Problem with Weather forecast

[frank61BS]

@roramirez
Hello Ramirez, I had the same problem. But with your patch I can see the weatherforeast now
Thanks Frank

[Azrael]

Hello, I have exactly the same problem and I am trying to use your patch Ramirez. However, I am coming from the “mechanical world” and I’m new to Linux and GitHub. Could any of you write me how to apply such a patch?

[Mykle1]

@Azrael said in Problem with Weather forecast:

Could any of you write me how to apply such a patch?

You have to edit your weatherforecast.js file. Go to the link for the fix. The line you see highlighted in RED has to be removed (or commented out) of your weatherforecast.js file. The lines you see highlighted in GREEN have to be added in your weatherforecast.js file. The line numbers on the left make it easy for you to find exactly where the edits belong.

[Azrael]

Thank you Mykle1. Now the weather forecast shows up where it should be.
However, I have exactly the same problem what luizcarlosnery mentioned earlier. Today (Saturday) I see: Sat,Sat,Sat,Sat,Sat,Sun,Sun.

[Mykle1]

@Azrael

Sorry to hear that. Until the issues are resolved, you could always try another weather module. There are many to choose from.

Scroll down to the weather category

https://github.com/MichMich/MagicMirror/wiki/MagicMirror²-Modules#3rd-party-modules

[Duske]

You see the same day multiple times because this API is a “5 days/3 hour forecast API”, so you won’t get one result per day, but multiple forecasts for one single day with 3 hours between them.

E.g.

Result 1: "2017-09-24 00:00:00" Sunday
Result 2: "2017-09-24 03:00:00" Sunday
Result 3: "2017-09-24 06:00:00" Sunday

and so on

[Azrael]

OK, it makes sense.
Is there any option to get only one forecast for one day? Or to display somehow the time periods?

[Henrik]

I made a quick’n’dirty hack to make it only display the weather at noon each day. Around line 340, I added a simple if statement. I’m in UTC+2, so I had to put 14 instead of 12 in the comparison.

this.parserDataWeather(forecast); // hack issue #1017

if ( moment(forecast.dt, "X").format("HH") != "14")
  continue; //new if statement

this.forecast.push({

The limit of 16 no longer means 16 days, but 16 forecasts. Therefore, we need to change the enforced limit, around line 300, I set it to something higher (I chose 57):

params += "&cnt=" + (((this.config.maxNumberOfDays < 1) || (this.config.maxNumberOfDays > 16)) ? 57

Don’t forget to change the value in the actual config to the same number (57 in my case).
I chose 57 to get a full week, but it seems the API won’t return more than 5 days’ worth of data anyway.

[Mykle1]

@Henrik said in Problem with Weather forecast:

but it seems the API won’t return more than 5 days’ worth of data anyway.

The newest weather module to hit the MM scene. Take a look. I like it, I like it a lot!

https://github.com/cowboysdude/MMM-NOAA

[Sp4M]

Hi,

I made the module compatible for the “daily” api of openweather. It basically aggregate data of all “3h parts” of each day.
The min/max are global min/max of each parts
The icon shows the worst-case (you can reorder what is worse for you in config.iconTableOrdered)

Hope that will help devs

Here is the corresponding code of weatherforecast.js

/* global Module */

/* Magic Mirror
 * Module: WeatherForecast
 *
 * By Michael Teeuw http://michaelteeuw.nl
 * MIT Licensed.
 */

