ...rest of options
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# Example converted sensor configuration
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binary_sensor:
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- platform: analog_threshold
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id: open_binary_sensor
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sensor_id: open_current_sensor
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threshold: 0.5
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filters:
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- delayed_off: 0.8s
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- platform: analog_threshold
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id: open_obstacle_binary_sensor
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sensor_id: open_current_sensor
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threshold: 0.8
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# ... repeat for close sensors
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cover:
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- platform: feedback
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name: "Feedback Based Cover"
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has_built_in_endstop: true
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infer_endstop_from_movement: true
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open_sensor: open_binary_sensor
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open_obstacle_sensor: open_obstacle_binary_sensor
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#... rest of options
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3. Malfunction detection is not directly supported by Feedback Cover, as the malfunction was very narrowly defined to a specific use case
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(while in other hardware configurations, the same situation is perfectly valid).
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The malfunction alerted specifically when there was current in the opposite direction of the requested operation (possibly due to a relay welded).
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This detection can still be achieved by putting the logic directly in the switch, (or whatever needed according to your specific use case).
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.. code-block:: yaml
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# Example original malfunction configuration
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cover:
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- platform: current_based
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close_sensor: close_current
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close_action:
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- switch.turn_on: open_relay
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open_sensor: open_current
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open_action:
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- switch.turn_on: open_relay
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malfunction_detection: true
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malfunction_action:
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- logger.log: "Malfunction detected. Relay welded."
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#... rest of options
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# Example converted malfunction configuration
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switch:
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- platform: gpio
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id: open_relay
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#... rest of options
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on_turn_off:
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- delay: 200ms #allow for switching time and any discharge
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- if:
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condition:
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binary_sensor.is_on: open_binary_sensor
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# alternative can check directly
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# on sensor.in_range open_current
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then:
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- logger.log: "Malfunction detected. Relay welded."
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See Also
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--------
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- :doc:`index`
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- :ref:`automation`
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- :apiref:`feedback/feedback_cover.h`
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- :ghedit:`Edit`
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