I want to do this as well. I got my arduino sending temperature data to the HG serial helper (running on pc). Now I would like to display this on homepage, even better with a graph. Long term I would like a big graph showing temp and status of various arduino sensors over past 24 hours.
Eventually I want to get my arduino networked but my ethernet shield does not seem to work :-( So I tried with serial connection and quickly see the data popping up as notifications in HG.
If I want to create an arduino module, do I have to extend the SerialPort class somehow? I tried renaming the SerialPort to Arduino, and "Arduino" is not recognized.
Thanks!