I have added one measurement (sea temperature) to WeeWx, which I get probably only 3 times a day. How to handle such scarce data source? As there are multiple variables which should be balanced here, I would appreciate pointers. Small amount of data points makes for annoyingly slow testing.
Theoretical maximum is 6 measurements from 7:00 to 17:00 but the frequency depends on the location. Temperature will vary mostly 1 deg C between measurements, rarely 2 degs. The number of measurements may vary. I get new data when it is available and my system knows know this is a new measurement. Currently, measurements are made at 8:00, 14:00 and 15:00. I have two questions. 1) I would like normal day/week/month graphs with all points connected. Data from my weather station is saved once in 5 minutes. I use example set by pond.py to read data as extraTemp1. I see 3 ways to supply the data to pond.py. a) Save the data and have it available for only one reading. E.g. save it at 8:13, it is read by WeeWx at 8:15 and removed from pond.txt at 8:18. Until new data arrives, nothing is to be read by WeeWx into this field. I just turned this mode on to test it again. b) I could have one reading available for one hour (or some other duration). 8:00 reading is being received by my system at 8:18. I can leave it available at pond.txt for reading 60 minutes and remove it at 9:18. No data is available for reading until new data is read c) Let the data be available until replaced with the new data. This I tried last day and it makes for a very jagged and wrong plot. It keeps the last temp from yesterday (the highest) overnight and it drops suddenly at 8:00 the next morning to the lowest temperature. Logically, I should collect data using a) and have it plotted with line connected. I tried it briefly with line_gap_fraction = 0 to connect my scarce data points but I still had breaks. 2) on the index page where the current values are, I should always see the last standing value. Longest interval with no data is between 15:00 and 8:00 the next day. This is related to above methods a) and b). In the skin's index.html.tmpl I tried replacing $current.extraTemp1 with $latest.extraTemp1 but I was getting N/A. I limit yscale to something like 15,25,1 to see the trends better. Maybe I was to quick in testing a) and something did not refresh or regenerate. Since multiple features need to be balanced, I may have failed to see the desired result using method a) which I am retesting again. -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to weewx-user+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/a0cb5a23-f0dd-494f-99cf-6f0a69bdaddc%40googlegroups.com.
