ESPHome  2022.1.2
Public Member Functions | Protected Types | Protected Member Functions | Protected Attributes
esphome::sgp40::SGP40Component Class Reference

This class implements support for the Sensirion sgp40 i2c GAS (VOC) sensors. More...

#include <sgp40.h>

Inheritance diagram for esphome::sgp40::SGP40Component:
esphome::PollingComponent esphome::sensor::Sensor esphome::i2c::I2CDevice esphome::Component esphome::EntityBase

Public Member Functions

void set_humidity_sensor (sensor::Sensor *humidity)
 
void set_temperature_sensor (sensor::Sensor *temperature)
 
void setup () override
 
void update () override
 
void update_voc_index ()
 
void dump_config () override
 
float get_setup_priority () const override
 
void set_store_baseline (bool store_baseline)
 
- Public Member Functions inherited from esphome::PollingComponent
 PollingComponent ()
 
 PollingComponent (uint32_t update_interval)
 Initialize this polling component with the given update interval in ms. More...
 
virtual void set_update_interval (uint32_t update_interval)
 Manually set the update interval in ms for this polling object. More...
 
void call_setup () override
 
virtual uint32_t get_update_interval () const
 Get the update interval in ms of this sensor. More...
 
- Public Member Functions inherited from esphome::Component
virtual void loop ()
 This method will be called repeatedly. More...
 
float get_actual_setup_priority () const
 
void set_setup_priority (float priority)
 
virtual float get_loop_priority () const
 priority of loop(). More...
 
void call ()
 
virtual void on_shutdown ()
 
virtual void on_safe_shutdown ()
 
uint32_t get_component_state () const
 
virtual void mark_failed ()
 Mark this component as failed. More...
 
bool is_failed ()
 
virtual bool can_proceed ()
 
bool status_has_warning ()
 
bool status_has_error ()
 
void status_set_warning ()
 
void status_set_error ()
 
void status_clear_warning ()
 
void status_clear_error ()
 
void status_momentary_warning (const std::string &name, uint32_t length=5000)
 
void status_momentary_error (const std::string &name, uint32_t length=5000)
 
bool has_overridden_loop () const
 
void set_component_source (const char *source)
 Set where this component was loaded from for some debug messages. More...
 
const char * get_component_source () const
 Get the integration where this component was declared as a string. More...
 
- Public Member Functions inherited from esphome::sensor::Sensor
 Sensor ()
 
 Sensor (const std::string &name)
 
std::string get_unit_of_measurement ()
 Get the unit of measurement, using the manual override if set. More...
 
void set_unit_of_measurement (const std::string &unit_of_measurement)
 Manually set the unit of measurement. More...
 
int8_t get_accuracy_decimals ()
 Get the accuracy in decimals, using the manual override if set. More...
 
void set_accuracy_decimals (int8_t accuracy_decimals)
 Manually set the accuracy in decimals. More...
 
std::string get_device_class ()
 Get the device class, using the manual override if set. More...
 
void set_device_class (const std::string &device_class)
 Manually set the device class. More...
 
StateClass get_state_class ()
 Get the state class, using the manual override if set. More...
 
void set_state_class (StateClass state_class)
 Manually set the state class. More...
 
bool get_force_update () const
 Get whether force update mode is enabled. More...
 
void set_force_update (bool force_update)
 Set force update mode. More...
 
void add_filter (Filter *filter)
 Add a filter to the filter chain. Will be appended to the back. More...
 
void add_filters (const std::vector< Filter *> &filters)
 Add a list of vectors to the back of the filter chain. More...
 
void set_filters (const std::vector< Filter *> &filters)
 Clear the filters and replace them by filters. More...
 
void clear_filters ()
 Clear the entire filter chain. More...
 
float get_state () const
 Getter-syntax for .state. More...
 
float get_raw_state () const
 Getter-syntax for .raw_state. More...
 
void publish_state (float state)
 Publish a new state to the front-end. More...
 
void add_on_state_callback (std::function< void(float)> &&callback)
 Add a callback that will be called every time a filtered value arrives. More...
 
void add_on_raw_state_callback (std::function< void(float)> &&callback)
 Add a callback that will be called every time the sensor sends a raw value. More...
 
bool has_state () const
 Return whether this sensor has gotten a full state (that passed through all filters) yet. More...
 
virtual std::string unique_id ()
 A unique ID for this sensor, empty for no unique id. More...
 
void internal_send_state_to_frontend (float state)
 
