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Updated installation description.

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1 parent 97a8e2b commit df9be5ea6563b2a8b085388e94fc507ea36ae570 @millerlp committed Jun 10, 2012
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@@ -3,13 +3,46 @@ Tide_controller
Arduino code and associated files for building an aquarium tide height controller.
-The R script files found here were originally used for parsing XTide's harmonics file
-to extract the equilibrium conditions, lunar node factors, speeds, and harmonic
-constituents for a chosen site. Those scripts culminate by producing output code that
-can be copied and pasted into the Arduino .ino program so that tide predictions can be
-made for the chosen site. In lieu of doing all of that in the future, it would also be
-possible to extract the relevant Amplitude and kappa (a.k.a Phase) values for a new
-NOAA tide site. There are generally 37 such values, and they can be put into the
-Arduino code, replacing the current Amp and Kappa values. Note that NOAA's ordering of
-harmonic constituents is different than that used in the Arduino programs, so you will
-need to re-order the NOAA values when substituting them into the Arduino program.
+To simply calculate real-time tide height for a site, install the following:
+Copy the RTClib folder into Arduino/libraries/
+Copy the folder with the library for your site (i.e. TideMontereyHarborlib) into Arduino/libraries/
+Copy the Tide_calculator folder (most recent version) into your Arduino folder where
+your other sketches are normally stored (not in the libraries folder).
+Open the Tide_calculator sketch in the Arduino IDE, and make sure the correct tide site
+library is referenced with a line like:
+#include "TideMontereyHarborlib.h"
+Upload the program to the Arduino. Open the serial monitor to view the output.
+If the real time clock attached to the Arduino is not yet set, you need to set it
+using the RealTimeClock_reset sketch found in the folder of the same name. Upload that
+to the Arduino, and it should automatically reset the real time clock. Make sure your
+computer's clock is set to Standard Time, not Daylight Savings time (which runs Mar-Nov
+in most places). The tide prediction routine relies on the time being set to local
+standard time for your site, otherwise you won't get the current tide height out.
+If there is no folder containing a tide prediction library for your desired site, it
+will be necessary to generate a library using the R scripts found in the
+Generate_new_site_libraries directory. The harmonic data for NOAA sites are all in
+the Harmonics_20120302.Rdata file. With these data, you can generate a new library
+by running the R script tide_harmonics_library_generator.R. Inside that file, you must
+enter a name for the site you're interested in on the line
+stationID = 'Monterey Harbor'
+Change the value inside the quote marks to match your site, save the file, and run the
+script in R. It will create a new directory with the necessary library files inside that
+can be copied into the Arduino/libraries/ folder. Find the name for your site by looking
+through the XTide website
+XTide only produces harmonics for 635 reference tide stations (all others are approximated
+from these tide stations), so you need to find the nearest station listed as "Ref" on that
+page, rather than "Sub" stations.
+The other R scripts in the Generate_new_site_libraries directory could be used to make an
+updated Rdata file when XTide updates the original harmonics database and after you
+convert it to a text file using the libtcd library from the XTide site (see the notes inside
+the R scripts).

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