Example: Real wind

A thermometer measures the actual temperature but it is not the same as the perceived temperature. To get perceived temperature you must also take the wind into account. If TellStick ZNet has an anemometer this can be used to calculate the perceived temperature.

The script below calculates this and gives the anemometer a thermometer value.

Source of the algorithm: http://www.smhi.se/kunskapsbanken/meteorologi/vindens-kyleffekt-1.259

-- EDIT THESE

local windSensor = 287
local tempSensor = 297

-- DO NOT EDIT BELOW THIS LINE

local tempValue = deviceManager:device(tempSensor).sensorValue(1, 0)
local windValue = deviceManager:device(windSensor).sensorValue(64, 0)

function calculate()
  if tempValue == nil or windValue == nil then
    return
  end
  local w = math.pow(windValue, 0.16)
  local v = 13.12 + 0.6215*tempValue - 13.956*w + 0.48669*tempValue*w
  v = math.floor(v * 10 + 0.5) / 10
  local windDevice = deviceManager:device(windSensor)
  windDevice:setSensorValue(1, v, 0)
end

function onSensorValueUpdated(device, valueType, value, scale)
  if device:id() == windSensor and valueType == 64 and scale == 0 then
    windValue = value
    calculate()
  elseif device:id() == tempSensor and valueType == 1 and scale == 0 then
    tempValue = value
    calculate()
  end
end