3.1 - Customising Charts
The Telemetry2u.com IoT Charts page is available to all users and provides a simple way to to visualise your data history. It also includes a few control options and your sensors statistics. They offer a lot of flexability and information with each page set-up unique to each user, so any changes you make will not affect any other accounts.
The chart menu is always visible on the top of the charts page. The IoT Charts page will always load the last configuration from the previous session. To select a new chart, you must do so from the ‘Node:’ Drop down box. You can only load data from one node at a time, but it is possible to view multiple sensors from the same node on the IoT Charts page. The sensor list will vary from node to node depending on what sensors are fitted and what ’Device Configuration' was selected in the Node Maintenence Section.
By default, the date range on the IoT Charts page is set from ‘todays date’, to ‘tomorrows date’ meaning it will show all data from your current time back to 12am. You can quickly view a longer data history by clicking on the appropriate ‘Range:’ buttons, where you have a choice from 1-day, 2-days, 1-week, 2-weeks, or a month. These buttons always work backwards from the selected end date, so they basically change the start date automatically, allowing you to quickly shift backwards in time. It is possible to view a custom date range by manually changing your start and end date and clicking the ‘Custom Range’ button. Please note there is a display limit of 10,000 records to ease server load.
You can select how many charts you would like to see on the charts page by changing the ‘Max charts:’ field. This will determine how your selected sensors will be plotted. If the ‘Max Charts:’ were set to one, and you had three sensors selected, all three sensors would be displayed on one graph. If your ‘Max Charts:’ was set to three, each sensor would be displayed on its own graph. This allows you to customise your graph in nearly any combination.
The Statistics show the current/latest sensor readings as well as the minimum, maximum and averaged readings for the selected period. If an audit report has been set up and the lines are plotted on the chart, you will also see the upper and lower limit.
Data points are usually marked with a circe.
Points marked with a Triangle indicate that a sensor is in alert or was in Alert at the time of transmission. You can hover over a single point to show the exact value for that time.
You can hover over a single point / to show the exact value for that time.
It is possible to zoom in on a section of data by dragging the mouse over the chart. It will zoom in on all sensors displayed on that chart but will not affect any other charts on the page. Once you have zoomed in on a chart, a ‘Reset Zoom’ button will appear on the top left corner of the chart.
The blue and red lines on the chart make it easy to see if the sensor was within your defined limits. The value of these lines comes from the values configured in your audit reports. If there is more than one audit report set up, both the highest and lowest value from either audit report is used. If no audit reports have been set-up, no lines will be displayed for that sensor on your chart. You can read more about audit reports here.