Sorry raptile. I can't reply to your p.m. yet because I'm too new on the forum.
Here is my version of the script so you can use the openweahtermaps and your own sensors.
I use the cloud information from the open wheathermaps and the baro pressure from my zigbee sensor.
Code: Select all
--[[
Prerequisits
==================================
Requires Domoticz v3.8551 or later
Platform dependent, requires Linux
CHANGE LOG: See http://www.domoticz.com/forum/viewtopic.php?t=19220
Virtual Lux sensor and other real-time solar data
-- Authors ----------------------------------------------------------------
V1.0 - Sébastien Joly - Great original work
V1.1 - Neutrino - Adaptation to Domoticz
V1.2 - Jmleglise - An acceptable approximation of the lux below 1° altitude for Dawn and dusk + translation + several changes to be more userfriendly.
V1.3 - Jmleglise - No update of the Lux data when <=0 to get the sunset and sunrise with lastUpdate
V1.4 - use the API instead of updateDevice to update the data of the virtual sensor to be able of using devicechanged['Lux'] in our scripts. (Due to a bug in Domoticz that doesn't catch the devicechanged event of the virtual sensor)
V1.5 - xces - UTC time calculation.
V2.0 - BakSeeDaa - Converted to dzVents and changed quite many things.
v3.0 - Bram Vreugdenhil Converted from Weather underground api calls to data of domoticz devices so you can use OpenWeathermaps sensors or own sensors
]]--
-- Input devices . You can use Openweathermap devices for it. Just add "Open Weather Map" in the hardware setup.
local idxCloudCover = 78 -- (Integer) Device ID of device holding cloudcoverage
local idxBarometer = 75 -- (Integer) Device ID of device barometric presusure
-- Variables to customize (can be nil )------------------------------------------
local idxSolarAzimuth = 1997 -- (Integer) Virtual Azimuth Device ID
local idxSolarAltitude = 1998 -- (Integer) Your virtual Solar Altitude Device ID
local idxRadiation = 1999 -- (Integer) Domoticz virtual Radiation device ID
local idxLux = 1996 -- (Integer) Domoticz virtual Lux device ID
local logToFile = false -- (Boolean) Set to true if you also wish to log to a file. It might get big by time.
local tmpLogFile = '/tmp/logSun.txt'-- Logging to a file if specified
local fetchIntervalMins = 5 -- (Integer) (Minutes, Range 5-60) How often Wunderground API is called
local latitude = 51.9891087 -- Latitude. (Decimal number) Decimal Degrees. E.g. something like 51.748485
local longitude = 4.1554187000 -- Longitude. (Decimal number) Decimal Degrees. E.g.something like 5.629728.
local altitude = 1 -- Altitude. (Integer) Meters above sea level.
-- Please don't make any changes below this line (Except for setting logging level)
local scriptVersion = '3'
return {
active = true,
logging = {
--level = domoticz.LOG_DEBUG, -- Uncomment to override the dzVents global logging setting
marker = 'SOLAR '..scriptVersion
},
on = {
timer = {'every 5 minutes'}
},
data = {
lastOkta = {initial=0},
lastOgimetTime = {initial='198001010000'}
},
execute = function(domoticz, device)
local function leapYear(year)
return year%4==0 and (year%100~=0 or year%400==0)
end
local arbitraryTwilightLux = 6.32 -- W/m² egal 800 Lux (the theoritical value is 4.74 but I have more accurate result with 6.32...)
