I am reading the weight given by a scale through the serial port. The scale transmits the weight value in a ratio of 10 measures per second (approx.), and I put both the weight value and the time of lecture into the object.
I want to obtain the mass flow (in kg/hour or gr/min, or whatever), and to do that I have to compare two different outputs (different events), but I don't know how to do it in Node-RED.
Can you give any idea?