rscalc error - s0161038 - 23.01.2021
Dear all,
I just reflashed my SD card after becoming read-only (LM4). After the recovery, I updated to firmware 20200720.
After restoring my backup I noticed the common rscalc function I use to check if the sun is up is not working any more on my system.
Code: function sun_is_up()
-- returns number of minutes from 0:00 until sunrise and sunset
latitude = 57
longitude = 24.15
log('gerund')
sunrise, sunset = rscalc(latitude, longitude)
date = os.date('*t')
now = date.hour * 60 + date.min
-- from 0:00 to sunrise
if now < sunrise then
alert('before sunrise')
return false
-- from sunset to 23:59
elseif now > sunset then
alert('after sunset')
return false
else
alert('day')
return true
end
end
I always get the following error:
Common functions:7: attempt to call global 'rscalc' (a nil value)
stack traceback:
Does anybody have an idea what this is causing?
Or does anybody know where the sourcecode of rscalc can be found to check what is going wrong?
thanks
RE: rscalc error - buuuudzik - 23.01.2021
You don't have in "Common functions" rscalc function. I've copied it from my LM (I don't know why, maybe it is not included in backup):
Code: -- sunrise / sunset calculation
function rscalc(latitude, longitude, when)
local pi = math.pi
local doublepi = pi * 2
local rads = pi / 180.0
local TZ = function(when)
local ts = os.time(when)
local utcdate, localdate = os.date('!*t', ts), os.date('*t', ts)
localdate.isdst = false
local diff = os.time(localdate) - os.time(utcdate)
return math.floor(diff / 60) / 60
end
local range = function(x)
local a = x / doublepi
local b = doublepi * (a - math.floor(a))
return b < 0 and (doublepi + b) or b
end
when = when or os.date('*t')
local y2k = { year = 2000, month = 1, day = 1 }
local y2kdays = os.time(when) - os.time(y2k)
y2kdays = math.ceil(y2kdays / 86400)
local meanlongitude = range(280.461 * rads + 0.9856474 * rads * y2kdays)
local meananomaly = range(357.528 * rads + 0.9856003 * rads * y2kdays)
local lambda = range(meanlongitude + 1.915 * rads * math.sin(meananomaly) + rads / 50 * math.sin(2 * meananomaly))
local obliq = 23.439 * rads - y2kdays * rads / 2500000
local alpha = math.atan2(math.cos(obliq) * math.sin(lambda), math.cos(lambda))
local declination = math.asin(math.sin(obliq) * math.sin(lambda))
local LL = meanlongitude - alpha
if meanlongitude < pi then
LL = LL + doublepi
end
local dfo = pi / 216.45
if latitude < 0 then
dfo = -dfo
end
local fo = math.min(math.tan(declination + dfo) * math.tan(latitude * rads), 1)
local ha = 12 * math.asin(fo) / pi + 6
local timezone = TZ(when)
local equation = 12 + timezone + 24 * (1 - LL / doublepi) - longitude / 15
local sunrise, sunset = equation - ha, equation + ha
if sunrise > 24 then
sunrise = sunrise - 24
end
if sunset > 24 then
sunset = sunset - 24
end
return math.floor(sunrise * 60), math.ceil(sunset * 60)
end
RE: rscalc error - s0161038 - 23.01.2021
(23.01.2021, 12:48)buuuudzik Wrote: You don't have in "Common functions" rscalc function. I've copied it from my LM (I don't know why, maybe it is not included in backup):
Code: -- sunrise / sunset calculation
function rscalc(latitude, longitude, when)
local pi = math.pi
local doublepi = pi * 2
local rads = pi / 180.0
local TZ = function(when)
local ts = os.time(when)
local utcdate, localdate = os.date('!*t', ts), os.date('*t', ts)
localdate.isdst = false
local diff = os.time(localdate) - os.time(utcdate)
return math.floor(diff / 60) / 60
end
local range = function(x)
local a = x / doublepi
local b = doublepi * (a - math.floor(a))
return b < 0 and (doublepi + b) or b
end
when = when or os.date('*t')
local y2k = { year = 2000, month = 1, day = 1 }
local y2kdays = os.time(when) - os.time(y2k)
y2kdays = math.ceil(y2kdays / 86400)
local meanlongitude = range(280.461 * rads + 0.9856474 * rads * y2kdays)
local meananomaly = range(357.528 * rads + 0.9856003 * rads * y2kdays)
local lambda = range(meanlongitude + 1.915 * rads * math.sin(meananomaly) + rads / 50 * math.sin(2 * meananomaly))
local obliq = 23.439 * rads - y2kdays * rads / 2500000
local alpha = math.atan2(math.cos(obliq) * math.sin(lambda), math.cos(lambda))
local declination = math.asin(math.sin(obliq) * math.sin(lambda))
local LL = meanlongitude - alpha
if meanlongitude < pi then
LL = LL + doublepi
end
local dfo = pi / 216.45
if latitude < 0 then
dfo = -dfo
end
local fo = math.min(math.tan(declination + dfo) * math.tan(latitude * rads), 1)
local ha = 12 * math.asin(fo) / pi + 6
local timezone = TZ(when)
local equation = 12 + timezone + 24 * (1 - LL / doublepi) - longitude / 15
local sunrise, sunset = equation - ha, equation + ha
if sunrise > 24 then
sunrise = sunrise - 24
end
if sunset > 24 then
sunset = sunset - 24
end
return math.floor(sunrise * 60), math.ceil(sunset * 60)
end
Thanks, just what i was missing.
RE: rscalc error - buuuudzik - 23.01.2021
Perfect
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