- Public Member Functions inherited from esphome::EntityBase
 EntityBase ()
 
 EntityBase (std::string name)
 
const std::string & get_name () const
 
void set_name (const std::string &name)
 
const std::string & get_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)
 
const std::string & get_icon () const
 
void set_icon (const std::string &name)
 
- Public Member Functions inherited from esphome::i2c::I2CDevice
 I2CDevice ()=default
 
void set_i2c_address (uint8_t address)
 
void set_i2c_bus (I2CBus *bus)
 
I2CRegister reg (uint8_t a_register)
 
ErrorCode read (uint8_t *data, size_t len)
 
ErrorCode read_register (uint8_t a_register, uint8_t *data, size_t len)
 
ErrorCode write (const uint8_t *data, uint8_t len)
 
ErrorCode write_register (uint8_t a_register, const uint8_t *data, size_t len)
 
bool read_bytes (uint8_t a_register, uint8_t *data, uint8_t len)
 
bool read_bytes_raw (uint8_t *data, uint8_t len)
 
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)
 
bool write_bytes (uint8_t a_register, const std::vector< uint8_t > &data)
 
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)
 
bool write_byte (uint8_t a_register, uint8_t data)
 
bool write_byte_16 (uint8_t a_register, uint16_t data)
 

Protected Types

enum  ErrorCode {
  COMMUNICATION_FAILED, MEASUREMENT_INIT_FAILED, INVALID_ID, UNSUPPORTED_ID,
  UNKNOWN
}
 

Protected Member Functions

bool write_command_ (uint16_t command)
 
bool read_data_ (uint16_t *data, uint8_t len)
 
int16_t sensirion_init_sensors_ ()
 
int16_t sgp40_probe_ ()
 
uint8_t sht_crc_ (uint8_t data1, uint8_t data2)
 
int32_t measure_voc_index_ ()
 Combined the measured gasses, temperature, and humidity to calculate the VOC Index. More...
 
uint8_t generate_crc_ (const uint8_t *data, uint8_t datalen)
 
uint16_t measure_raw_ ()
 Return the raw gas measurement. More...
 
void self_test_ ()
 Request the sensor to perform a self-test, returning the result. More...
 
- Protected Member Functions inherited from esphome::Component
virtual void call_loop ()
 
virtual void call_dump_config ()
 
void set_interval (const std::string &name, uint32_t interval, std::function< void()> &&f)
 Set an interval function with a unique name. More...
 
void set_interval (uint32_t interval, std::function< void()> &&f)
 
bool cancel_interval (const std::string &name)
 Cancel an interval function. More...
 
void set_retry (const std::string &name, uint32_t initial_wait_time, uint8_t max_attempts, std::function< RetryResult()> &&f, float backoff_increase_factor=1.0f)
 Set an retry function with a unique name. More...
 
void set_retry (uint32_t initial_wait_time, uint8_t max_attempts, std::function< RetryResult()> &&f, float backoff_increase_factor=1.0f)
 
bool cancel_retry (const std::string &name)
 Cancel a retry function. More...
 
void set_timeout (const std::string &name, uint32_t timeout, std::function< void()> &&f)
 Set a timeout function with a unique name. More...
 
void set_timeout (uint32_t timeout, std::function< void()> &&f)
 
bool cancel_timeout (const std::string &name)
 Cancel a timeout function. More...
 
void defer (const std::string &name, std::function< void()> &&f)
 Defer a callback to the next loop() call. More...
 
void defer (std::function< void()> &&f)
 Defer a callback to the next loop() call. More...
 
bool cancel_defer (const std::string &name)
 Cancel a defer callback using the specified name, name must not be empty. More...
 
- Protected Member Functions inherited from esphome::sensor::Sensor
virtual std::string unit_of_measurement ()
 Override this to set the default unit of measurement. More...
 
virtual int8_t accuracy_decimals ()
 Override this to set the default accuracy in decimals. More...
 
virtual std::string device_class ()
 Override this to set the default device class. More...
 
virtual StateClass state_class ()
 Override this to set the default state class. More...
 
uint32_t hash_base () override
 
- Protected Member Functions inherited from esphome::EntityBase
void calc_object_id_ ()
 

Protected Attributes

sensor::Sensorhumidity_sensor_ {nullptr}
 Input sensor for humidity and temperature compensation. More...
 
