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Press UP arrow button to display previous day. Press DOWN arrow button to display next day. Press LEFT arrow button to display earlier time. Press RIGHT arrow button to display later time. Hold down LEFT or RIGHT arrow buttons to navigate time section more quickly. Press PAGE button to cycle among current page and next page(s) of additional sensors. Press CALENDAR button to select date. Press LEFT or RIGHT arrow button to select month, day, year. The selected item will flash. Press UP or DOWN arrow button to change month, day, year. Press CALENDAR button to deselect date and display info. If the user navigates to "MONTH YEAR", the monthly min/max and weekly min/maxes would be displayed. When new sensor readings are recorded, the time section should automatically slide left. If the user leaves the historical screen, it will revert to current month, day, year and time.
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If Fine Offset released a touch screen display, you could touch the date or the calendar icon to display a popup calendar. Touch the month to display monthly/weekly data. Touch the date to display daily data. Touch the year to display yearly/monthly data. Press the left/right arrows to select month/year. The rain indicator would appear above dates that had rainfall.
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The display could communicate with a smart switch, to turn on an irrigation pump or sprinkler system, if the WH51(soil moisture sensor) reading is below a certain level. It could turn on a sump pump or turn off a smart valve with flow sensor, if the WH55(leak detector) detects water.
Fewer points of failure, result in a more reliable and secure system.
Display -> Wifi Router -> Internet -> Ambient Website -> IFTTT Website -> Smart switch
vs
Display -> Wifi Router -> Smart switch
or
Display -> Smart switch
Poll