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I’m measuring AC. I’m filtering in software, using libraries that are pretty solid but I can’t find the code right now but it was based in this library https://github.com/RobTillaart/ACS712. I tried measuring the average values in chunks of 1000, reading every X seconds, Kalman filters… At the end, I was just reading raw values from the GPIO, calculating the average of 5 and printing it in esphome, but the values were not coherent at all. I never get a 0 value. On the electronic side, I tried with a voltage divider even if it’s not required but also without it. However I can try again if you know something worth to try.