78 lines
2.3 KiB
Lua
78 lines
2.3 KiB
Lua
-- As we are located in central europe, we have GMT+1
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local TIMEZONE_OFFSET_WINTER = 1
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--Summer winter time convertion
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--See: https://arduinodiy.wordpress.com/2015/10/13/the-arduino-and-daylight-saving-time/
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--
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--As October has 31 days, we know that the last Sunday will always fall from the 25th to the 31st
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--So our check at the end of daylight saving will be as follows:
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--if (dow == 7 && mo == 10 && d >= 25 && d <=31 && h == 3 && DST==1)
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--{
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--setclockto 2 am;
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--DST=0;
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--}
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--
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--To start summertime/daylightsaving time on the last Sunday in March is mutatis mutandis the same:
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--if (dow == 7 && mo == 3 && d >= 25 && d <=31 && h ==2 && DST==0)
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--{
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--setclockto 3 am;
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--DST=1;
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--}
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function getLocalTime(year, month, day, hour, minutes, seconds,dow)
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-- Always adapte the timezoneoffset:
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hour = hour + (TIMEZONE_OFFSET_WINTER)
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-- we are in 100% in the summer time
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if (month > 3 and month < 10) then
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hour = hour + 1
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-- March is not 100% Summer time, only starting at the last sunday
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elseif ((month == 3 and day >= 25 and day <= 31 and hour > 2 and dow == 7) or
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-- Only handle days after the last sunday in this month
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((month == 3 and day >= 25 and day <= 31 and dow < 7 and ((7-dow + day) > 31))) ) then
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-- set summer time
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hour = hour + 1
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-- October is not 100% Summer time, ending with the last sunday
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elseif ((month == 10 and day >= 25 and day <= 31 and hour <= 2 and dow == 7) or
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(month == 10 and day >= 25 and day <= 31 and dow < 7 and ((7-dow + day) <= 31)) or
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-- Handle all days up to the 25. of october
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(month == 10 and day < 25 )
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)then
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-- set summer time
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hour = hour + 1
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end
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return year, month, day, hour, minutes, seconds
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end
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-- Convert a given month in english abr. to number from 1 to 12.
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-- On unknown arguments, zero is returned.
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function convertMonth(str)
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if (str=="Jan") then
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return 1
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elseif (str == "Feb") then
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return 2
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elseif (str == "Mar") then
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return 3
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elseif (str == "Apr") then
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return 4
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elseif (str == "May") then
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return 5
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elseif (str == "Jun") then
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return 6
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elseif (str == "Jul") then
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return 7
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elseif (str == "Aug") then
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return 8
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elseif (str == "Sep") then
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return 9
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elseif (str == "Oct") then
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return 10
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elseif (str == "Nov") then
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return 11
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elseif (str == "Dec") then
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return 12
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else
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return 0
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end
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end
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