#include <ch423.h>

Inheritance diagram for esphome::ch423::CH423Component:

Public Member Functions
	CH423Component ()=default

void	setup () override
	Check i2c availability and setup masks.

void	loop () override
	Poll for input changes periodically.

bool	digital_read (uint8_t pin)
	Helper function to read the value of a pin.

void	digital_write (uint8_t pin, bool value)
	Helper function to write the value of a pin.

void	pin_mode (uint8_t pin, gpio::Flags flags)
	Helper function to set the pin mode of a pin.

float	get_setup_priority () const override

float	get_loop_priority () const override

void	dump_config () override

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

void	set_setup_priority (float priority)

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.

virtual 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)

Public Member Functions inherited from esphome::i2c::I2CDevice
	I2CDevice ()=default
	we use the C++ default constructor

void	set_i2c_address (uint8_t address)
	We store the address of the device on the bus.

uint8_t	get_i2c_address () const
	Returns the I2C address of the object.

void	set_i2c_bus (I2CBus *bus)
	we store the pointer to the I2CBus to use

I2CRegister	reg (uint8_t a_register)
	calls the I2CRegister constructor

I2CRegister16	reg16 (uint16_t a_register)
	calls the I2CRegister16 constructor

ErrorCode	read (uint8_t *data, size_t len) const
	reads an array of bytes from the device using an I2CBus

ErrorCode	read_register (uint8_t a_register, uint8_t *data, size_t len)
	reads an array of bytes from a specific register in the I²C device

ErrorCode	read_register16 (uint16_t a_register, uint8_t *data, size_t len)
	reads an array of bytes from a specific register in the I²C device

ErrorCode	write (const uint8_t *data, size_t len) const
	writes an array of bytes to a device using an I2CBus

ErrorCode	write_read (const uint8_t write_data, size_t write_len, uint8_t read_data, size_t read_len) const
	writes an array of bytes to a device, then reads an array, as a single transaction

ErrorCode	write_register (uint8_t a_register, const uint8_t *data, size_t len) const
	writes an array of bytes to a specific register in the I²C device

ErrorCode	write_register16 (uint16_t a_register, const uint8_t *data, size_t len) const
	write an array of bytes to a specific register in the I²C device

bool	read_bytes (uint8_t a_register, uint8_t *data, uint8_t len)
	Compat APIs All methods below have been added for compatibility reasons.

bool	read_bytes_raw (uint8_t *data, uint8_t len) const

template<size_t N>
optional< std::array< uint8_t, N > >	read_bytes (uint8_t a_register)

template<size_t N>
optional< std::array< uint8_t, N > >	read_bytes_raw ()

bool	read_bytes_16 (uint8_t a_register, uint16_t *data, uint8_t len)

bool	read_byte (uint8_t a_register, uint8_t *data)

optional< uint8_t >	read_byte (uint8_t a_register)

bool	read_byte_16 (uint8_t a_register, uint16_t *data)

bool	write_bytes (uint8_t a_register, const uint8_t *data, uint8_t len) const

bool	write_bytes (uint8_t a_register, const std::vector< uint8_t > &data) const

template<size_t N>
bool	write_bytes (uint8_t a_register, const std::array< uint8_t, N > &data)

bool	write_bytes_16 (uint8_t a_register, const uint16_t *data, uint8_t len) const

bool	write_byte (uint8_t a_register, uint8_t data) const

bool	write_byte_16 (uint8_t a_register, uint16_t data) const

	ESPDEPRECATED ("The stop argument is no longer used. This will be removed from ESPHome 2026.3.0", "2025.9.0") ErrorCode read_register(uint8_t a_register

	ESPDEPRECATED ("The stop argument is no longer used. This will be removed from ESPHome 2026.3.0", "2025.9.0") ErrorCode read_register16(uint16_t a_register

	ESPDEPRECATED ("The stop argument is no longer used; use write_read() for consecutive write and read. This will be " "removed from ESPHome 2026.3.0", "2025.9.0") ErrorCode write(const uint8_t *data

	ESPDEPRECATED ("The stop argument is no longer used; use write_read() for consecutive write and read. This will be " "removed from ESPHome 2026.3.0", "2025.9.0") ErrorCode write_register(uint8_t a_register

	ESPDEPRECATED ("The stop argument is no longer used; use write_read() for consecutive write and read. This will be " "removed from ESPHome 2026.3.0", "2025.9.0") ErrorCode write_register16(uint16_t a_register

Protected Member Functions
bool	write_reg_ (uint8_t reg, uint8_t value)

uint8_t	read_reg_ (uint8_t reg)

bool	read_inputs_ ()

bool	write_outputs_ ()

Protected Member Functions inherited from esphome::Component
virtual void	call_loop ()

virtual void	call_setup ()

virtual void	call_dump_config ()

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

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
uint32_t	output_bits_ {0x00}
	The mask to write as output state - 1 means HIGH, 0 means LOW.

uint8_t	pin_read_flags_ {0x00}
	Flags to check if read previously during this loop.

uint8_t	input_bits_ {0x00}
	Copy of last read values.

uint8_t	sys_params_ {0x00}
	System parameters.