local constantSolarRadiation = 1361 -- Solar Constant W/m²
local relativePressure = domoticz.devices(idxBarometer).barometer
local year = os.date('%Y')
local numOfDay = os.date('%j')
local nbDaysInYear = (leapYear(year) and 366 or 365)
local angularSpeed = 360/365.25
local declination = math.deg(math.asin(0.3978 * math.sin(math.rad(angularSpeed) *(numOfDay - (81 - 2 * math.sin((math.rad(angularSpeed) * (numOfDay - 2))))))))
local timeDecimal = (os.date('!%H') + os.date('!%M') / 60) -- Coordinated Universal Time (UTC)
local solarHour = timeDecimal + (4 * longitude / 60 ) -- The solar Hour
local hourlyAngle = 15 * ( 12 - solarHour ) -- hourly Angle of the sun
local sunAltitude = math.deg(math.asin(math.sin(math.rad(latitude))* math.sin(math.rad(declination)) + math.cos(math.rad(latitude)) * math.cos(math.rad(declination)) * math.cos(math.rad(hourlyAngle))))-- the height of the sun in degree, compared with the horizon
local azimuth = math.acos((math.sin(math.rad(declination)) - math.sin(math.rad(latitude)) * math.sin(math.rad(sunAltitude))) / (math.cos(math.rad(latitude)) * math.cos(math.rad(sunAltitude) ))) * 180 / math.pi -- deviation of the sun from the North, in degree
local sinAzimuth = (math.cos(math.rad(declination)) * math.sin(math.rad(hourlyAngle))) / math.cos(math.rad(sunAltitude))
if(sinAzimuth<0) then azimuth=360-azimuth end
local sunstrokeDuration = math.deg(2/15 * math.acos(- math.tan(math.rad(latitude)) * math.tan(math.rad(declination)))) -- duration of sunstroke in the day . Not used in this calculation.
local RadiationAtm = constantSolarRadiation * (1 +0.034 * math.cos( math.rad( 360 * numOfDay / nbDaysInYear ))) -- Sun radiation (in W/m²) in the entrance of atmosphere.
-- Coefficient of mitigation M
local absolutePressure = relativePressure - domoticz.utils.round((altitude/ 8.3),1) -- hPa
local sinusSunAltitude = math.sin(math.rad(sunAltitude))
local M0 = math.sqrt(1229 + math.pow(614 * sinusSunAltitude,2)) - 614 * sinusSunAltitude
local M = M0 * relativePressure/absolutePressure
domoticz.log('', domoticz.LOG_INFO)
domoticz.log('============== SUN LOG ==================', domoticz.LOG_INFO)
--domoticz.log(city .. ', latitude: ' .. latitude .. ', longitude: ' .. longitude, domoticz.LOG_INFO)
--domoticz.log('Home altitude = ' .. tostring(altitude) .. ' m', domoticz.LOG_DEBUG)
domoticz.log('Angular Speed = ' .. angularSpeed .. ' per day', domoticz.LOG_DEBUG)
domoticz.log('Declination = ' .. declination .. '°', domoticz.LOG_DEBUG)
domoticz.log('Universal Coordinated Time (UTC) '.. timeDecimal ..' H.dd', domoticz.LOG_DEBUG)
domoticz.log('Solar Hour '.. solarHour ..' H.dd', domoticz.LOG_DEBUG)
domoticz.log('Altitude of the sun = ' .. sunAltitude .. '°', domoticz.LOG_INFO)
domoticz.log('Angular hourly = '.. hourlyAngle .. '°', domoticz.LOG_DEBUG)
domoticz.log('Azimuth of the sun = ' .. azimuth .. '°', domoticz.LOG_INFO)
domoticz.log('Duration of the sun stroke of the day = ' .. domoticz.utils.round(sunstrokeDuration,2) ..' H.dd', domoticz.LOG_DEBUG)
domoticz.log('Radiation max in atmosphere = ' .. domoticz.utils.round(RadiationAtm,2) .. ' W/m²', domoticz.LOG_DEBUG)
domoticz.log('Local relative pressure = ' .. relativePressure .. ' hPa', domoticz.LOG_DEBUG)
domoticz.log('Absolute pressure in atmosphere = ' .. absolutePressure .. ' hPa', domoticz.LOG_DEBUG)
domoticz.log('Coefficient of mitigation M = ' .. M ..' M0 = '..M0, domoticz.LOG_DEBUG)
-- In meteorology, an okta is a unit of measurement used to describe the amount of cloud cover
-- at any given location such as a weather station. Sky conditions are estimated in terms of how many
-- eighths of the sky are covered in cloud, ranging from 0 oktas (completely clear sky) through to 8 oktas
-- (completely overcast). In addition, in the synop code there is an extra cloud cover indicator '9'
-- indicating that the sky is totally obscured (i.e. hidden from view),
-- usually due to dense fog or heavy snow.
