Base class for all switches. More...

#include <switch.h>

Inheritance diagram for esphome::switch_::Switch:

Public Member Functions
	Switch ()

void	publish_state (bool state)
	Publish a state to the front-end from the back-end.

void	control (bool target_state)
	Control this switch using a boolean state value.

void	turn_on ()
	Turn this switch on.

void	turn_off ()
	Turn this switch off.

void	toggle ()
	Toggle this switch.

void	set_inverted (bool inverted)
	Set whether the state should be treated as inverted.

void	add_on_state_callback (std::function< void(bool)> &&callback)
	Set callback for state changes.

optional< bool >	get_initial_state ()
	Returns the initial state of the switch, as persisted previously, or empty if never persisted.

optional< bool >	get_initial_state_with_restore_mode ()
	Returns the initial state of the switch, after applying restore mode rules.

virtual bool	assumed_state ()
	Return whether this switch uses an assumed state - i.e.

bool	is_inverted () const

void	set_restore_mode (SwitchRestoreMode restore_mode)

Public Member Functions inherited from esphome::EntityBase
const StringRef &	get_name () const

void	set_name (const char *name)

bool	has_own_name () const

std::string	get_object_id () const

void	set_object_id (const char *object_id)

uint32_t	get_object_id_hash ()

bool	is_internal () const

void	set_internal (bool internal)

bool	is_disabled_by_default () const

void	set_disabled_by_default (bool disabled_by_default)

EntityCategory	get_entity_category () const

void	set_entity_category (EntityCategory entity_category)

ESPDEPRECATED("Use get_icon_ref() instead for better performance (avoids string copy). Will be removed in ESPHome 2026.5.0", "2025.11.0") std void	set_icon (const char *icon)

StringRef	get_icon_ref () const

uint32_t	get_device_id () const

void	set_device (Device *device)

bool	has_state () const

void	set_has_state (bool state)

uint32_t	get_preference_hash ()
	Get a unique hash for storing preferences/settings for this entity.

Public Member Functions inherited from esphome::EntityBase_DeviceClass
ESPDEPRECATED("Use get_device_class_ref() instead for better performance (avoids string copy). Will be removed in " "ESPHome 2026.5.0", "2025.11.0") std void	set_device_class (const char *device_class)
	Get the device class, using the manual override if set.

StringRef	get_device_class_ref () const
	Get the device class as StringRef.

Data Fields
SwitchRestoreMode	restore_mode {SWITCH_RESTORE_DEFAULT_OFF}
	Indicates whether or not state is to be retrieved from flash and how.

bool	state
	The current reported state of the binary sensor.

Protected Member Functions
virtual void	write_state (bool state)=0
	Write the given state to hardware.

Protected Member Functions inherited from esphome::EntityBase
StringRef	get_object_id_ref_for_api_ () const

void	calc_object_id_ ()

bool	is_object_id_dynamic_ () const
	Check if the object_id is dynamic (changes with MAC suffix)

Protected Attributes
ESPPreferenceObject	rtc_

CallbackManager< void(bool)>	state_callback_ {}

Deduplicator< bool >	publish_dedup_

bool	inverted_ {false}

Protected Attributes inherited from esphome::EntityBase
StringRef	name_

const char *	object_id_c_str_ {nullptr}

const char *	icon_c_str_ {nullptr}

uint32_t	object_id_hash_ {}

Device *	device_ {}

struct esphome::EntityBase::EntityFlags	flags_

Protected Attributes inherited from esphome::EntityBase_DeviceClass
const char *	device_class_ {nullptr}
	Device class override.

Detailed Description

Base class for all switches.

A switch is basically just a combination of a binary sensor (for reporting switch values) and a write_state method that writes a state to the hardware.

Definition at line 39 of file switch.h.

Constructor & Destructor Documentation

◆ Switch()

esphome::switch_::Switch::Switch ( )

explicit

Definition at line 11 of file switch.cpp.

Member Function Documentation

◆ add_on_state_callback()

void esphome::switch_::Switch::add_on_state_callback ( std::function< void(bool)> && callback )

Set callback for state changes.

Parameters

callback The void(bool) callback.

Definition at line 73 of file switch.cpp.

◆ assumed_state()

bool esphome::switch_::Switch::assumed_state ( )

virtual

Return whether this switch uses an assumed state - i.e.

if both the ON/OFF actions should be displayed in Home Assistant because the real state is unknown.

Defaults to false.

Reimplemented in esphome::modbus_controller::ModbusSwitch, and esphome::template_::TemplateSwitch.

Definition at line 71 of file switch.cpp.

◆ control()

void esphome::switch_::Switch::control ( bool target_state )

Control this switch using a boolean state value.

This method provides a unified interface for setting the switch state based on a boolean parameter. It automatically calls turn_on() when state is true or turn_off() when state is false.

Parameters

target_state The desired state: true to turn the switch ON, false to turn it OFF.

Definition at line 13 of file switch.cpp.

◆ get_initial_state()

optional< bool > esphome::switch_::Switch::get_initial_state ( )

Returns the initial state of the switch, as persisted previously, or empty if never persisted.

Definition at line 33 of file switch.cpp.

◆ get_initial_state_with_restore_mode()

optional< bool > esphome::switch_::Switch::get_initial_state_with_restore_mode ( )

Returns the initial state of the switch, after applying restore mode rules.

If restore mode is disabled, this function will return an optional with no value (.has_value() is false), leaving it up to the component to decide the state. For example, the component could read the state from hardware and determine the current state.

Definition at line 43 of file switch.cpp.

