SensESP 3.4.1-alpha
Universal Signal K sensor toolkit ESP32
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sensesp::Frequency Class Reference

Transforms its input into frequency (Hz: cycles per second) More...

#include <sensesp/transforms/frequency.h>

Inheritance diagram for sensesp::Frequency:
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Public Member Functions

 Frequency (float multiplier=1, const String &config_path="")
 
virtual void set (const int &input) override
 
virtual bool to_json (JsonObject &root) override
 
virtual bool from_json (const JsonObject &config) override
 
- Public Member Functions inherited from sensesp::Transform< int, float >
 Transform (String config_path="")
 
Transform< int, float > * connect_from (ValueProducer< float > *producer0, ValueProducer< float > *producer1=NULL, ValueProducer< float > *producer2=NULL, ValueProducer< float > *producer3=NULL, ValueProducer< float > *producer4=NULL)
 
- Public Member Functions inherited from sensesp::TransformBase
 TransformBase (const String &config_path)
 
virtual ~TransformBase ()
 
- Public Member Functions inherited from sensesp::FileSystemSaveable
 FileSystemSaveable (const String &config_path)
 
virtual bool load () override
 Load and populate the object from a persistent storage.
 
virtual bool save () override
 Save the object to a persistent storage.
 
virtual bool clear () override
 Delete the data from a persistent storage.
 
bool find_config_file (const String &config_path, String &filename)
 
- Public Member Functions inherited from sensesp::Saveable
 Saveable (const String &config_path)
 
virtual bool refresh ()
 Refresh the object. This may or may not access the persistent storage but is not expected to overwrite the object's state.
 
const String & get_config_path () const
 
- Public Member Functions inherited from sensesp::ValueConsumer< T >
virtual void set (const T &new_value)
 
virtual void set_input (const T &new_value)
 
void connect_from (ValueProducer< T > *producer)
 
- Public Member Functions inherited from sensesp::ValueProducer< T >
 ValueProducer ()
 
 ValueProducer (const T &initial_value)
 
virtual const T & get () const
 
template<typename VConsumer >
std::enable_if< std::is_base_of< ValueConsumer< typenameVConsumer::input_type >, VConsumer >::value &&std::is_convertible< T, typenameVConsumer::input_type >::value, std::shared_ptr< VConsumer > >::type connect_to (std::shared_ptr< VConsumer > consumer)
 Connect a producer to a transform with a different input type.
 
template<typename VConsumer >
std::enable_if< std::is_base_of< ValueConsumer< typenameVConsumer::input_type >, VConsumer >::value &&std::is_convertible< T, typenameVConsumer::input_type >::value, VConsumer * >::type connect_to (VConsumer *consumer)
 
template<typename VConsumer >
std::enable_if< std::is_base_of< ValueConsumer< typenameVConsumer::input_type >, VConsumer >::value &&std::is_convertible< T, typenameVConsumer::input_type >::value, VConsumer * >::type connect_to (VConsumer &consumer)
 
void emit (const T &new_value)
 
- Public Member Functions inherited from sensesp::Observable
 Observable ()
 
 Observable (Observable &&other)
 Move constructor.
 
void notify ()
 
int attach (std::function< void()> observer)
 Attach an observer callback.
 
void detach (int id)
 Remove a previously attached observer by its ID.
 

Additional Inherited Members

- Public Types inherited from sensesp::ValueConsumer< T >
using input_type = T
 
- Static Public Member Functions inherited from sensesp::TransformBase
static const std::set< TransformBase * > & get_transforms ()
 
static void clear_registry ()
 
- Protected Attributes inherited from sensesp::Saveable
const String config_path_
 
- Protected Attributes inherited from sensesp::ValueProducer< T >
output_
 

Detailed Description

Transforms its input into frequency (Hz: cycles per second)

Divides its input value by the time elapsed since the last reading.

Parameters
multiplierOutput is multiplied by this parameter before being output, as a way to adjust the scale of the ouput. For example, if you're calculating the frequency of engine revolutions and you're sensing 4 signals per revolution (such as with 4 magnets on the flywheel), set multiplier = 0.25 to convert the total signals into "revolutions".
config_pathPath to configure this transform in the Config UI.

Definition at line 22 of file frequency.h.

Constructor & Destructor Documentation

◆ Frequency()

sensesp::Frequency::Frequency ( float  multiplier = 1,
const String &  config_path = "" 
)

Definition at line 7 of file frequency.cpp.

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Member Function Documentation

◆ from_json()

bool sensesp::Frequency::from_json ( const JsonObject &  root)
overridevirtual

Deserializes the current object data from a JsonObject.

Reimplemented from sensesp::Serializable.

Definition at line 31 of file frequency.cpp.

◆ set()

void sensesp::Frequency::set ( const int &  input)
overridevirtual

Definition at line 14 of file frequency.cpp.

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◆ to_json()

bool sensesp::Frequency::to_json ( JsonObject &  root)
overridevirtual

Serializes the current object data into a JsonObject.

Reimplemented from sensesp::Serializable.

Definition at line 26 of file frequency.cpp.


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