Hello,if you are talking about something like the "Climatic Cabinet" demo, then it might be better to work with the class Charts::LineChart instead of the class Charts::Graph.A good starting point for working with the class Charts::LineChart is the example "ChartsDemo". If you prefer working with the class Charts::Graph, then have a look into the example "WaveformGenerator".If your question "how to add more then 1 line" means, how to show several graphs within one diagramm, then you can place several Graph objects over each other - everyone is displaying one curve. In this case, the background color and the grid lines of all overlapping charts should be set to transparent.I hope this answers your question.
The following example (taken from the "Vehicle Data Logger" demo application) shows this idea:
the Vehicle Data Logger will be part of the provided examples in one of the next versions. At the moment it is not completely cleaned and documented. Nevertheless, you can download the current version and adapt it according your needs.
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