Cloudpercentage = domoticz.devices(idxCloudCover).percentage
okta = Cloudpercentage/12.5
local Kc = 1-0.75*math.pow(okta/8,3.4) -- Factor of mitigation for the cloud layer
local directRadiation, scatteredRadiation, totalRadiation, Lux, weightedLux
if sunAltitude > 1 then -- Below 1° of Altitude , the formulae reach their limit of precision.
directRadiation = RadiationAtm * math.pow(0.6,M) * sinusSunAltitude
scatteredRadiation = RadiationAtm * (0.271 - 0.294 * math.pow(0.6,M)) * sinusSunAltitude
totalRadiation = scatteredRadiation + directRadiation
Lux = totalRadiation / 0.0079 -- Radiation in Lux. 1 Lux = 0,0079 W/m²
weightedLux = Lux * Kc -- radiation of the Sun with the cloud layer
elseif sunAltitude <= 1 and sunAltitude >= -7 then -- apply theoretical Lux of twilight
directRadiation = 0
scatteredRadiation = 0
arbitraryTwilightLux=arbitraryTwilightLux-(1-sunAltitude)/8*arbitraryTwilightLux
totalRadiation = scatteredRadiation + directRadiation + arbitraryTwilightLux
Lux = totalRadiation / 0.0079 -- Radiation in Lux. 1 Lux = 0,0079 W/m²
weightedLux = Lux * Kc -- radiation of the Sun with the cloud layer
elseif sunAltitude < -7 then -- no management of nautical and astronomical twilight...
directRadiation = 0
scatteredRadiation = 0
totalRadiation = 0
Lux = 0
weightedLux = 0 -- should be around 3,2 Lux for the nautic twilight. Nevertheless.
end
totalRadiation=totalRadiation*Kc
domoticz.log('Okta = '..okta.. ' Cloud coverage = ' ..Cloudpercentage .. '%', domoticz.LOG_INFO)
domoticz.log('Kc = ' .. Kc, domoticz.LOG_DEBUG)
domoticz.log('Direct Radiation = '.. domoticz.utils.round(directRadiation,2) ..' W/m²', domoticz.LOG_INFO)
domoticz.log('Scattered Radiation = '.. domoticz.utils.round(scatteredRadiation,2) ..' W/m²', domoticz.LOG_DEBUG)
domoticz.log('Total radiation = ' .. domoticz.utils.round(totalRadiation,2) ..' W/m²', domoticz.LOG_INFO)
domoticz.log('Total Radiation in lux = '.. domoticz.utils.round(Lux,2)..' Lux', domoticz.LOG_DEBUG)
domoticz.log('Total weighted lux = '.. domoticz.utils.round(weightedLux,2)..' Lux', domoticz.LOG_INFO)
-- No update if Lux is already 0. So lastUpdate of the Lux sensor will keep the time when Lux has reached 0.
-- (Kind of timeofday['SunsetInMinutes'])
if idxLux and domoticz.devices(idxLux).lux + domoticz.utils.round(weightedLux, 0) > 0 then
domoticz.devices(idxLux).updateLux(domoticz.utils.round(weightedLux,0))
end
if(idxSolarAzimuth) then
domoticz.devices(idxSolarAzimuth).updateCustomSensor(domoticz.utils.round(azimuth,0))
end
if(idxSolarAltitude) then
domoticz.devices(idxSolarAltitude).updateCustomSensor(domoticz.utils.round(sunAltitude,0))
end
-- No update if radiation is already 0. See LUX
if idxRadiation and (domoticz.devices(idxRadiation).rawData[1] + domoticz.utils.round(totalRadiation, 2) > 0) then
domoticz.devices(idxRadiation).updateCustomSensor(domoticz.utils.round(totalRadiation,2))
end
if logToFile then
local logDebug = os.date('%Y-%m-%d %H:%M:%S',os.time())
logDebug=logDebug..' Azimuth:' .. azimuth .. ' Height:' .. sunAltitude
logDebug=logDebug..' Okta:' .. okta..' KC:'.. Kc
logDebug=logDebug..' Direct:'..directRadiation..' inDirect:'..scatteredRadiation..' TotalRadiation:'..totalRadiation..' LuxCloud:'.. domoticz.utils.round(weightedLux,2)
os.execute('echo '..logDebug..' >>'..tmpLogFile) -- compatible Linux & Windows
end
end
}
Looking at your last screenshot, 18k lux for 58% of cloud coverage could be good 
