Just to clarify (and maybe get a response), the problem occurs when using the Data window on the Dashboard to access data and attempting to download, NOT the Overview window where a Chart is displayed.
In the Overview window, using the “Download Chart Data” does work for the day, week, and 1 month intervals (haven’t tried any others). However; this method only retrieves data for the channel displayed, and more importantly, for the 1 week and 1 month period the download only includes one data point every hour. If you have a sensor that sends data each minute you will be missing 59 of the 60 data points each hour.
If I download data from the chart button for the 1 week setting I will get 7 days x 24hr/day = 168 rows of date. And if your node is sending data once per minute you will be missing 98% of your data.
So the two problems are:
Using download button from the Chart I can only retrieve one data point per hour for the 1 week and 1 month time frames, and
I cannot download the full data files from the Data tab for 1 week or one month periods because the operation times out (404 error). It does usually work for the one day period (and returns a spreadsheet with about 1,440 rows per channel of data). I have been able to successfully download an Excel spreadsheet for 1 day with four channels which had approximately 5,500 rows of data (24hr x 60min/hr x4 channels = 5,760 rows - don’t know where the other rows went).