Module.register("weatherforecast",{

	// Default module config.
	defaults: {
		location: false,
		locationID: false,
		appid: "",
		units: config.units,
		maxNumberOfDays: 7,
		showRainAmount: false,
		updateInterval: 10 * 60 * 1000, // every 10 minutes
		animationSpeed: 1000,
		timeFormat: config.timeFormat,
		lang: config.language,
		fade: true,
		fadePoint: 0.25, // Start on 1/4th of the list.
		colored: false,

		initialLoadDelay: 2500, // 2.5 seconds delay. This delay is used to keep the OpenWeather API happy.
		retryDelay: 2500,

		apiVersion: "2.5",
		apiBase: "http://api.openweathermap.org/data/",
		forecastEndpoint: "forecast", //forecast/daily

		appendLocationNameToHeader: true,
		calendarClass: "calendar",

		roundTemp: false,

		iconTable: {
			"01d": "wi-day-sunny",
			"02d": "wi-day-cloudy",
			"03d": "wi-cloudy",
			"04d": "wi-cloudy-windy",
			"09d": "wi-showers",
			"10d": "wi-rain",
			"11d": "wi-thunderstorm",
			"13d": "wi-snow",
			"50d": "wi-fog",
			"01n": "wi-night-clear",
			"02n": "wi-night-cloudy",
			"03n": "wi-night-cloudy",
			"04n": "wi-night-cloudy",
			"09n": "wi-night-showers",
			"10n": "wi-night-rain",
			"11n": "wi-night-thunderstorm",
			"13n": "wi-night-snow",
			"50n": "wi-night-alt-cloudy-windy"
		},

		iconTableOrdered: [
			"11d",
			"09d",
			"13d",
			"10d",
			"50d",
			"04d",
			"03d",
			"02d",
			"01d",
			"11n",
			"09n",
			"13n",
			"10n",
			"50n",
			"02n",
			"03n",
			"04n",
			"01n"
		],
	},

	// create a variable for the first upcoming calendaar event. Used if no location is specified.
	firstEvent: false,

	// create a variable to hold the location name based on the API result.
	fetchedLocationName: "",

	// Define required scripts.
	getScripts: function() {
		return ["moment.js"];
	},

	// Define required scripts.
	getStyles: function() {
		return ["weather-icons.css", "weatherforecast.css"];
	},

	// Define required translations.
	getTranslations: function() {
		// The translations for the default modules are defined in the core translation files.
		// Therefor we can just return false. Otherwise we should have returned a dictionary.
		// If you're trying to build yiur own module including translations, check out the documentation.
		return false;
	},

	// Define start sequence.
	start: function() {
		Log.info("Starting module: " + this.name);

		// Set locale.
		moment.locale(config.language);

		this.forecast = [];
		this.loaded = false;
		this.scheduleUpdate(this.config.initialLoadDelay);

		this.updateTimer = null;

	},

	// Override dom generator.
	getDom: function() {
		var wrapper = document.createElement("div");

		if (this.config.appid === "") {
			wrapper.innerHTML = "Please set the correct openweather <i>appid</i> in the config for module: " + this.name + ".";
			wrapper.className = "dimmed light small";
			return wrapper;
		}

		if (!this.loaded) {
			wrapper.innerHTML = this.translate("LOADING");
			wrapper.className = "dimmed light small";
			return wrapper;
		}

		var table = document.createElement("table");
		table.className = "small";

		for (var f in this.forecast) {
			var forecast = this.forecast[f];

			var row = document.createElement("tr");
			if (this.config.colored) {
				row.className = "colored";
			}
			table.appendChild(row);

			var dayCell = document.createElement("td");
			dayCell.className = "day";
			dayCell.innerHTML = forecast.day;
			row.appendChild(dayCell);

			var iconCell = document.createElement("td");
			iconCell.className = "bright weather-icon";
			row.appendChild(iconCell);

			var icon = document.createElement("span");
			icon.className = "wi weathericon " + forecast.icon;
			iconCell.appendChild(icon);

			var maxTempCell = document.createElement("td");
			maxTempCell.innerHTML = forecast.maxTemp;
			maxTempCell.className = "align-right bright max-temp";
			row.appendChild(maxTempCell);

			var minTempCell = document.createElement("td");
			minTempCell.innerHTML = forecast.minTemp;
			minTempCell.className = "align-right min-temp";
			row.appendChild(minTempCell);