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 Bits 5-7: Unused - reserved for future expansion.

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

Protected Attributes inherited from esphome::i2c::I2CDevice
uint8_t	address_ {0x00}
	store the address of the device on the bus

I2CBus *	bus_ {nullptr}
	pointer to I2CBus instance

Additional Inherited Members
Data Fields inherited from esphome::i2c::I2CDevice
uint8_t *	data

uint8_t size_t	len

uint8_t size_t bool	stop

size_t	len

size_t bool stop	const { return this->write(data, len)

const uint8_t *	data

const uint8_t size_t	len

const uint8_t size_t bool stop	const

Detailed Description

Definition at line 9 of file ch423.h.

Constructor & Destructor Documentation

◆ CH423Component()

esphome::ch423::CH423Component::CH423Component ( )

default

Member Function Documentation

◆ digital_read()

bool esphome::ch423::CH423Component::digital_read ( uint8_t pin )

Helper function to read the value of a pin.

Definition at line 60 of file ch423.cpp.

◆ digital_write()

void esphome::ch423::CH423Component::digital_write	(	uint8_t	pin,
		bool	value )

Helper function to write the value of a pin.

Definition at line 70 of file ch423.cpp.

◆ dump_config()

void esphome::ch423::CH423Component::dump_config ( )

overridevirtual

Reimplemented from esphome::Component.

Definition at line 41 of file ch423.cpp.

◆ get_loop_priority()

float esphome::ch423::CH423Component::get_loop_priority ( ) const

overridevirtual

Reimplemented from esphome::Component.

Definition at line 134 of file ch423.cpp.

◆ get_setup_priority()

float esphome::ch423::CH423Component::get_setup_priority ( ) const

overridevirtual

Reimplemented from esphome::Component.

Definition at line 130 of file ch423.cpp.

◆ loop()

void esphome::ch423::CH423Component::loop ( )

overridevirtual

Poll for input changes periodically.

Reimplemented from esphome::Component.

Definition at line 36 of file ch423.cpp.

◆ pin_mode()

void esphome::ch423::CH423Component::pin_mode	(	uint8_t	pin,
		gpio::Flags	flags )

Helper function to set the pin mode of a pin.

Definition at line 48 of file ch423.cpp.

◆ read_inputs_()

bool esphome::ch423::CH423Component::read_inputs_ ( )

protected

Definition at line 79 of file ch423.cpp.

◆ read_reg_()

uint8_t esphome::ch423::CH423Component::read_reg_ ( uint8_t reg )

protected

Definition at line 106 of file ch423.cpp.

◆ setup()

void esphome::ch423::CH423Component::setup ( )

overridevirtual

Check i2c availability and setup masks.

Reimplemented from esphome::Component.

Definition at line 17 of file ch423.cpp.

◆ write_outputs_()

bool esphome::ch423::CH423Component::write_outputs_ ( )

protected

Definition at line 119 of file ch423.cpp.

◆ write_reg_()

bool esphome::ch423::CH423Component::write_reg_	(	uint8_t	reg,
		uint8_t	value )

protected

Definition at line 94 of file ch423.cpp.

Field Documentation

◆ input_bits_

uint8_t esphome::ch423::CH423Component::input_bits_ {0x00}

protected

Copy of last read values.

Definition at line 39 of file ch423.h.

◆ output_bits_

uint32_t esphome::ch423::CH423Component::output_bits_ {0x00}

protected

The mask to write as output state - 1 means HIGH, 0 means LOW.

Definition at line 35 of file ch423.h.

◆ pin_read_flags_

uint8_t esphome::ch423::CH423Component::pin_read_flags_ {0x00}

protected

Flags to check if read previously during this loop.

Definition at line 37 of file ch423.h.

◆ sys_params_

uint8_t esphome::ch423::CH423Component::sys_params_ {0x00}

protected

System parameters.

Definition at line 41 of file ch423.h.

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

esphome/components/ch423/ch423.h
esphome/components/ch423/ch423.cpp

Public Member Functions

Protected Member Functions

Protected Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ CH423Component()

Member Function Documentation

◆ digital_read()

◆ digital_write()

◆ dump_config()

◆ get_loop_priority()

◆ get_setup_priority()

◆ loop()

◆ pin_mode()

◆ read_inputs_()

◆ read_reg_()

◆ setup()

◆ write_outputs_()

◆ write_reg_()

Field Documentation

◆ input_bits_

◆ output_bits_

◆ pin_read_flags_

◆ sys_params_