include "curves.lib" 

function main (userId)
    local SAFE_VALUE = 10 
    local curHour = tonumber( os.date("*t", os.time()).hour ) 
    INFO("curHour "  .. curHour)
    local y, valueOutOfRange = getCurveValue("curve_for_curHour", curHour)
    
    if (not valueOutOfRange) then
        W("value_for_curHour", y)  -- WriteReg
    else
        W("value_for_curHour", SAFE_VALUE)
    end
end