sensor::Sensortemperature_sensor_ {nullptr}
 
uint64_t serial_number_
 
uint16_t featureset_
 
ESPPreferenceObject pref_
 
uint32_t seconds_since_last_store_
 
SGP40Baselines baselines_storage_
 
VocAlgorithmParams voc_algorithm_params_
 
bool self_test_complete_
 
bool store_baseline_
 
int32_t state0_
 
int32_t state1_
 
int32_t voc_index_ = 0
 
uint8_t samples_read_ = 0
 
uint8_t samples_to_stabalize_ = static_cast<int8_t>(VOC_ALGORITHM_INITIAL_BLACKOUT) * 2
 
enum esphome::sgp40::SGP40Component::ErrorCode UNKNOWN
 
- Protected Attributes inherited from esphome::PollingComponent
uint32_t update_interval_
 
- Protected Attributes inherited from esphome::Component
uint32_t component_state_ {0x0000}
 State of this component. More...
 
float setup_priority_override_ {NAN}
 
const char * component_source_ = nullptr
 
- Protected Attributes inherited from esphome::sensor::Sensor
CallbackManager< void(float)> raw_callback_
 Storage for raw state callbacks. More...
 
CallbackManager< void(float)> callback_
 Storage for filtered state callbacks. More...
 
bool has_state_ {false}
 
Filterfilter_list_ {nullptr}
 Store all active filters. More...
 
optional< std::string > unit_of_measurement_
 Unit of measurement override. More...
 
optional< int8_t > accuracy_decimals_
 Accuracy in decimals override. More...
 
optional< std::string > device_class_
 Device class override. More...
 
optional< StateClassstate_class_ {STATE_CLASS_NONE}
 State class override. More...
 
bool force_update_ {false}
 Force update mode. More...
 
- Protected Attributes inherited from esphome::EntityBase
std::string name_
 
std::string object_id_
 
std::string icon_
 
uint32_t object_id_hash_
 
bool internal_ {false}
 
bool disabled_by_default_ {false}
 
EntityCategory entity_category_ {ENTITY_CATEGORY_NONE}
 
- Protected Attributes inherited from esphome::i2c::I2CDevice
uint8_t address_ {0x00}
 
I2CBusbus_ {nullptr}
 

Additional Inherited Members

- Data Fields inherited from esphome::sensor::Sensor
float state
 This member variable stores the last state that has passed through all filters. More...
 
float raw_state
 This member variable stores the current raw state of the sensor, without any filters applied. More...
 

Detailed Description

This class implements support for the Sensirion sgp40 i2c GAS (VOC) sensors.

Definition at line 42 of file sgp40.h.

Member Enumeration Documentation

◆ ErrorCode

Enumerator
COMMUNICATION_FAILED 
MEASUREMENT_INIT_FAILED 
INVALID_ID 
UNSUPPORTED_ID 
UNKNOWN 

Definition at line 86 of file sgp40.h.

Member Function Documentation

◆ dump_config()

void esphome::sgp40::SGP40Component::dump_config ( )
overridevirtual

Reimplemented from esphome::Component.

Definition at line 266 of file sgp40.cpp.

◆ generate_crc_()

uint8_t esphome::sgp40::SGP40Component::generate_crc_ ( const uint8_t *  data,
uint8_t  datalen 
)
protected

Definition at line 225 of file sgp40.cpp.

◆ get_setup_priority()

float esphome::sgp40::SGP40Component::get_setup_priority ( ) const
inlineoverridevirtual

Reimplemented from esphome::Component.

Definition at line 51 of file sgp40.h.

◆ measure_raw_()

uint16_t esphome::sgp40::SGP40Component::measure_raw_ ( )
protected

Return the raw gas measurement.

Parameters
temperatureThe measured temperature in degrees C
humidityThe measured relative humidity in % rH
Returns
uint16_t The current raw gas measurement

Definition at line 172 of file sgp40.cpp.

◆ measure_voc_index_()

int32_t esphome::sgp40::SGP40Component::measure_voc_index_ ( )
protected

Combined the measured gasses, temperature, and humidity to calculate the VOC Index.

Parameters
temperatureThe measured temperature in degrees C
humidityThe measured relative humidity in % rH
Returns
int32_t The VOC Index

Definition at line 131 of file sgp40.cpp.

◆ read_data_()

bool esphome::sgp40::SGP40Component::read_data_ ( uint16_t *  data,
uint8_t  len 
)
protected

Definition at line 323 of file sgp40.cpp.

◆ self_test_()

void esphome::sgp40::SGP40Component::self_test_ ( )
protected

Request the sensor to perform a self-test, returning the result.

