brian150509

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• getTime() not consistently reporting correct time information.

  @brian150509 started

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• getTime() not consistently reporting correct time information.

  in Puck.js, Pixl.js and MDBT42 • 2 years, 1 month

  

  Thanks. That worked too. I had written a workaround to say if the reading was too small then skip. But denounce:20 accomplishes the same thing. Thank you.

• getTime() not consistently reporting correct time information.

  in Puck.js, Pixl.js and MDBT42 • 2 years, 1 month

  

  Think I solved the problem by calling clearWatch(). Will keep you posted.

• getTime() not consistently reporting correct time information.

  in Puck.js, Pixl.js and MDBT42 • 2 years, 1 month

  

  I've tried creating an electric pulse meter with the puck js 2.1 The code works on occasion but then starts reporting funny values for watts. The general idea of the code is to get the current time, compare it with the previous time of the last pulse and use the time difference to calculate the watts. Sometimes however, even though i can tell from the logs that say the last pulse time was 12 or so seconds ago, the calculation only reads .01 of a second therefore throwing the calculation off. It's not consistent, sometimes it gets it bang on, other times not. For instance I ran it yesterday for the first time, it seem to run fine for a few hours but then started reporting erroneous values. When i ran updated code 10 minutes ago with better logging, i can see that every second reading is correct. Note originally i was using Date.now() for the time, but then tried getTime() to see if it would fix the issue, but it did not. Please see logs and code below.

  var watthours = 0;
  var lastpulse = getTime();
  var watts = 0;
  var battery = Puck.getBatteryPercentage();
  var debug = 1;
  
  function advertise() {
  	NRF.setAdvertising([
  		0x0e, 0xff, 0xa0, 0x83, 
  		watthours, watthours >> 8, watthours >> 16, watthours >> 24,
  		watts, watts >> 8, // current usage
  		battery, // battery %
  		0x00, 0x00, 0x00, 0x00
  	], {
  		name: "The Q Meter 3000",
  		interval: 600
  	});
  }
  
  function calculate() {
  	var now = getTime();
  	var pulsetime = now - lastpulse;
  
  	if (debug) {
  		console.log(`\n${now} now`);
  		console.log(`${pulsetime} pulse time`);
  		console.log(`${lastpulse} last pulse`);
  	}
  	lastpulse = now;
  	watts = 3600 / pulsetime;
  	watts = Number(watts.toFixed(0));
  	if (debug) {
  		console.log(`${watts} watts`);
  		console.log(`${watthours} watt hours`);
  		console.log(`${battery}% battery`);
  	}
  }
  
  
  // Set up pin states
  D1.write(0);
  pinMode(D2, "input_pullup");
  
  // Watch for pin changes
  setWatch(function(e) {
  	watthours++;
  
  	if (watthours % 720 == 0) {
  		battery = Puck.getBatteryPercentage();
  	}
  
  	calculate();
  
  	if (watthours > 2) {
  		advertise();
  	}
  }, D2, {
  	repeat: true,
  	edge: "falling"
  });
  

  Here are the logs

  1666997346.05803203582 now
  0.00997924804 pulse time
  1666997346.04805278778 last pulse
  360748 watts
  122 watt hours
  76% battery
  1666997359.96943950653 now
  13.91140747070 pulse time
  1666997346.05803203582 last pulse
  258 watts
  123 watt hours
  76% battery
  1666997359.97951030731 now
  0.01007080078 pulse time
  1666997359.96943950653 last pulse
  357469 watts
  124 watt hours
  76% battery
  1666997373.88667583465 now
  13.90716552734 pulse time
  1666997359.97951030731 last pulse
  258 watts
  125 watt hours
  76% battery
  1666997373.89662456512 now
  0.00994873046 pulse time
  1666997373.88667583465 last pulse
  361855 watts
  126 watt hours
  76% battery
  1666997387.80678081512 now
  13.91015625 pulse time
  1666997373.89662456512 last pulse
  258 watts
  127 watt hours
  76% battery
  1666997387.81676006317 now
  0.00997924804 pulse time
  1666997387.80678081512 last pulse
  360748 watts
  128 watt hours
  76% battery