CSV Recorder

The CSV process records and replays device parameters matching an address pattern expression. Each matched address becomes a column; each sampling time becomes a row.

For instance, in the screenshot above, the following configuration would recreate a CSV file on each playback of the score called /tmp/save.csv with content such as :

timestamp,/0/co2,/1/co2,/2/co2
0,0.5429007,0.6073362,0.3612722
63,0.5429007,0.6073362,0.3612722
127,0.5429007,0.6073362,0.3612722
191,0.5037621,0.42720786,0.28013167
255,0.6991433,0.42720786,0.47998703
319,0.8627539,0.42720786,0.36869702
383,0.9684921,0.42720786,0.8776827
447,0.9994888,0.42720786,0.36079046
511,0.95079887,0.42720786,0.80060333
575,0.8301902,0.42720786,0.39480355
639,0.65690416,0.42720786,0.7897841

Controls and replay

Interval sets the sampling interval with a Time Chooser. The recording samples current parameter values at that interval; it is not a log of every intervening message. Timestamped uses the first column for timestamps in milliseconds. Mode selects recording, Playback or Loop. During playback, column addresses must resolve to parameters in the current device tree.

Separator selects comma, semicolon or pipe. The comma option is currently labelled Colon in the control, despite writing ,. Strings containing separators or quotes are escaped, and the player reads quoted strings and pipe-separated data back. Match the separator to the file when importing.

Filenames and takes

File pattern accepts %t, replaced by the current UTC date/time with colons changed to underscores, and %n, replaced by an available number in the resolved destination directory. A path ending in capture-%n.csv keeps separate takes; a fixed filename can be overwritten when recording starts again.

For playback, select the actual recorded filename rather than a template that generates a new name. Keep the destination directory writable and the recorded device addresses available for replay. For audio rather than device values, use Audio recorder.

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