			if (this.config.showRainAmount) {
				var rainCell = document.createElement("td");
				if (isNaN(forecast.rain)) {
					rainCell.innerHTML = "";
				} else {
					if(config.units !== "imperial") {
						rainCell.innerHTML = forecast.rain + " mm";
					} else {
						rainCell.innerHTML = (parseFloat(forecast.rain) / 25.4).toFixed(2) + " in";
					}
				}
				rainCell.className = "align-right bright rain";
				row.appendChild(rainCell);
			}

			if (this.config.fade && this.config.fadePoint < 1) {
				if (this.config.fadePoint < 0) {
					this.config.fadePoint = 0;
				}
				var startingPoint = this.forecast.length * this.config.fadePoint;
				var steps = this.forecast.length - startingPoint;
				if (f >= startingPoint) {
					var currentStep = f - startingPoint;
					row.style.opacity = 1 - (1 / steps * currentStep);
				}
			}
		}

		return table;
	},

	// Override getHeader method.
	getHeader: function() {
		if (this.config.appendLocationNameToHeader) {
			return this.data.header + " " + this.fetchedLocationName;
		}

		return this.data.header;
	},

	// Override notification handler.
	notificationReceived: function(notification, payload, sender) {
		if (notification === "DOM_OBJECTS_CREATED") {
			if (this.config.appendLocationNameToHeader) {
				this.hide(0, {lockString: this.identifier});
			}
		}
		if (notification === "CALENDAR_EVENTS") {
			var senderClasses = sender.data.classes.toLowerCase().split(" ");
			if (senderClasses.indexOf(this.config.calendarClass.toLowerCase()) !== -1) {
				this.firstEvent = false;

				for (var e in payload) {
					var event = payload[e];
					if (event.location || event.geo) {
						this.firstEvent = event;
						//Log.log("First upcoming event with location: ", event);
						break;
					}
				}
			}
		}
	},

	/* updateWeather(compliments)
	 * Requests new data from openweather.org.
	 * Calls processWeather on succesfull response.
	 */
	updateWeather: function() {
		if (this.config.appid === "") {
			Log.error("WeatherForecast: APPID not set!");
			return;
		}

		var url = this.config.apiBase + this.config.apiVersion + "/" + this.config.forecastEndpoint + this.getParams();
		var self = this;
		var retry = true;

		var weatherRequest = new XMLHttpRequest();
		weatherRequest.open("GET", url, true);
		weatherRequest.onreadystatechange = function() {
			if (this.readyState === 4) {
				if (this.status === 200) {
					self.processWeather(JSON.parse(this.response));
				} else if (this.status === 401) {
					self.updateDom(self.config.animationSpeed);

					Log.error(self.name + ": Incorrect APPID.");
					retry = true;
				} else {
					Log.error(self.name + ": Could not load weather.");
				}

				if (retry) {
					self.scheduleUpdate((self.loaded) ? -1 : self.config.retryDelay);
				}
			}
		};
		weatherRequest.send();
	},

	/* getParams(compliments)
	 * Generates an url with api parameters based on the config.
	 *
	 * return String - URL params.
	 */
	getParams: function() {
		var params = "?";
		if(this.config.locationID) {
			params += "id=" + this.config.locationID;
		} else if(this.config.location) {
			params += "q=" + this.config.location;
		} else if (this.firstEvent && this.firstEvent.geo) {
			params += "lat=" + this.firstEvent.geo.lat + "&lon=" + this.firstEvent.geo.lon
		} else if (this.firstEvent && this.firstEvent.location) {
			params += "q=" + this.firstEvent.location;
		} else {
			this.hide(this.config.animationSpeed, {lockString:this.identifier});
			return;
		}

