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Sometimes it’s worthwhile keeping notes about stuff that didn’t work. This is one of those times. I’ve long wanted to get data out of my power meters, and almost five years later and having both upgraded to PLC smart meters, I decided to have another go—and failed. With my going back to work this week, I decided to pause, jot down what I know and revisit the matter later1. My specific power meter model (supplied by EDP Distribuição, now called E-Redes) is a Landis+Gyr ZCXe110CRU0L3D2.03 S3 (just...