Just to add - since the Espruino Pico can now do HTTPS, it might be that you can communicate directly with the spreadsheet?
@Gordon started
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Just to add - since the Espruino Pico can now do HTTPS, it might be that you can communicate directly with the spreadsheet?