-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Matt Sent: Wednesday, June 08, 2005 7:54 AM To: owfs-developers@lists.sourceforge.net Subject: RE: [Owfs-developers] 1wire weather station v3
Thank Peter, That looks quite elegant, I think I will use Python, with RRD, there's a Debian package available. Regarding what data is stored, for the direction, saving the 0-15 integer will be sufficient. I read an interesting article on Consensus Averaging (http://www.aagelectronica.com/aag/index.html?target=p_30.html&lang=en-us), but I think I should store the converted data (0-15) and do any averaging later. Would you agree ? Sure, or you could be more elegant, and do a weighted average by windspeed. (sum V*[sin(theta),cos(theta)]/(sum V) to get the average vector. For the wind speed, I can calculate the speed from the rotation counter, (http://www.aagelectronica.com/aag/index.html?target=p_30.html&lang=en-us). Should I store the difference between samples, the actual count digits or the calculated speed ? I'm inclined to store the difference. RRD offers you the choice, it will store that difference automatically. Thanks ________________________________ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter Kropf Sent: Wednesday, 8 June 2005 3:14 PM To: owfs-developers@lists.sourceforge.net Subject: Re: [Owfs-developers] 1wire weather station v3 Hi Matt - If you decide to explore using Python for this project, consider that you can setup a dictionary (Python's hash table) with the key being a tuple of the A, B, C, D values for very easy lookup of the direction. Something like this: direction = { (2, 4, 4, 4) : 'N', (2, 4, 4, 0) : 'NNW', (4, 4, 4, 0) : 'NW', (4, 4, 0, 0) : 'NWW', (4, 4, 0, 4) : 'W', (4, 0, 0, 4) : 'SWW', (4, 0, 4, 4) : 'SW', (0, 0, 4, 4) : 'SSW', (0, 4, 4, 4) : 'S', (0, 4, 4, 2) : 'SSE', (4, 4, 4, 2) : 'SE', (4, 4, 3, 3) : 'SEE', (4, 4, 2, 4) : 'E', (4, 3, 3, 4) : 'NEE', (4, 2, 4, 4) : 'NE', (3, 3, 4, 4) : 'NNE', } Then, a simple lookup would give you the direction for a given set of values: print direction[ ( int(A), int(B), int(C), int(D) ) ] The reason that I used the integer values instead of the floats as originally specified is because I'm not sure about any tolerance for the float values that are read and that the tuple from integer values results in a series of unique keys. Note that any tuple that's not found would result in an KeyError exception raised. If you want to avoid this, then: print directions.get( ( int(A), int(B), int(C), int(D) ), 'Unknown') will print the direction or Unknown. Also if you do go the Python route for your code, take a look at http://www.equi4.com/metakit/python.html. MetaKit provides an embedded database that's very easy to use but provides access to set arithmetic against the data without the need of SQL... - Peter On 6/4/05, Matt <[EMAIL PROTECTED]> wrote: I took more time and now see that there are 16 positions. A B C D N 2.35566 4.61546 4.61241 4.61116 NNW 2.33621 4.55952 4.56218 0.0659385 NW 4.59905 4.5828 4.58609 0.0642197 NWW 4.54929 4.54452 0.0621103 0.0647666 W 4.59999 4.58179 0.065626 4.58976 SWW 4.56851 0.0666416 0.0652354 4.54296 SW 4.59796 0.0608603 4.58374 4.58234 SSW 0.0680479 0.0581259 4.54874 4.54304 S 0.0635947 4.58179 4.58851 4.59101 SSE 0.0628135 4.56007 4.58554 2.33363 SE 4.60796 4.60702 4.60499 2.36136 SEE 4.59937 4.60163 3.16349 3.17145 E 4.62007 4.61171 2.35808 4.60921 NEE 4.61226 3.16583 3.16388 4.59976 NE 4.61484 2.35636 4.60866 4.61655 NNE 3.17927 3.16395 4.59999 4.6039 Which seems to be supported by this I found... http://www.sensorsmag.com/articles/0501/34/main.shtml Any clever way to convert values to directions ? Or do I just kludge it with many IFs and ANDs ? -----Original Message----- From: [EMAIL PROTECTED] [mailto: [EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] On Behalf Of Paul Alfille Sent: Saturday, 4 June 2005 