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-- Variables to customize ------------------------------------------------
local luxMax = 1000
local lightLevelMax = 50
local device = 'Halogene Salon'
--

-- Variables 
local currentLux = tonumber(otherdevices_svalues['Luminosite exterieure'])


t1 = os.time()
s = otherdevices_lastupdate[device] -- returns a date time like 2013-07-11 17:23:12

year = string.sub(s, 1, 4)
month = string.sub(s, 6, 7)
day = string.sub(s, 9, 10)
hour = string.sub(s, 12, 13)
minutes = string.sub(s, 15, 16)
seconds = string.sub(s, 18, 19)

t2 = os.time{year=year, month=month, day=day, hour=hour, min=minutes, sec=seconds}
difference = (os.difftime (t1, t2))

commandArray = {}


if(otherdevices['Lumière Salon Auto'] == 'On') then
	if (otherdevices['Presence']=='On' and (currentLux < luxMax) and difference >= 59) then
	  local lightLevel = currentLux * 100 / luxMax;
	  lightLevel = 100 - lightLevel;
	  lightLevel = lightLevel * lightLevelMax / 100;
	  lightLevel = math.floor(lightLevel);

	  -- print('Light : ' .. lightLevel);

	  commandArray[device] = tostring('Set Level '..lightLevel);

	elseif (otherdevices['Presence']=='On' and (currentLux < luxMax) and difference < 59) then
		commandArray['Lumière Salon Auto'] = 'Off'
	end
end


return commandArray