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  • lastTime is the time in seconds at which the pin last changed state. When using edge:'rising' or edge:'falling', this is not the same as when the function was last called.

    Yes, but it's easy enough to work around?

    var lastTime;
    var RPM;
    var w=setWatch(function(e) {
      RPM = 60 / (e.time - lastTime);
      lastTime = e.time;
      {repeat: 'true', edge:'rising'}

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