I am trying to use an ultrasonic sensor via ESPhome to measure the level of water in a tank. Unfortunately, the sensor produces some false readings that make the gauge less than reliable when used for alerts or automations. Is there a way to “throw out” any sensor values that are a certain percentage below the previous (correct) values?
I want the sensor to remain fairly responsive - meaning I don’t want to wait to average the values over a long time to weed out the bad values because I would have to wait on the averaged value. I need to be alerted in a decent timeframe for level hikes/drops.
For example, I’d like to remove the negative spikes (red arrows) and have the chart keep the max values (red line). I hope this makes sense! Thanks!
@Hellis81 thanks for the suggestion but when I try that the severe negative spikes bring the average down enough to make it look like the reservoir level is decreasing rather rapidly. I’m hoping removing the negative spikes instead of averaging them in will produce a better representation.
Also, the example chart I posted is somewhat less “noisy” than the sensor can get sometimes.
I have the sensor value then calculated (height of reservoir 28cms - sensor reading = new value). I think condensation or perhaps something else sporadically causes reading of something over 28cms and therefore results in a negative value. I hope that makes sense.
