毎朝、その日の天気に応じた色でHueが点灯するようにしてみた

var http = require('http')
var https = require('https')

exports.handler = (event, context, callback) => {
    callback(null, 'Start WeatherToday')
    var iftttEventName = 'color_received'
    var iftttSecretKey = 'YourSecretKeyForIFTTTMakeChannel'
    var openWeatherMapApiKey = "YourOpenWeatherMapApiKey"
    var openWeatherMapApiCityId = "1850147" // Tokyo
    
    fetchWeather((weatherId) =>{ 
        sendIfttt({
            value1: colorByWeatherId(weatherId)
        },
        (res) => {
            console.log('done')
            context.done()
        },
        (err) => {
            console.log("error: " + err)
            context.done()
        })
    },
    (err) => {
        console.log("error: " + err)
        context.done()
    })
    
    function colorByWeatherId(weatherId) {
        /**
         * Convert weather id to light color.
         * Refer: [Weather Conditions - OpenWeatherMap](http://openweathermap.org/weather-conditions)
         */
        switch (Math.floor(weatherId / 100)) {
        case 2: // Group 2xx: Thunderstorm
            return "#55bbff"
        case 3: // Group 3xx: Drizzle
            return "#8888aa"
        case 5: // Group 5xx: Rain
            return "#5555ff"
        case 6: // Group 6xx: Snow
            return "#666666"
        case 8:
            if (weatherId == 800)
                // Group 800: Clear
                return "#ffaa00"
            else
                // Group 80x: Clouds
                return "#886644"
        }
        return '#f0f0f0'
    }

    function fetchWeather(success, error) {
        /**
         * Featch weather information from OpenWeatherMap.
         * Refer: [5 day weather forecast - OpenWeatherMap](http://openweathermap.org/forecast5)
         */
        var uri = "http://api.openweathermap.org/data/2.5/forecast/daily?id=" + openWeatherMapApiCityId + "&cnt=1&APPID=" + openWeatherMapApiKey

        http.get(uri, (res) => {
            var body = ""
        
            res.on("data", (chunk) => {
                body += chunk
            });
        
            res.on("end", () => {
                console.log("openweathermap response: " + body)
                var res = JSON.parse(body)
                var weather = res["list"][0]["weather"][0]["id"] // Get weather id
                success(weather)
            })
            
        }).on("error", error)
    }
    
    function sendIfttt(data, success, error) {
        var hostname = 'maker.ifttt.com'
        var path = '/trigger/' + iftttEventName + '/with/key/' + iftttSecretKey

        var postData = JSON.stringify(data);
        var options = {
            hostname: hostname,
            path: path,
            method: 'POST',
            headers: {
                'Content-Type': 'application/json',
                'Content-Length': Buffer.byteLength(postData)
            }
        }
        var req = https.request(options, (res) => {
            var body = ""
        
            res.on("data", (chunk) => {
                body += chunk
            })
        
            res.on("end", () => {
                console.log("sent ifttt: " + body)
                success(body)
            })
        })
        req.on("error", error)
        req.write(postData)
        req.end()
    }
}