node-red-contrib-totaliser

Install

Run the following command in the root directory of your Node-RED install:

npm install node-red-contrib-totaliser

The totaliser node can be used to create a periodic total of an input value. This node works in three possible ways:

Accumulating Sum - Outputs the running total of the sum of every input at the end of every period. The total is not reset to zero at the start of the period
Sum - Outputs the sum of every input at the end of every period. The total is reset to zero at the start of the period
Difference - Outputs the difference between the last and the first inputs of a period, at the end of every period. This mode is useful when the input is an accumulating value such as a meter reading.