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Re:Mistral OCR by ubergeek42 on Thursday March 06, 2025 @01:43PM (#43283638)
This[1] is something I've come across but not had a chance to play with, designed for reading non-smart meters that might work for you. I'm not sure if there's any way to run it on an old phone though.

[1] https://github.com/jomjol/AI-on-the-edge-device

Re:Mistral OCR by timc3 on Thursday March 06, 2025 @04:24PM (#43285203)
I use this for a watermeter. Works quite well as long as you have a good SD card
Re:Mistral OCR by jasonjayr on Thursday March 06, 2025 @04:51PM (#43285423)
Wow. I was looking at hooking my water meter into home assistant, and was going to investigate just counting an optical pulse (it has a white portion on the gear that is in a certain spot every .1 gal) This is like the same meter I use, and perfect.

(It turns out my electric meter, though analog, blasts out it's reading on RF every 10 seconds unencrypted. I got that via my RTL-SDR reciever :) )