ESPHomeOTAComponent provides a simple way to integrate Over-the-Air updates into your app using ArduinoOTA. More...

#include <ota_esphome.h>

Inheritance diagram for esphome::ESPHomeOTAComponent:

Public Types
enum class	OTAState : uint8_t { IDLE , MAGIC_READ , MAGIC_ACK , FEATURE_READ , FEATURE_ACK , AUTH_SEND , AUTH_READ , DATA }

Public Member Functions
void	set_auth_password (const std::string &password)

void	set_port (uint16_t port)
	Manually set the port OTA should listen on.

void	setup () override

void	dump_config () override

float	get_setup_priority () const override

void	loop () override

uint16_t	get_port () const

Public Member Functions inherited from esphome::ota::OTAComponent
void	add_state_listener (OTAStateListener *listener)

Public Member Functions inherited from esphome::Component
float	get_actual_setup_priority () const

void	set_setup_priority (float priority)

virtual float	get_loop_priority () const
	priority of loop().

void	call ()

virtual void	on_shutdown ()

virtual void	on_safe_shutdown ()

virtual bool	teardown ()
	Called during teardown to allow component to gracefully finish operations.

virtual void	on_powerdown ()
	Called after teardown is complete to power down hardware.

uint8_t	get_component_state () const

void	reset_to_construction_state ()
	Reset this component back to the construction state to allow setup to run again.

bool	is_in_loop_state () const
	Check if this component has completed setup and is in the loop state.

bool	is_idle () const
	Check if this component is idle.

void	mark_failed ()
	Mark this component as failed.

	ESPDEPRECATED ("Use mark_failed(LOG_STR(\"static string literal\")) instead. Do NOT use .c_str() from temporary " "strings. Will stop working in 2026.6.0", "2025.12.0") void mark_failed(const char *message)

void	mark_failed (const LogString *message)

void	disable_loop ()
	Disable this component's loop.

void	enable_loop ()
	Enable this component's loop.

void	enable_loop_soon_any_context ()
	Thread and ISR-safe version of enable_loop() that can be called from any context.

bool	is_failed () const

bool	is_ready () const

virtual bool	can_proceed ()

bool	status_has_warning () const

bool	status_has_error () const

void	status_set_warning (const char *message=nullptr)

void	status_set_warning (const LogString *message)

void	status_set_error ()

	ESPDEPRECATED ("Use status_set_error(LOG_STR(\"static string literal\")) instead. Do NOT use .c_str() from temporary " "strings. Will stop working in 2026.6.0", "2025.12.0") void status_set_error(const char *message)

void	status_set_error (const LogString *message)

void	status_clear_warning ()

void	status_clear_error ()

void	status_momentary_warning (const char *name, uint32_t length=5000)
	Set warning status flag and automatically clear it after a timeout.

void	status_momentary_error (const char *name, uint32_t length=5000)
	Set error status flag and automatically clear it after a timeout.

bool	has_overridden_loop () const

void	set_component_source (const LogString *source)
	Set where this component was loaded from for some debug messages.

const LogString *	get_component_log_str () const
	Get the integration where this component was declared as a LogString for logging.

bool	should_warn_of_blocking (uint32_t blocking_time)

Protected Member Functions
void	handle_handshake_ ()

void	handle_data_ ()

bool	handle_auth_send_ ()

bool	handle_auth_read_ ()

bool	select_auth_type_ ()

void	cleanup_auth_ ()

void	log_auth_warning_ (const LogString *msg)

bool	readall_ (uint8_t *buf, size_t len)

bool	writeall_ (const uint8_t *buf, size_t len)

bool	write_byte_ (uint8_t byte)

bool	try_read_ (size_t to_read, const LogString *desc)

bool	try_write_ (size_t to_write, const LogString *desc)

bool	would_block_ (int error_code) const

bool	handle_read_error_ (ssize_t read, const LogString *desc)

bool	handle_write_error_ (ssize_t written, const LogString *desc)

void	transition_ota_state_ (OTAState next_state)

void	server_failed_ (const LogString *msg)

void	log_socket_error_ (const LogString *msg)

void	log_read_error_ (const LogString *what)

void	log_start_ (const LogString *phase)

void	log_remote_closed_ (const LogString *during)

void	cleanup_connection_ ()

void	send_error_and_cleanup_ (ota::OTAResponseTypes error)

void	yield_and_feed_watchdog_ ()

Protected Member Functions inherited from esphome::ota::OTAComponent
void	notify_state_ (OTAState state, float progress, uint8_t error)

void	notify_state_deferred_ (OTAState state, float progress, uint8_t error)
	Notify state with deferral to main loop (for thread safety).

