Create a virtual data point

Here's how to do it

1. Go to Configuration and select Data Points.

2. Click Add Data Point.

3. Select a virtual interface.

4. Enter the parameters used to create the virtual data point.

5. Save the data point.

Merge multiple data points

Select the data points to be used as a basis, and enter a JavaScript expression to process the values.

To reference the values, use index values in the values variable.

In the example, the difference between room temperature and the setpoint is calculated by subtracting the setpoint from the temperature.

Use as a data store

You can also create a virtual data point as a data store. You can
then write data to the data point and use a JavaScript expression to process the value.

In this type of expression, the variable `value` is used.

The example shows that the value is divided by 10 before being stored.