smd.iotkit2.ch / Mbed 2 deprecated YahooWeather

Beispiel Abfrage Yahoo Weather fuer Zuerich

Dependencies:   EthernetInterface mbed-rtos mbed spxml

Fork of HTTP_GET by smd.iotkit2.ch

Mittels Yahoo Weather kann das aktuelle Wetter und eine Vorhersage für einen Bestimmten Ort abgefragt werden.

Links

Beispiel Abfrage Wetter in Zürich

Aufruf mittels curl:

    curl http://query.yahooapis.com/v1/public/yql  \
           -d q="select * from weather.forecast where woeid=784794"    -d format=xml

Antwort als XML von Yahoo:

<?xml version="1.0" encoding="UTF-8"?>
<query xmlns:yahoo="http://www.yahooapis.com/v1/base.rng" yahoo:count="1" yahoo:created="2016-07-22T13:17:05Z"
	yahoo:lang="en-US">
	<results>
		<channel>
			<yweather:units xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" distance="mi" pressure="in"
				speed="mph" temperature="F" />
			<title>Yahoo! Weather - Zurich, ZH, CH</title>
			<link>http://us.rd.yahoo.com/dailynews/rss/weather/Country__Country/*https://weather.yahoo.com/country/state/city-784794/</link>
			<description>Yahoo! Weather for Zurich, ZH, CH</description>
			<language>en-us</language>
			<lastBuildDate>Fri, 22 Jul 2016 03:17 PM CEST</lastBuildDate>
			<ttl>60</ttl>
			<yweather:location xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" city="Zurich"
				country="Switzerland" region=" ZH" />
			<yweather:wind xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" chill="72" direction="150"
				speed="11" />
			<yweather:atmosphere xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" humidity="72"
				pressure="957.0" rising="0" visibility="16.1" />
			<yweather:astronomy xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" sunrise="5:54 am"
				sunset="9:10 pm" />
			<image>
				<title>Yahoo! Weather</title>
				<width>142</width>
				<height>18</height>
				<link>http://weather.yahoo.com</link>
				<url>http://l.yimg.com/a/i/brand/purplelogo//uh/us/news-wea.gif</url>
			</image>
			<item>
				<title>Conditions for Zurich, ZH, CH at 02:00 PM CEST</title>
				<geo:lat xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#">47.38427</geo:lat>
				<geo:long xmlns:geo="http://www.w3.org/2003/01/geo/wgs84_pos#">8.52959</geo:long>
				<link>http://us.rd.yahoo.com/dailynews/rss/weather/Country__Country/*https://weather.yahoo.com/country/state/city-784794/</link>
				<pubDate>Fri, 22 Jul 2016 02:00 PM CEST</pubDate>
				<yweather:condition xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="39"
					date="Fri, 22 Jul 2016 02:00 PM CEST" temp="72" text="Scattered Showers" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="4" date="22 Jul 2016"
					day="Fri" high="77" low="66" text="Thunderstorms" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="47" date="23 Jul 2016"
					day="Sat" high="76" low="64" text="Scattered Thunderstorms" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="39" date="24 Jul 2016"
					day="Sun" high="78" low="63" text="Scattered Showers" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="47" date="25 Jul 2016"
					day="Mon" high="77" low="64" text="Scattered Thunderstorms" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="47" date="26 Jul 2016"
					day="Tue" high="75" low="64" text="Scattered Thunderstorms" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="4" date="27 Jul 2016"
					day="Wed" high="75" low="61" text="Thunderstorms" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="30" date="28 Jul 2016"
					day="Thu" high="76" low="60" text="Partly Cloudy" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="30" date="29 Jul 2016"
					day="Fri" high="79" low="59" text="Partly Cloudy" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="39" date="30 Jul 2016"
					day="Sat" high="80" low="58" text="Scattered Showers" />
				<yweather:forecast xmlns:yweather="http://xml.weather.yahoo.com/ns/rss/1.0" code="30" date="31 Jul 2016"
					day="Sun" high="78" low="59" text="Partly Cloudy" />
				<description></description>
				<guid isPermaLink="false" />
			</item>
		</channel>
	</results>
</query>

main.cpp

Committer:
marcel1691
Date:
2016-07-22
Revision:
7:99e6c4f0a3ff
Parent:
6:e1c6b8b3c527

File content as of revision 7:99e6c4f0a3ff:

/** Beispiel Abfrage Yahoo Weather fuer Zuerich
 */
#include "mbed.h"
#include "HTTPClient.h"
#include "HTTPText.h"
#include "EthernetInterface.h"
#include "spdomparser.hpp"
#include "spxmlnode.hpp"
#include "spxmlhandle.hpp"

EthernetInterface eth;
// HTTPClient Hilfsklasse
HTTPClient http;
// I/O Buffer
char message[6000];

DigitalOut myled(LED1);

int main()
{
    printf("\tYahoo Weather\n");
    eth.init();
    eth.connect();

    // Yahoo Weather fuer Zuerich
    while(1) 
    {
        myled = 1;
        HTTPText inText( message, sizeof(message) );
        // MAP (Argument=Wert) 
        HTTPMap map;
        map.put( "q", "select * from weather.forecast where woeid=784794" );
        map.put( "format", "xml" );
        int ret = http.post( "https://query.yahooapis.com/v1/public/yql", map, &inText );
        if ( !ret ) 
        {
            // XML Parser
            SP_XmlDomParser parser;
            // char[] bzw. XML parsen
            parser.append( message, strlen( message ) );
            SP_XmlHandle rootHandle( parser.getDocument()->getRootElement() );
            SP_XmlElementNode * results = rootHandle.getChild( "results" ).toElement();
            SP_XmlHandle hresults( results );              
            SP_XmlElementNode * node = hresults.getChild( "channel" ).toElement();
            SP_XmlHandle handle(node);
            SP_XmlElementNode * condition = handle.getChild( "item" ).getChild("yweather:condition").toElement();
            
            // Allgemeine Lage, Sonnig, Bewoelkt etc.
            printf( "%s, ", condition->getAttrValue("text") );
            // Temperatur in Celsius
            printf( "%4.2fC, ", (atof( condition->getAttrValue("temp") ) - 32.0) * 0.555555f  );
            // Datum und Zeit letzte Aktualisierung
            printf( "%s\n", condition->getAttrValue("date") );
            
            // Forecast fuer die naechsten Drei Tage
            for ( int day = 1; day < 4; day++ )
            {
                SP_XmlElementNode * forecast = handle.getChild( "item" ).getChild("yweather:forecast", day ).toElement(); 
                if  ( forecast )
                {
                    // Allgemeine Lage, Sonnig, Bewoelkt etc.
                    printf( "%s: %s, ", forecast->getAttrValue("date"), forecast->getAttrValue("text") );
                    // Temperatur in Celsius
                    printf( "low %4.2fC, ", (atof( forecast->getAttrValue("low") ) - 32.0) * 0.555555f  );
                    printf( "high %4.2fC\n", (atof( forecast->getAttrValue("high") ) - 32.0) * 0.555555f  );
                }
                else
                    printf( "missing forcast\n" );
            }
        } 
        else
            printf("Error - ret = %d - HTTP return code = %d\n", ret, http.getHTTPResponseCode());

        myled = 0;

        wait(10);
    }
    //eth.disconnect();
}