Protected Member Functions inherited from esphome::Component
void	call_loop_ ()

virtual void	call_setup ()

void	call_dump_config_ ()

void	set_component_state_ (uint8_t state)
	Helper to set component state (clears state bits and sets new state)

bool	set_status_flag_ (uint8_t flag)
	Helper to set a status LED flag on both this component and the app.

void	set_interval (uint32_t id, uint32_t interval, std::function< void()> &&f)
	Set an interval function with a numeric ID (zero heap allocation).

void	set_interval (InternalSchedulerID id, uint32_t interval, std::function< void()> &&f)

void	set_interval (uint32_t interval, std::function< void()> &&f)

bool	cancel_interval (uint32_t id)

bool	cancel_interval (InternalSchedulerID id)

ESPDEPRECATED("set_retry is deprecated and will be removed in 2026.8.0. Use set_timeout or set_interval instead.", "2026.2.0") void set_retry(const std	ESPDEPRECATED ("set_retry is deprecated and will be removed in 2026.8.0. Use set_timeout or set_interval instead.", "2026.2.0") void set_retry(const char *name

	ESPDEPRECATED ("set_retry is deprecated and will be removed in 2026.8.0. Use set_timeout or set_interval instead.", "2026.2.0") void set_retry(uint32_t id

	ESPDEPRECATED ("set_retry is deprecated and will be removed in 2026.8.0. Use set_timeout or set_interval instead.", "2026.2.0") void set_retry(uint32_t initial_wait_time

ESPDEPRECATED("cancel_retry is deprecated and will be removed in 2026.8.0.", "2026.2.0") bool cancel_retry(const std	ESPDEPRECATED ("cancel_retry is deprecated and will be removed in 2026.8.0.", "2026.2.0") bool cancel_retry(const char *name)

	ESPDEPRECATED ("cancel_retry is deprecated and will be removed in 2026.8.0.", "2026.2.0") bool cancel_retry(uint32_t id)

void	set_timeout (uint32_t id, uint32_t timeout, std::function< void()> &&f)
	Set a timeout function with a numeric ID (zero heap allocation).

void	set_timeout (InternalSchedulerID id, uint32_t timeout, std::function< void()> &&f)

void	set_timeout (uint32_t timeout, std::function< void()> &&f)

bool	cancel_timeout (uint32_t id)

bool	cancel_timeout (InternalSchedulerID id)

void	defer (std::function< void()> &&f)
	Defer a callback to the next loop() call.

void	defer (uint32_t id, std::function< void()> &&f)
	Defer a callback with a numeric ID (zero heap allocation)

bool	cancel_defer (uint32_t id)

Protected Attributes
std::string	password_

std::unique_ptr< uint8_t[]>	auth_buf_

socket::ListenSocket *	server_ {nullptr}

std::unique_ptr< socket::Socket >	client_

std::unique_ptr< ota::OTABackend >	backend_

uint32_t	client_connect_time_ {0}

uint16_t	port_

uint8_t	handshake_buf_ [5]

OTAState	ota_state_ {OTAState::IDLE}

uint8_t	handshake_buf_pos_ {0}

uint8_t	ota_features_ {0}

uint8_t	auth_buf_pos_ {0}

uint8_t	auth_type_ {0}

Protected Attributes inherited from esphome::ota::OTAComponent
std::vector< OTAStateListener * >	state_listeners_

Protected Attributes inherited from esphome::Component
ESPDEPRECATED("Use const char* or uint32_t overload instead. Removed in 2026.7.0", "2026.1.0") void set_interval(const std voi	set_interval )(const char *name, uint32_t interval, std::function< void()> &&f)
	Set an interval function with a unique name.

ESPDEPRECATED("Use const char* or uint32_t overload instead. Removed in 2026.7.0", "2026.1.0") bool cancel_interval(const std boo	cancel_interval )(const char *name)
	Cancel an interval function.

