Integration - Riemann sum integral

The integration platform provides the Riemann sum of the values provided by a source sensor. The Riemann sum is an approximation of an integral by a finite sum. The integration sensors is updated upon changes of the source. Fast sampling source sensors provide better results. In this implementation, the default is the Trapezoidal method, but Left and Right methods can optionally be used.


To enable Integration Sensor in your installation, add the following to your configuration.yaml file:

# Example configuration.yaml entry
  - platform: integration
    source: sensor.current_power

Configuration Variables

source string Required

The entity ID of the sensor providing numeric readings.

name string (Optional, default: source entity ID meter)

Name to use in the frontend.

round integer (Optional, default: 3)

Round the calculated integration value to at most N decimal places.

unit_prefix string (Optional, default: None)

Metric unit to prefix the integration result. Available units are k, M, G and T.

unit_time string (Optional, default: h)

SI unit of time to integrate over. Available units are s, min, h and d.

method string (Optional, default: trapezoidal)

Riemann sum method to be used. Available methods are trapezoidal, left and right.

In case you have an appliance which produces spikey consumption (like an on/off electrical boiler) you should opt for the left method to get accurate readings.

The unit of source together with unit_prefix and unit_time is used to generate a unit for the integral product (e.g. a source in W with prefix k and time h would result in kWh). Note that unit_prefix and unit_time are also relevant to the Riemann sum calculation.


An integration sensor is quite useful in energy billing scenarios since energy is generally billed in kWh and many sensors provide power in W (Watts).

If you have a sensor that provides you with power readings in Watts (uses W as unit_of_measurement), then you can use the integration sensor to track how much energy is being spent. Take the next configuration as an example:

  - platform: integration
    source: sensor.current_power
    name: energy_spent
    unit_prefix: k
    round: 2

This configuration will provide you with sensor.energy_spent which will have your energy in kWh.