Viewing and Exporting Historical Data

Use the Historical Data Table on the History tab to review readings by timestamp and export data. To open it, go to Sensors, select a sensor, and click History.

The table below the chart shows historical readings as rows and columns. Timestamp is the first column; the remaining columns show selected sensor parameters, such as Temperature (°C) and Humidity (%).

1. Select parameters. Open the first dropdown above the table and choose the parameters you want to include. Unlike the chart, the table can show more than two parameters.
2. Set the date range. Click the date-and-time field and select the period to review (up to one year of available history).
3. Choose a time interval. Open the next dropdown (for example, Hourly) and select how readings are grouped.
4. Choose an aggregation type. Open the final dropdown (for example, Avg) to summarize numerical readings within each interval.
5. Read the results. Each row shows a timestamp and the corresponding parameter values. The newest rows appear first. Scroll horizontally if some columns are off-screen.

A dash (-) in a table cell means no measurement is available for that parameter and interval. Measurement units appear in column headings. If many records are available, use the table’s pagination controls to move between pages.

Important: The table and chart have independent controls. Changing the selected parameters, dates, time interval, or aggregation in the table does not change the chart’s selections, and vice versa.

1. In the Historical Data Table, select the parameters, date range, time interval, and aggregation type you need.
2. Click CSV in the upper-right corner of the table.
3. Open the downloaded file in a spreadsheet application, such as Microsoft Excel.

If the chart is empty or the table shows dashes:

1. Check that you selected the intended parameter.
2. Choose a date range when the sensor was reporting data.
3. Try a different time interval or aggregation type.
4. Check the sensor’s activity information on the Details tab if you still do not see the expected readings.

A missing value does not necessarily mean the sensor is currently offline.