		params += "&units=" + this.config.units;
		params += "&lang=" + this.config.lang;
		/*
		 * Submit a specific number of days to forecast, between 1 to 16 days.
		 * The OpenWeatherMap API properly handles values outside of the 1 - 16 range and returns 7 days by default.
		 * This is simply being pedantic and doing it ourselves.
		 */
		params += "&cnt=" + (((this.config.maxNumberOfDays < 1) || (this.config.maxNumberOfDays > 121)) ? 40 : this.config.maxNumberOfDays);
		params += "&APPID=" + this.config.appid;

		return params;
	},

	/* processWeather(data)
	 * Uses the received data to set the various values.
	 *
	 * argument data object - Weather information received form openweather.org.
	 */
	processWeather: function(data) {
		this.fetchedLocationName = data.city.name + ", " + data.city.country;

		var days_forecast = [];

		for (var i = 0, count = data.list.length; i < count; i++) {
			let forecast = data.list[i];
			let day = forecast.dt_txt.split(" ")[0];

			if (!(day in days_forecast)) 
				days_forecast[day] = {"dt":[], "icon":[], "temp":[]};

			days_forecast[day].dt.push(forecast.dt);
			days_forecast[day].icon.push(forecast.weather[0].icon);
			days_forecast[day].temp.push(forecast.main.temp_min);
			days_forecast[day].temp.push(forecast.main.temp_max);
		}

		for (let i in days_forecast) {
			let min = days_forecast[i].temp.reduce((previous, current) => current = previous < current ? previous : current);
			let max = days_forecast[i].temp.reduce((previous, current) => current = previous > current ? previous : current);
			let icon = days_forecast[i].icon.reduce((previous, current) => current = this.config.iconTableOrdered.indexOf(previous) < this.config.iconTableOrdered.indexOf(current) ? previous : current);

			this.forecast.push({
				day: moment(days_forecast[i].dt[0], "X").format("ddd"),
				icon: this.config.iconTable[icon],
				maxTemp: this.roundValue(min),
				minTemp: this.roundValue(max)
//				rain: this.roundValue(forecast.rain)
			});
		}

		//Log.log(this.forecast);
		this.show(this.config.animationSpeed, {lockString:this.identifier});
		this.loaded = true;
		this.updateDom(this.config.animationSpeed);
	},

	/* scheduleUpdate()
	 * Schedule next update.
	 *
	 * argument delay number - Milliseconds before next update. If empty, this.config.updateInterval is used.
	 */
	scheduleUpdate: function(delay) {
		var nextLoad = this.config.updateInterval;
		if (typeof delay !== "undefined" && delay >= 0) {
			nextLoad = delay;
		}

		var self = this;
		clearTimeout(this.updateTimer);
		this.updateTimer = setTimeout(function() {
			self.updateWeather();
		}, nextLoad);
	},

	/* ms2Beaufort(ms)
	 * Converts m2 to beaufort (windspeed).
	 *
	 * see:
	 *  http://www.spc.noaa.gov/faq/tornado/beaufort.html
	 *  https://en.wikipedia.org/wiki/Beaufort_scale#Modern_scale
	 *
	 * argument ms number - Windspeed in m/s.
	 *
	 * return number - Windspeed in beaufort.
	 */
	ms2Beaufort: function(ms) {
		var kmh = ms * 60 * 60 / 1000;
		var speeds = [1, 5, 11, 19, 28, 38, 49, 61, 74, 88, 102, 117, 1000];
		for (var beaufort in speeds) {
			var speed = speeds[beaufort];
			if (speed > kmh) {
				return beaufort;
			}
		}
		return 12;
	},

	/* function(temperature)
	 * Rounds a temperature to 1 decimal or integer (depending on config.roundTemp).
	 *
	 * argument temperature number - Temperature.
	 *
	 * return number - Rounded Temperature.
	 */
	roundValue: function(temperature) {
		var decimals = this.config.roundTemp ? 0 : 1;
		return parseFloat(temperature).toFixed(decimals);
	}
});