commandArray = {}

iIDX = 83

if ( uservariables["WaterMeter"] > 0 ) then
    print("Water usage is set to " .. uservariables["WaterMeter"] / 1000 .. "m3 by user")
    commandArray['UpdateDevice'] = ''..iIDX..'|0|'..uservariables["WaterMeter"]..''
    commandArray['Variable:WaterVerbruik'] = tostring(uservariables["WaterMeter"])
    commandArray['Variable:WaterMeter'] = tostring(0)
end

if ( uservariables["WaterMeter"] == -1 ) then
    commandArray['UpdateDevice'] = ''..iIDX..'|0|0'
    commandArray['Variable:WaterMeter'] = tostring(0)
    return commandArray
end


sWaterUsage = uservariables["WaterVerbruik"]

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

if (devicechanged['GPIO Watermeter'] == 'Off') then
    sWaterUsageTot = (sWaterUsage + 1)
    print("Waterverbruik is gewijzigd naar " .. sWaterUsageTot / 1000 .. "m3 ")
    commandArray['UpdateDevice'] = ''..iIDX..'|0|'..sWaterUsageTot..''
    commandArray['Variable:WaterVerbruik'] = tostring(sWaterUsageTot)
else

    if otherdevices_lastupdate["Waterverbruik"] == nil then
        commandArray['UpdateDevice'] = ''..iIDX..'|0|'..sWaterUsage..''
    elseif (timedifference(otherdevices_lastupdate["Waterverbruik"]) > 300) then
        print("Laatste waterverbruik is meer dan 5 minuten geleden")
        print("Waterverbruik is nog steeds " .. sWaterUsage / 1000 .. "m3