let’s say I have 2 identical microSD, in one grovepi system with sensors I have it working, sending CSV data via wifi to a website
can I just clone this microSD and plug to an identical grovepi system? will it work? I guess I need at least to update the firmware of the system or any other considerations? and what software to clone the cards?
As long as the Grovepis are running the same firmware, and you’re using compatible Raspberry Pis, then you can clone the cards and they should work just fine.
In Raspbian, there is a SD Card Copier under Accessories in the Raspbian menu. Its a fairly fast process.