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You can check this app online here: https://koshka.ddns.net/pzemweb/v1.1/ (You will need Chrome browser or similar )
A web-app (web-interface) for Peacefair PZEM energy monitors.
It is loaded from https web server but works completely on a local machine with local devices and local database.
It uses Web Serial API to connect to PZEM devices and IndexedDB to store data.
JqGrid and Apexcharts used to display stored data.
This application (hopefully) supports simultaneous data exchange with multiple PZEM devices.
Web App to control Bticino MyHome using OpenWebNet
...The Grasshopper application has been tested on Lesp and LAMP+SQLite. (Both documented in following chapters).
The only requirement is that SQLite is used as a database. You can read more about this in following chapters.
Choice of MyHome Gateway
Grasshopper can communicate not only through the official Bticino Gateways (eg. MH20x / F452 / F454) but also network-connected touchscreens can be used (eg. 3,5" / 10")