Thanks for the answer. Have no access to that mysql files but seems it would not work either as mysql data has repeated times with the same or different data, many from network retries of my posting devices along the years and it seem that phptimeseries can only have unique time stamps.
Meantime tried the conversion script and it’s painfully slow. Tracked to the phptimeseries engine that keeps opening and closing the file for write at each row post.
I’m now trying a direct approach writing directly from the convert loop instead of using the engine. It’s 20x faster.

Edit
Here is the convert script i’ve used for others who need it:

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