esp-webthing

Esp idf component for creating Mozilla WebThing

Example Projects

For sample implementations look at esp-webthing_examples .

Usage

Create Thing

Thing* createThing(const char* _title, char** _type)

Parameters:
    _title = human friendly string which describes the device
    _type  = provides the names of schemas for types of capabilities a device supports.
For more info refer : https://iot.mozilla.org/wot

Create Property

ThingProperty* createProperty(char* _title,PropertyInfo _info,PropertyChange_cb _callback)

Parameters:
    _title = human freindly string which describes the property.
    _info  = PropertyInfo structure which represents the property.
    _callback = is the callback function which will be notified whenever controls are changed . 
callback function needs to have the format `void(*function_name)(ThingPropertyValue)`

Following properties can be created

Property Type	ValueType
eALARM	BOOLEAN
eBOOLEAN	BOOLEAN
eBRIGHTNESS	NUMBER
eCOLOR	STRING
eCOLOR_TEMPERATURE	NUMBER
eCURRENT	NUMBER
eFREQUENCY	NUMBER
eHEATING_COOLING	STRING
eIMAGE	NONE
eINSTANTANEOUS_POWER	NUMBER
eLEAK	BOOLEAN
eLEVEL	NUMBER
eLOCKED	STRING
eMOTION	BOOLEAN
eON_OFF	BOOLEAN
eOPEN	BOOLEAN
ePUSHED	BOOLEAN
eTARGET_TEMPERATURE	NUMBER
eTEMPERATURE	NUMBER
eTHERMOSTAT	STRING
eVIDEO	NONE
eVOLTAGE	NUMBER

PropertyInfo structure

Property Info structure is passed as a parameter for property creation .

struct PropertyInfo
{
    ThingPropertyType type;
    ThingPropertyValue value;
    ThingPropertyValueType valueType;
    double minimum;
    double maximum;
    double multipleOf;
    bool readOnly;
    PropertyUnits unit;
}

Parameters:
    type = enum representing the property type.
    value = value of the property.
    valueType = value type can be one of the four BOOLEAN,NUMBER, STRING or NONE. 
            Refer the Property Type table for more info.
    minimum = minimum permissible value for the property . 
            Applicable only for properties which have Range type values such as Brightness etc.
    maximum = maximum permissible value for the property . 
            Applicable only for properties which have Range type values such as Brightness etc .
    readOnly = specifies if the value of property can be changed . 
            Set it to TRUE if you dont want the user to change the value of property for example readings of a sensor.
    unit = SI unit of the property .

Add Property to Thing object

void addProperty(Thing* _thing,ThingProperty* _property)

Parameters:
    _thing = pointer to the thing object 
    _property  = pointer to property object 

Adding Property to Thing

void addProperty(Thing* _thing,ThingProperty* _property)

Parameters:
    _thing = pointer to the thing object 
    _property  = pointer to property object 

Initialsing Adapter

Initialses mdns with thing details.

void initAdapter(Thing* thing)

Paremeters:
    thing = pointer to thing object.

Note: Call this before connecting ESP32 to wifi

Start Adapter

Starts the webserver and initialises the handles .

void startAdapter(Thing* thing)

Paremeters:
    thing = pointer to thing object.

Note : Call this after ESP gets connected to the wifi network

Cleanup Thing

Frees allocated memory for thing and its properties.

void cleanUpThing(Thing* thing)

Parameters:
    _thing = pointer to the thing object 

For sample implementation see : https://github.com/akshayvernekar/esp-webthing_examples