Domoticz

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return {
    on = {
        timer = { 'every 15 minutes' },
        httpResponses = { 'rain_forecast_callback' }
    },
    logging = {
        level = domoticz.LOG_ERROR,
        marker = "Rain Forecast"
    },
    execute = function(domoticz, item)
        -- Rain intensity classification with cascading conditionals
        local function getRainIntensity(code)
            code = tonumber(code)
            if code > 110 then return "Zware regen"
            elseif code >= 88 then return "Matige regen"
            elseif code >= 77 then return "Lichte regen"
            elseif code >= 51 then return "Regenachtig"
            elseif code >= 20 then return "Motregen"
            elseif code == 0 then return "Geen neerslag"
            else return "Onbekend" end
        end

        -- Process timer trigger
        if item.isTimer then
            local location = domoticz.settings.location
            if not location or not location.latitude or not location.longitude then
                domoticz.log('Location data not configured', domoticz.LOG_ERROR)
                return
            end
            
            domoticz.openURL({
                url = string.format(
                    "https://gpsgadget.buienradar.nl/data/raintext/?lat=%.6f&lon=%.6f",
                    location.latitude,
                    location.longitude
                ),
                method = 'GET',
                callback = 'rain_forecast_callback'
            })
        
        -- Process HTTP response
        elseif item.isHTTPResponse then
            if not item.ok then
                domoticz.log(string.format(
                    "Failed to fetch rain data (HTTP %d)", 
                    item.statusCode
                ), domoticz.LOG_ERROR)
                return
            end

            local forecast = {}
            local lineCount = 0
            
            for line in item.data:gmatch("[^\r\n]+") do
                local intensity, time = line:match("(%d+)|(%d+:%d+)")
                if time and tonumber(time:match("%d+$")) % 15 == 0 then
                    table.insert(forecast, string.format(
                        "%s | %3s | %-12s",
                        time,
                        intensity,
                        getRainIntensity(intensity)
                    ))
                    lineCount = lineCount + 1
                    if lineCount >= 4 then break end
                end
            end

            local rainSensor = domoticz.devices('Regen')
            if rainSensor then
                rainSensor.updateText(table.concat(forecast, "\n"))
                domoticz.log(string.format(
                    "Updated rain forecast with %d intervals", 
                    lineCount
                ), domoticz.LOG_INFO)
            else
                domoticz.log("Rain sensor device not found", domoticz.LOG_ERROR)
            end
        end
    end
}

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<IFRAME SRC="https://www.weeronline.nl/widget/radar?id=123456789&circle=true" height="800" width="100%"></IFRAME>