ESPDEPRECATED("set_retry is deprecated and will be removed in 2026.8.0. Use set_timeout or set_interval instead.", "2026.2.0") void set_retry(const std uint32_t	initial_wait_time

ESPDEPRECATED("set_retry is deprecated and will be removed in 2026.8.0. Use set_timeout or set_interval instead.", "2026.2.0") void set_retry(const std uint32_t uint8_t	max_attempts

ESPDEPRECATED("set_retry is deprecated and will be removed in 2026.8.0. Use set_timeout or set_interval instead.", "2026.2.0") void set_retry(const std uint32_t uint8_t std::function< RetryResult(uint8_t)> &&	f

ESPDEPRECATED("set_retry is deprecated and will be removed in 2026.8.0. Use set_timeout or set_interval instead.", "2026.2.0") void set_retry(const std uint32_t uint8_t std::function< RetryResult(uint8_t)> float	backoff_increase_factor = 1.0f)

uint32_t	initial_wait_time

uint32_t uint8_t	max_attempts

uint32_t uint8_t std::function< RetryResult(uint8_t)> &&	f

uint32_t uint8_t std::function< RetryResult(uint8_t)> float	backoff_increase_factor = 1.0f)

uint8_t	max_attempts

uint8_t std::function< RetryResult(uint8_t)> &&	f

uint8_t std::function< RetryResult(uint8_t)> float	backoff_increase_factor = 1.0f)

ESPDEPRECATED("Use const char* or uint32_t overload instead. Removed in 2026.7.0", "2026.1.0") void set_timeout(const std voi	set_timeout )(const char *name, uint32_t timeout, std::function< void()> &&f)
	Set a timeout function with a unique name.

ESPDEPRECATED("Use const char* or uint32_t overload instead. Removed in 2026.7.0", "2026.1.0") bool cancel_timeout(const std boo	cancel_timeout )(const char *name)
	Cancel a timeout function.

ESPDEPRECATED("Use const char* overload instead. Removed in 2026.7.0", "2026.1.0") void defer(const std voi	defer )(const char *name, std::function< void()> &&f)
	Defer a callback to the next loop() call.

ESPDEPRECATED("Use const char* overload instead. Removed in 2026.7.0", "2026.1.0") bool cancel_defer(const std boo	cancel_defer )(const char *name)
	Cancel a defer callback using the specified name, name must not be empty.

const LogString *	component_source_ {nullptr}

uint16_t	warn_if_blocking_over_ {WARN_IF_BLOCKING_OVER_MS}
	Warn if blocked for this many ms (max 65.5s)

uint8_t	component_state_ {0x00}
	State of this component - each bit has a purpose: Bits 0-2: Component state (0x00=CONSTRUCTION, 0x01=SETUP, 0x02=LOOP, 0x03=FAILED, 0x04=LOOP_DONE) Bit 3: STATUS_LED_WARNING Bit 4: STATUS_LED_ERROR Bit 5: Has overridden loop() (set at registration time) Bits 6-7: Unused - reserved for future expansion.

volatile bool	pending_enable_loop_ {false}
	ISR-safe flag for enable_loop_soon_any_context.

Static Protected Attributes
static constexpr size_t	SHA256_HEX_SIZE = 64

Detailed Description

ESPHomeOTAComponent provides a simple way to integrate Over-the-Air updates into your app using ArduinoOTA.

Definition at line 15 of file ota_esphome.h.

Member Enumeration Documentation

◆ OTAState

enum class esphome::ESPHomeOTAComponent::OTAState : uint8_t

strong

Enumerator
IDLE
MAGIC_READ
MAGIC_ACK
FEATURE_READ
FEATURE_ACK
AUTH_SEND
AUTH_READ
DATA

Definition at line 17 of file ota_esphome.h.

Member Function Documentation

◆ cleanup_auth_()

void esphome::ESPHomeOTAComponent::cleanup_auth_ ( )

protected

Definition at line 676 of file ota_esphome.cpp.

◆ cleanup_connection_()

void esphome::ESPHomeOTAComponent::cleanup_connection_ ( )

protected

Definition at line 515 of file ota_esphome.cpp.

◆ dump_config()

void esphome::ESPHomeOTAComponent::dump_config ( )

overridevirtual

Reimplemented from esphome::Component.

Definition at line 69 of file ota_esphome.cpp.

◆ get_port()

uint16_t esphome::ESPHomeOTAComponent::get_port ( ) const

Definition at line 434 of file ota_esphome.cpp.

◆ get_setup_priority()

float esphome::ESPHomeOTAComponent::get_setup_priority ( ) const

overridevirtual

Reimplemented from esphome::Component.

Definition at line 433 of file ota_esphome.cpp.

◆ handle_auth_read_()

bool esphome::ESPHomeOTAComponent::handle_auth_read_ ( )

protected

Definition at line 618 of file ota_esphome.cpp.

◆ handle_auth_send_()

bool esphome::ESPHomeOTAComponent::handle_auth_send_ ( )

protected

Definition at line 549 of file ota_esphome.cpp.

