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Question for experts: I'm on SDG&E (North County San Diego) and apparently have a smart meter that supports HAN at 900 MHz, but at the end of last year SDG&E declared "no new devices [HAN devices] can be connected". Does this mean that if I want to monitor my electricity use that I’m out of luck?

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A lot of smart meters also have a simple LED pulse output, that you can read with a light sensor.

That was just for local real-time monitoring iirc, using eg an Emporia Vue. I think you can still get the data from their website.

SDG&E supports "Green Button" downloads, but I wonder how long that will last — the links in the "Apps" section of https://www.energy.gov/data/green-button are dead, the official GitHub repo and Green Button Alliance repo appear to have gone into a coma around 2015, and Wikipedia doesn't have an entry for it.

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