Japie wrote: > On Wed, 27 Dec 2006 07:02:56 -0500, Paul Alfille wrote: > > >> power washer >> > > "power", that sounds good... ;-) > > >> I assume you're not going to do this with a bash script (not very efficient) >> but the general idea could be: >> >> while (1) ; do >> echo `date` >> log >> echo temperature >>log >> echo humidity >>log >> echo counter>>log >> sleep(.01) >> done >> >> Clearly date doesn't give the resolution you'd want, and in a >> C/perl/python/php/tcl program or the like you could maintain a persistent >> connection, have better control over timing, and even keep the data in RAM >> till the end of the logging session. >> > > Keeping it in RAM would be hard I think since embedded devices don't have > a lot of it, depends on the amount of data collected. > Anyway, that's all in software. > It looks to me that owfs/1wire can be treated like any other proc system > (unless I misunderstood) so gathering the data is quite easy. > I will start by gathering the hardware and mounting that together and will > see about implementation afterwards. (a lot of ways leading to Rome) I > will try to document my steps and will publish them on > http://www.minimumrisk.nl for the public. I would like to thank all of you > for your help and input so far and wish you all a happy 2007! >
A couple more things before I shut up. I would move toward owpython or owperl and away from shell access. Since you are pushing the speed, the time to run each command could get in your way. I'm a python preferrer, and working with ow is very nice in that thanks to Peter's interface. I think owperl would be similarly easy if you are more comfortable in perl. I think the humidity sensor in the intake header will be a bit challenging. You have to make sure that the sensor surface never gets a droplet of water on it. Also, they tend to be slow in reacting to humidity changes. IIRC, the 63% reading point is 15-30s out (if you change the humidity from 0% to 100%, the reading will reach 63% after 15-30s.) I'm sure that there will be different materials with different response times and this might be out of date, your experimentation will have to see how well it works. happy new year to you too. jerry ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys - and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