12:14 PM To: owfs-developers@lists.sourceforge.net Subject: Re: [Owfs-developers] 1wire weather station v3 The second set of voltages is just the first set at half intensity. As I recall, the voltage range is either 0-5 or 0-2.5 and the Volts2 is the same readings interpreted over the smaller range. No additional information. On Friday 03 June 2005 07:40 pm, Matt wrote: > There appears to be 8 reed switches, and two rotating magnets arranged > adjacently. > Perhaps one is not a magnet, and just a counter weight. > > I marked one of these magnets and then rotated the vane shaft 45% and > took a reading, and repeated until the marked magnet was back to the > original position. (previous table) > > I've just checked though and there are other valuse combinations, and > also a second set of four volt values. > So perhaps there are more than eight recordable positions. > > volt.ALL 0.0658604, 0.0600009, 4.55241, 4.5428 > volt.A 0.0644541 > volt.B 0.0661729 > volt.C 4.54171 > volt.D 4.54741 > volt2.ALL 0.0352349 , 0.0302348, 0, 0 > volt2.A 0.0351568 > volt2.B 0.0298442 > volt2.C 0 > volt2.D 0 > > More research needed... > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ] On Behalf Of > Alfille, Paul H.,M.D. > Sent: Saturday, 4 June 2005 2:50 AM > To: owfs-developers@lists.sourceforge.net > Subject: RE: [Owfs-developers] 1wire weather station v3 > > Vey interesting. I'm surprised directions 5-8 don't have two channels > with non-saturated values. (A between position.) > > Paul > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] <mailto:[EMAIL PROTECTED]> ]On Behalf Of Matt > Sent: Friday, June 03, 2005 8:47 AM > To: owfs-developers@lists.sourceforge.net > Subject: RE: [Owfs-developers] 1wire weather station v3 > > > > Well, I opened it up and had a look, the 8 directions each with 4 volt > readings, translates to the following table. > > 1 2 3 4 5 6 7 8 > A *0 4.5 4.5 4.5 *2.3 4.5 4.5 4.5 > B 4.5 *0 4.5 4.5 4.5 *2.3 4.5 4.5 > C 4.5 4.5 *0 4.5 4.5 4.5 *2.3 4.5 > D 4.5 4.5 4.5 *0 4.5 4.5 4.5 *2.3 > > I notice much talk of RRD, and it does look interesting, but I was > thinking I would keep my data for many years and writing the graph > code is part of the challenge for me. > > Mysql would be my db of choice, but the interpolation features of RRD > look intriguing. > > I think I may use this project as an opportunity to play with python, > I hear nothing but praise for this language. > > > > > ------------------------------------------------------- > This SF.Net email is sponsored by Yahoo. > Introducing Yahoo! Search Developer Network - Create apps using Yahoo! > Search APIs Find out how you can build Yahoo! directly into your own > Applications - visit > http://developer.yahoo.net/?fr=fad-ysdn-ostg-q22005 <http://developer.yahoo.net/?fr=fad-ysdn-ostg-q22005> > _______________________________________________ > Owfs-developers mailing list > Owfs-developers@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/owfs-developers > > > > ------------------------------------------------------- > This SF.Net email is sponsored by: NEC IT Guy Games. How far can you > shotput a projector? How fast can you ride your desk chair down the > office luge track? 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Play to win an NEC 61" plasma display: http://www.necitguy.com/?r=20 _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers ------------------------------------------------------- This SF.Net email is sponsored by: NEC IT Guy Games. How far can you shotput a projector? How fast can you ride your desk chair down the office luge track? If you want to score the big prize, get to know the little guy. Play to win an NEC 61" plasma display: http://www.necitguy.com/?r _______________________________________________ Owfs-developers mailing list Owfs-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/owfs-developers