Returns
true: success false:failure

Definition at line 96 of file sgp40.cpp.

◆ sensirion_init_sensors_()

int16_t esphome::sgp40::SGP40Component::sensirion_init_sensors_ ( )
protected

◆ set_humidity_sensor()

void esphome::sgp40::SGP40Component::set_humidity_sensor ( sensor::Sensor humidity)
inline

Definition at line 44 of file sgp40.h.

◆ set_store_baseline()

void esphome::sgp40::SGP40Component::set_store_baseline ( bool  store_baseline)
inline

Definition at line 52 of file sgp40.h.

◆ set_temperature_sensor()

void esphome::sgp40::SGP40Component::set_temperature_sensor ( sensor::Sensor temperature)
inline

Definition at line 45 of file sgp40.h.

◆ setup()

void esphome::sgp40::SGP40Component::setup ( )
overridevirtual

Reimplemented from esphome::Component.

Definition at line 11 of file sgp40.cpp.

◆ sgp40_probe_()

int16_t esphome::sgp40::SGP40Component::sgp40_probe_ ( )
protected

◆ sht_crc_()

uint8_t esphome::sgp40::SGP40Component::sht_crc_ ( uint8_t  data1,
uint8_t  data2 
)
protected

Definition at line 300 of file sgp40.cpp.

◆ update()

void esphome::sgp40::SGP40Component::update ( )
overridevirtual

Implements esphome::PollingComponent.

Definition at line 253 of file sgp40.cpp.

◆ update_voc_index()

void esphome::sgp40::SGP40Component::update_voc_index ( )

Definition at line 241 of file sgp40.cpp.

◆ write_command_()

bool esphome::sgp40::SGP40Component::write_command_ ( uint16_t  command)
protected

Definition at line 295 of file sgp40.cpp.

Field Documentation

◆ baselines_storage_

SGP40Baselines esphome::sgp40::SGP40Component::baselines_storage_
protected

Definition at line 70 of file sgp40.h.

◆ featureset_

uint16_t esphome::sgp40::SGP40Component::featureset_
protected

Definition at line 64 of file sgp40.h.

◆ humidity_sensor_

sensor::Sensor* esphome::sgp40::SGP40Component::humidity_sensor_ {nullptr}
protected

Input sensor for humidity and temperature compensation.

Definition at line 56 of file sgp40.h.

◆ pref_

ESPPreferenceObject esphome::sgp40::SGP40Component::pref_
protected

Definition at line 68 of file sgp40.h.

◆ samples_read_

uint8_t esphome::sgp40::SGP40Component::samples_read_ = 0
protected

Definition at line 77 of file sgp40.h.

◆ samples_to_stabalize_

uint8_t esphome::sgp40::SGP40Component::samples_to_stabalize_ = static_cast<int8_t>(VOC_ALGORITHM_INITIAL_BLACKOUT) * 2
protected

Definition at line 78 of file sgp40.h.

◆ seconds_since_last_store_

uint32_t esphome::sgp40::SGP40Component::seconds_since_last_store_
protected

Definition at line 69 of file sgp40.h.

◆ self_test_complete_

bool esphome::sgp40::SGP40Component::self_test_complete_
protected

Definition at line 72 of file sgp40.h.

◆ serial_number_

uint64_t esphome::sgp40::SGP40Component::serial_number_
protected

Definition at line 63 of file sgp40.h.

◆ state0_

int32_t esphome::sgp40::SGP40Component::state0_
protected

Definition at line 74 of file sgp40.h.

◆ state1_

int32_t esphome::sgp40::SGP40Component::state1_
protected

Definition at line 75 of file sgp40.h.

◆ store_baseline_

bool esphome::sgp40::SGP40Component::store_baseline_
protected

Definition at line 73 of file sgp40.h.

◆ temperature_sensor_

sensor::Sensor* esphome::sgp40::SGP40Component::temperature_sensor_ {nullptr}
protected

Definition at line 57 of file sgp40.h.

◆ UNKNOWN

enum esphome::sgp40::SGP40Component::ErrorCode esphome::sgp40::SGP40Component::UNKNOWN
protected

◆ voc_algorithm_params_

VocAlgorithmParams esphome::sgp40::SGP40Component::voc_algorithm_params_
protected

Definition at line 71 of file sgp40.h.

◆ voc_index_

int32_t esphome::sgp40::SGP40Component::voc_index_ = 0
protected

Definition at line 76 of file sgp40.h.


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