Hi,
I want to read the rpm s from a EC (Electronically Commutated) fan.
I did it with a python script but I was wondering the best way to do it in NodeRed.
I don t realise how to get the pulses for minute using the raspberry nodes... My plan is to control 4 fan with one raspberry.
The tachometer info says : Tach output: open collector, 1 pulse per revolution, electrically isolated.
Thank you and happy new year everybody!
Did you ever figure out how to achieve this?
I would like to also control 4 x EC Fans from a Raspberry Pi 4B and also read the Tachometer Open Collector Signal and display it in Node RED using a Gauge on the UI.
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