◆ is_inverted()

bool esphome::switch_::Switch::is_inverted ( ) const

Definition at line 77 of file switch.cpp.

◆ publish_state()

void esphome::switch_::Switch::publish_state ( bool state )

Publish a state to the front-end from the back-end.

The input value is inverted if applicable. Then the internal value member is set and finally the callbacks are called.

Parameters

state The new state.

Definition at line 57 of file switch.cpp.

◆ set_inverted()

void esphome::switch_::Switch::set_inverted ( bool inverted )

Set whether the state should be treated as inverted.

To the developer and user an inverted switch will act just like a non-inverted one. In particular, the only thing that's changed by this is the value passed to write_state and the state in publish_state. The .state member variable and turn_on/turn_off/toggle remain unaffected.

Parameters

inverted Whether to invert this switch.

Definition at line 76 of file switch.cpp.

◆ set_restore_mode()

void esphome::switch_::Switch::set_restore_mode ( SwitchRestoreMode restore_mode )

inline

Definition at line 121 of file switch.h.

◆ toggle()

void esphome::switch_::Switch::toggle ( )

Toggle this switch.

This is called by the front-end.

For implementing switches, please override write_state.

Definition at line 29 of file switch.cpp.

◆ turn_off()

void esphome::switch_::Switch::turn_off ( )

Turn this switch off.

This is called by the front-end.

For implementing switches, please override write_state.

Definition at line 25 of file switch.cpp.

◆ turn_on()

void esphome::switch_::Switch::turn_on ( )

Turn this switch on.

This is called by the front-end.

For implementing switches, please override write_state.

Definition at line 21 of file switch.cpp.

◆ write_state()

virtual void esphome::switch_::Switch::write_state ( bool state )

protectedpure virtual

Write the given state to hardware.

You should implement this abstract method if you want to create your own switch.

In the implementation of this method, you should also call publish_state to acknowledge that the state was written to the hardware.

Parameters

state The state to write. Inversion is already applied if user specified it.

Implemented in esphome::at581x::RFSwitch, esphome::ble_client::BLEClientSwitch, esphome::copy::CopySwitch, esphome::demo::DemoSwitch, esphome::dfrobot_sen0395::Sen0395LedSwitch, esphome::dfrobot_sen0395::Sen0395PowerSwitch, esphome::dfrobot_sen0395::Sen0395StartAfterBootSwitch, esphome::dfrobot_sen0395::Sen0395UartPresenceSwitch, esphome::factory_reset::FactoryResetSwitch, esphome::gpio::GPIOSwitch, esphome::haier::BeeperSwitch, esphome::haier::DisplaySwitch, esphome::haier::HealthModeSwitch, esphome::haier::QuietModeSwitch, esphome::hbridge::HBridgeSwitch, esphome::homeassistant::HomeassistantSwitch, esphome::ld2410::BluetoothSwitch, esphome::ld2410::EngineeringModeSwitch, esphome::ld2412::BluetoothSwitch, esphome::ld2412::EngineeringModeSwitch, esphome::ld2450::BluetoothSwitch, esphome::ld2450::MultiTargetSwitch, esphome::lvgl::LVGLSwitch, esphome::micronova::MicroNovaSwitch, esphome::modbus_controller::ModbusSwitch, esphome::nextion::NextionSwitch, esphome::opentherm::OpenthermSwitch, esphome::output::OutputSwitch, esphome::pipsolar::PipsolarSwitch, esphome::restart::RestartSwitch, esphome::safe_mode::SafeModeSwitch, esphome::seeed_mr24hpc1::UnderlyOpenFunctionSwitch, esphome::shutdown::ShutdownSwitch, esphome::sprinkler::SprinklerControllerSwitch, esphome::template_::TemplateSwitch, esphome::tm1638::TM1638SwitchLed, esphome::tuya::TuyaSwitch, and esphome::uart::UARTSwitch.

Field Documentation

◆ inverted_

bool esphome::switch_::Switch::inverted_ {false}

protected

Definition at line 142 of file switch.h.

◆ publish_dedup_

Deduplicator<bool> esphome::switch_::Switch::publish_dedup_

protected

Definition at line 141 of file switch.h.

◆ restore_mode

SwitchRestoreMode esphome::switch_::Switch::restore_mode {SWITCH_RESTORE_DEFAULT_OFF}

Indicates whether or not state is to be retrieved from flash and how.

Definition at line 53 of file switch.h.

◆ rtc_

ESPPreferenceObject esphome::switch_::Switch::rtc_

protected

Definition at line 135 of file switch.h.

◆ state

bool esphome::switch_::Switch::state

The current reported state of the binary sensor.

Definition at line 56 of file switch.h.

◆ state_callback_

CallbackManager<void(bool)> esphome::switch_::Switch::state_callback_ {}

protected

Definition at line 138 of file switch.h.

The documentation for this class was generated from the following files:

esphome/components/switch/switch.h
esphome/components/switch/switch.cpp

Public Member Functions

Data Fields

Protected Member Functions

Protected Attributes

Detailed Description

Constructor & Destructor Documentation

◆ Switch()

Member Function Documentation

◆ add_on_state_callback()

◆ assumed_state()

◆ control()

◆ get_initial_state()

◆ get_initial_state_with_restore_mode()

◆ is_inverted()

◆ publish_state()

◆ set_inverted()

◆ set_restore_mode()

◆ toggle()

◆ turn_off()

◆ turn_on()

◆ write_state()

Field Documentation

◆ inverted_

◆ publish_dedup_

◆ restore_mode

◆ rtc_

◆ state

◆ state_callback_