◆ handle_data_()

void esphome::ESPHomeOTAComponent::handle_data_ ( )

protected

Handle the OTA data transfer and update process.

This method is blocking and will not return until the OTA update completes, fails, or times out. It receives the firmware data, writes it to flash, and reboots on success.

Authentication has already been handled in the non-blocking states AUTH_SEND/AUTH_READ.

Definition at line 233 of file ota_esphome.cpp.

◆ handle_handshake_()

void esphome::ESPHomeOTAComponent::handle_handshake_ ( )

protected

Handle the OTA handshake and authentication.

This method is non-blocking and will return immediately if no data is available. It manages the state machine through connection, magic bytes validation, feature negotiation, and authentication before entering the blocking data transfer phase.

Definition at line 95 of file ota_esphome.cpp.

◆ handle_read_error_()

bool esphome::ESPHomeOTAComponent::handle_read_error_	(	ssize_t	read,
		const LogString *	desc )

protected

Definition at line 462 of file ota_esphome.cpp.

◆ handle_write_error_()

bool esphome::ESPHomeOTAComponent::handle_write_error_	(	ssize_t	written,
		const LogString *	desc )

protected

Definition at line 475 of file ota_esphome.cpp.

◆ log_auth_warning_()

void esphome::ESPHomeOTAComponent::log_auth_warning_ ( const LogString * msg )

protected

Definition at line 534 of file ota_esphome.cpp.

◆ log_read_error_()

void esphome::ESPHomeOTAComponent::log_read_error_ ( const LogString * what )

protected

Definition at line 441 of file ota_esphome.cpp.

◆ log_remote_closed_()

void esphome::ESPHomeOTAComponent::log_remote_closed_ ( const LogString * during )

protected

Definition at line 449 of file ota_esphome.cpp.

◆ log_socket_error_()

void esphome::ESPHomeOTAComponent::log_socket_error_ ( const LogString * msg )

protected

Definition at line 437 of file ota_esphome.cpp.

◆ log_start_()

void esphome::ESPHomeOTAComponent::log_start_ ( const LogString * phase )

protected

Definition at line 443 of file ota_esphome.cpp.

◆ loop()

void esphome::ESPHomeOTAComponent::loop ( )

overridevirtual

Reimplemented from esphome::Component.

Definition at line 82 of file ota_esphome.cpp.

◆ readall_()

bool esphome::ESPHomeOTAComponent::readall_	(	uint8_t *	buf,
		size_t	len )

protected

Definition at line 382 of file ota_esphome.cpp.

◆ select_auth_type_()

bool esphome::ESPHomeOTAComponent::select_auth_type_ ( )

protected

Definition at line 536 of file ota_esphome.cpp.

◆ send_error_and_cleanup_()

void esphome::ESPHomeOTAComponent::send_error_and_cleanup_ ( ota::OTAResponseTypes error )

inlineprotected

Definition at line 75 of file ota_esphome.h.

◆ server_failed_()

void esphome::ESPHomeOTAComponent::server_failed_ ( const LogString * msg )

protected

Definition at line 453 of file ota_esphome.cpp.

◆ set_auth_password()

void esphome::ESPHomeOTAComponent::set_auth_password ( const std::string & password )

inline

Definition at line 30 of file ota_esphome.h.

◆ set_port()

void esphome::ESPHomeOTAComponent::set_port ( uint16_t port )

Manually set the port OTA should listen on.

Definition at line 435 of file ota_esphome.cpp.

◆ setup()

void esphome::ESPHomeOTAComponent::setup ( )

overridevirtual

Reimplemented from esphome::Component.

Definition at line 30 of file ota_esphome.cpp.

◆ transition_ota_state_()

void esphome::ESPHomeOTAComponent::transition_ota_state_ ( OTAState next_state )

inlineprotected

Definition at line 64 of file ota_esphome.h.

◆ try_read_()

bool esphome::ESPHomeOTAComponent::try_read_	(	size_t	to_read,
		const LogString *	desc )

protected

Definition at line 487 of file ota_esphome.cpp.

◆ try_write_()

bool esphome::ESPHomeOTAComponent::try_write_	(	size_t	to_write,
		const LogString *	desc )

protected

Definition at line 501 of file ota_esphome.cpp.

◆ would_block_()

bool esphome::ESPHomeOTAComponent::would_block_ ( int error_code ) const

inlineprotected

Definition at line 61 of file ota_esphome.h.

