Bureaucrats, dave_user, Administrators
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→Basic services
===Historical data visualization with advanced queries===
This feature allows analyzing what happened in the past. Typically, it is used to view how the legacy machines behaved when specific events occurred such as anomalies reported by the end customers.
The web interface allows defining easily advanced queries in order to select the needed data. By combining logic operators and conditions, the user can define complex criteria to isolate only the interesting data.
[[File:DAVE-IIoT-advanced-query1.png|thumb|center|600px|Advanced query]]
The outcome is a chart showing the selected variables.
[[File:DAVE-IIoT-advanced-query2.png|thumb|center|600px|Historical data visualization]]
Chart's properties can be further customized. For example, it can be zoomed in/out and each line associated with a specific variable can be turned on and off.
[[File:DAVE-IIoT-advanced-query3.png|thumb|center|600px|Historical data visualization: customizing chart properties]]
===Real-time data visualization===
This visualization is used to monitor how a device is operating in real-time by viewing how specific variables change over time. The following screenshot shows, for example, a portion of such a data stream, visualized in real-time. The screenshot refers to a browser running on a PC platform.
===Programmable alarms and notifications===