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Control of extractor fan based on divergence from average humidity of wet-rooms.
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| --[[ | |
| %% properties | |
| 231 value | |
| 225 value | |
| 244 value | |
| %% events | |
| %% globals | |
| --]] | |
| --[[ | |
| I'm basing the trigger values on divergence from the average to deal with fluctuations in general air | |
| humidity throughout the year. In winter the humidity will hover around 30% while in summer the humidity | |
| can stay up around 50%. A drawback of this is if humidity is created in all rooms at the same time it | |
| will not turn on the extractor. I'm considering moving the average to a global variable that is calculated | |
| on a 24 hour sliding window using a json document as a queue stored in a variable. That would probably | |
| create a more even and accurate average. | |
| 244 = Laundry | |
| 231 = Family Bathroom | |
| 225 = Master Bathroom | |
| 162 = Extraction fan | |
| --]] | |
| -- Set defaults | |
| local deviceModifier = { ["231"] = 0, ["225"] = 0, ["244"] = 0 }; | |
| local avgHumidity = 0; | |
| local divHumidity = 0; | |
| local sumHumidity = 0 | |
| local countHumidity = 0 | |
| local fanSpeed = tonumber(fibaro:getValue(162, "value")); | |
| local newFanSpeed = fanSpeed; | |
| -- Create round function missing in Lua | |
| local function round(val, decimal) | |
| if (decimal) then | |
| return math.floor( (val * 10^decimal) + 0.5) / (10^decimal) | |
| else | |
| return math.floor(val+0.5) | |
| end | |
| end | |
| -- Locate all humidity sensors | |
| local data = {type="com.fibaro.humiditySensor"} | |
| local devices = fibaro:getDevicesId(data); | |
| -- Calculate average humidity | |
| for idx, deviceID in ipairs(devices) do | |
| local roomID = fibaro:getRoomID(deviceID); | |
| if (roomID == 9 or roomID == 11 or roomID == 13) then | |
| local roomHumidity = tonumber(fibaro:getValue(deviceID, "value")) - deviceModifier[tostring(deviceID)]; | |
| sumHumidity = sumHumidity + tonumber(fibaro:getValue(deviceID, "value")) | |
| countHumidity = countHumidity + 1 | |
| end | |
| end | |
| avgHumidity = sumHumidity/countHumidity | |
| -- Find greates divergence from average | |
| for idx, deviceID in ipairs(devices) do | |
| local roomID = fibaro:getRoomID(deviceID); | |
| if (roomID == 9 or roomID == 11 or roomID == 13) then | |
| local roomHumidity = tonumber(fibaro:getValue(deviceID, "value")) - deviceModifier[tostring(deviceID)]; | |
| -- fibaro:debug("Device "..deviceID..", value "..roomHumidity..", divergence "..math.abs(roomHumidity - avgHumidity)) | |
| if divHumidity < math.abs(roomHumidity - avgHumidity) then | |
| divHumidity = math.abs(roomHumidity - avgHumidity); | |
| end | |
| end | |
| end | |
| -- Determine fan speed depending on amount of divergence. | |
| -- There are two "slack" areas on each side of middle speed to ensure we don't constantly trigger | |
| -- speed changes on the extractor | |
| if (divHumidity < 2.5 and fanSpeed ~= 0 ) then | |
| newFanSpeed = 0 | |
| elseif (divHumidity >= 2.5 and divHumidity < 4 and fanSpeed == 99) then | |
| newFanSpeed = 50 | |
| elseif (divHumidity >= 4 and divHumidity < 9 and fanSpeed ~= 50) then | |
| newFanSpeed = 50 | |
| elseif (divHumidity >= 9 and divHumidity < 11 and fanSpeed == 0) then | |
| newFanSpeed = 50 | |
| elseif (divHumidity >= 11 and fanSpeed ~= 99) then | |
| newFanSpeed = 99 | |
| end | |
| -- Set the fan speed | |
| if (newFanSpeed ~= fanSpeed) then | |
| fibaro:call(162, "setValue", newFanSpeed) | |
| end | |
| fibaro:debug("Avg humidity: "..round(avgHumidity,2)..", highest divergence: "..round(divHumidity,2)..". Old fan speed: "..fanSpeed..", new fan speed: "..newFanSpeed) |
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