Electricity Meter Log

Both devices pull the cloud copy, merge it into their own and push the result back, so readings logged on the phone and on the PC while apart are combined rather than one overwriting the other. Deletions are remembered as well, which is why a reading you remove here does not reappear on the next sync. The address and key are kept in this browser only — they are never written into meter-log.json. Setup steps are in cloud\README.md.

A page can only write to a file you hand it once. Click Connect, pick meter-log.json in E:\Loggers, and from then on every change rewrites that file by itself — saves are debounced half a second, so adding several readings in a row writes once. The handle is kept in IndexedDB (it can't be stored as JSON), so the file is remembered between visits; Chrome still drops write permission on reload and will only re-ask during a click, which is what the amber Reconnect button is for. A copy of everything is mirrored into this browser's local storage as a safety net either way.

A meter that touches the threshold in any cycle is billed at the unprotected rate for that cycle and the following ones, for the length set here. Touching it again inside the window restarts the count. Set the length to 1 to penalise only the breaching cycle.

Both actions rewrite the JSON file immediately. Download a copy first if unsure.