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After a few seconds in the sun, the display goes all glitch. I wonder if there is a temperature compensation command that I'm missing.

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The e-ink display works and pull request sent to esphome. Now it's time to futz with fonts and interface layout.

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"These aspects of cryptology are now known as `ciphony`, `cifax` and `civision`."

It's a beautiful Sunday afternoon, time to file more FOIA requests.

content warning 

everyone loves content warnings

Schematics and source code for interfacing an esp32 running esphome with the Digital Smart Meter P1 port: trmm.net/Smartmeter/

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Now the P1 power data shows up in grafana for the house dashboard.

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Without the pullup, there does not appear to be any data on the smart meter's P1 port. The documentation doesn't mention that it is open-collector output and even says the output voltage is >4V for `0`. I had to buy a €15 adapter cable and disassemble it to learn this, so I hope this information helps someone else.

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