Let's walk through the steps to access time-series data from Google Sheets and return your calculated data to eagle.io.
From your Parameter properties, choose the Security tab, enable Public Access and copy the generated link (note that this feature is available at STANDARD account levels and above):
2. Create a new Google Sheets document, select the first cell and enter the following formula (using the Link captured in Step 1):
3. Add a calculation to Column C that relies on your imported data in Column B
4. From the File menu choose Publish to the web, select Comma-separated values format and copy the generated link
5. Back in eagle.io, create a new file Data Source, choose Download via HTTP transport and enter the link captured in Step 4.
This completes the configuration steps for exposing data to Google Sheets and returning calculated values to eagle.io.
Things to consider:
The eagle.io Public Access and Google Sheets Publish to the web features allow anyone on the internet to access your data via the generated links
Google Sheets will read from your Public Access link once per hour and recalculate spreadsheet values (this rate cannot be increased)