Can't get WebBLE working

I thought it was a 'driver' of some sort that enabled Web Bluetooth apps running from Chrome or Safari

It would be great if that was the case, but I think iOS is locked down enough that it isn't possible :(

That's odd about the code... Maybe you could try changing getData so it just did saveFile("blah blah", "myfile.txt") and see if that works?

I guess if not it might be something to do with WebBLE blocking file saves (in which case you could file an issue on WebBLE's GitHub page for this).

A workaround might be to actually load the data into an online spreadsheet directly... If you mashed in the code from https://developers.google.com/sheets/api/quickstart/js you might actually be able to get the web app to automatically add the new energy data to a Google Sheets spreadsheet, without the download step