◆ write_byte_()

bool esphome::ESPHomeOTAComponent::write_byte_ ( uint8_t byte )

inlineprotected

Definition at line 56 of file ota_esphome.h.

◆ writeall_()

bool esphome::ESPHomeOTAComponent::writeall_	(	const uint8_t *	buf,
		size_t	len )

protected

Definition at line 409 of file ota_esphome.cpp.

◆ yield_and_feed_watchdog_()

void esphome::ESPHomeOTAComponent::yield_and_feed_watchdog_ ( )

protected

Definition at line 528 of file ota_esphome.cpp.

Field Documentation

◆ auth_buf_

std::unique_ptr<uint8_t[]> esphome::ESPHomeOTAComponent::auth_buf_

protected

Definition at line 84 of file ota_esphome.h.

◆ auth_buf_pos_

uint8_t esphome::ESPHomeOTAComponent::auth_buf_pos_ {0}

protected

Definition at line 98 of file ota_esphome.h.

◆ auth_type_

uint8_t esphome::ESPHomeOTAComponent::auth_type_ {0}

protected

Definition at line 99 of file ota_esphome.h.

◆ backend_

std::unique_ptr<ota::OTABackend> esphome::ESPHomeOTAComponent::backend_

protected

Definition at line 89 of file ota_esphome.h.

◆ client_

std::unique_ptr<socket::Socket> esphome::ESPHomeOTAComponent::client_

protected

Definition at line 88 of file ota_esphome.h.

◆ client_connect_time_

uint32_t esphome::ESPHomeOTAComponent::client_connect_time_ {0}

protected

Definition at line 91 of file ota_esphome.h.

◆ handshake_buf_

uint8_t esphome::ESPHomeOTAComponent::handshake_buf_[5]

protected

Definition at line 93 of file ota_esphome.h.

◆ handshake_buf_pos_

uint8_t esphome::ESPHomeOTAComponent::handshake_buf_pos_ {0}

protected

Definition at line 95 of file ota_esphome.h.

◆ ota_features_

uint8_t esphome::ESPHomeOTAComponent::ota_features_ {0}

protected

Definition at line 96 of file ota_esphome.h.

◆ ota_state_

OTAState esphome::ESPHomeOTAComponent::ota_state_ {OTAState::IDLE}

protected

Definition at line 94 of file ota_esphome.h.

◆ password_

std::string esphome::ESPHomeOTAComponent::password_

protected

Definition at line 83 of file ota_esphome.h.

◆ port_

uint16_t esphome::ESPHomeOTAComponent::port_

protected

Definition at line 92 of file ota_esphome.h.

◆ server_

socket::ListenSocket* esphome::ESPHomeOTAComponent::server_ {nullptr}

protected

Definition at line 87 of file ota_esphome.h.

◆ SHA256_HEX_SIZE

size_t esphome::ESPHomeOTAComponent::SHA256_HEX_SIZE = 64

staticconstexprprotected

Definition at line 47 of file ota_esphome.h.

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

esphome/components/esphome/ota/ota_esphome.h
esphome/components/esphome/ota/ota_esphome.cpp

Public Types

Public Member Functions

Protected Member Functions

Protected Attributes

Static Protected Attributes

Detailed Description

Member Enumeration Documentation

◆ OTAState

Member Function Documentation

◆ cleanup_auth_()

◆ cleanup_connection_()

◆ dump_config()

◆ get_port()

◆ get_setup_priority()

◆ handle_auth_read_()

◆ handle_auth_send_()

◆ handle_data_()

◆ handle_handshake_()

◆ handle_read_error_()

◆ handle_write_error_()

◆ log_auth_warning_()

◆ log_read_error_()

◆ log_remote_closed_()

◆ log_socket_error_()

◆ log_start_()

◆ loop()

◆ readall_()

◆ select_auth_type_()

◆ send_error_and_cleanup_()

◆ server_failed_()

◆ set_auth_password()

◆ set_port()

◆ setup()

◆ transition_ota_state_()

◆ try_read_()

◆ try_write_()

◆ would_block_()

◆ write_byte_()

◆ writeall_()

◆ yield_and_feed_watchdog_()

Field Documentation

◆ auth_buf_

◆ auth_buf_pos_

◆ auth_type_

◆ backend_

◆ client_

◆ client_connect_time_

◆ handshake_buf_

◆ handshake_buf_pos_

◆ ota_features_

◆ ota_state_

◆ password_

◆ port_

◆ server_

◆ SHA256_HEX_SIZE