cap:power-consumed - read power consumed

This capability is used to mark sensors that report power consumed by something.

if(thing.matches('cap:power-consumed')) {
        const powerConsumed = await thing.powerConsumed();
        console.log('Power consumed:', powerConsumed.wattHours);
}

API

powerConsumed()

Get the current amount of power consumed. .

Returns:Promise that resolves to the amount of power consumed as energy.

Example:

const powerConsumed = await thing.powerConsumed();
console.log('Power consumed:', powerConsumed.wattHours);

Events

powerConsumedChanged

The amount of power consumed has changed. Payload is the power consumed as energy.

Example:

thing.on('powerConsumedChanged', v => console.log('Changed to:', v));

Protected methods

updatePowerConsumed(value)

Update the power consumed. Should be called whenever a change is detected.

Arguments:

• value – The new amount of power consumed, as energy. The default unit is joules.

Example:

const { energy } = require('abstract-things/values');
this.updatePowerConsumed(energy(0.5, 'wh'));

Implementing capability

Implementors of this capability should call updatePowerConsumed whenever the power consumed changes.

const { Sensor, PowerConsumed } = require('abstract-things/sensors');

class Example extends Sensor.with(PowerConsumed) {

        constructor() {
                super();

                this.updatePowerConsumed(10); // Joules
        }

}