My question involves time and variable (float) data used to display graph:

You say : " The current values are saved in the archive on the side of the smartphone and further participate in the construction of the graph. The archive on the smartphone also contains data from previous communication sessions with the controller, they are also displayed on the graph."

Is it possible to access data files, in order to use data:  e.g. copy the datalog file contents currently used to build the graph, or transfer it via e-mail, allowing for further use ?
How can I get the file (or files) containig "data from previous communication sessions with the controller" from the smartphone or tablet Android device?

Thanks for your kind support.