From 4b851f7e9c7319502e76214ecd6a658470405dd9 Mon Sep 17 00:00:00 2001
From: Fede85 <f.vanzati@gmail.com>
Date: Fri, 21 Jun 2013 20:09:04 +0200
Subject: added the YahooWeather example
---
.../Bridge/examples/YahooWeather/YahooWeather.ino | 94 ++++++++++++++++++++++
1 file changed, 94 insertions(+)
create mode 100644 libraries/Bridge/examples/YahooWeather/YahooWeather.ino
(limited to 'libraries/Bridge')
diff --git a/libraries/Bridge/examples/YahooWeather/YahooWeather.ino b/libraries/Bridge/examples/YahooWeather/YahooWeather.ino
new file mode 100644
index 0000000..b751e1d
--- /dev/null
+++ b/libraries/Bridge/examples/YahooWeather/YahooWeather.ino
@@ -0,0 +1,94 @@
+/*
+ Yahoo Weather Forecast parser
+
+ http://developer.yahoo.com/weather/
+ This sketch demonstrate how to use the Linux command line tools
+ to parse a simple XML file on the Arduino Yún.
+
+ First thing download the XML file from the Yahoo Weather service
+ than use "grep" and "cut" to extract the data you want.
+
+ To find the location ID of your location, browse or search for your
+ city from the Weather home page. The location ID is in the URL for
+ the forecast page for that city.
+
+ created 21 Jun 2013
+ by Federico Vanzati
+
+ */
+
+#include <Bridge.h>
+
+String locationID = "725003"; // Turin, Italy
+
+// table with keywords to search in the XML file
+// the third column is the tag to the field
+String forecast[10][3] = {
+ "location", "2", "city",
+ "condition", "6", "temperature",
+ "condition", "2", "condition",
+ "astronomy", "2", "sunrise",
+ "astronomy", "4", "sunset",
+ "atmosphere", "2", "humidity",
+ "atmosphere", "6", "pressure",
+ "wind", "6", "wind speed",
+ "wind", "4", "wind direction",
+ "wind", "2", "chill temperature"
+};
+
+
+void setup() {
+ Bridge.begin();
+ Serial.begin(9600);
+ while(!Serial);
+
+ Serial.println("Weather Forecast for your location: \n");
+}
+
+void loop() {
+
+ for(int i=0; i<10; i++) {
+
+ // Compose the request
+
+ // curl is a program that connect to an URL an download the content
+ // is used to get the weather forecast from yahoo in XML format
+ String command = "curl -s "; // -s is the silent option
+ command += "http://weather.yahooapis.com/forecastrss"; // yahoo weather RSS service
+ command += "?w="; // query for the location
+ command += locationID;
+ //command += "\\&u=c"; // ask for celsius degrees
+
+ // add a new process
+ // grep is used to extract a single line of content containig a search keyword form the XML
+ command += " | "; // pipe a new process
+ command += "grep ";
+ command += forecast[i][0]; // word to search in the XML file
+
+ // add a new process
+ // cut is a program that split a text in different fields
+ // when encouter the passed character delimiter
+ command += " | "; // pipe a new process
+ command += "cut ";
+ command += "-d \\\" "; // -d parameter split the string every " char
+ command += "-f "; // -f parameter is to return the 6th splitted element
+ command += forecast[i][1]; // the field are already manually calculated and inserted in the forecast table
+
+
+ Serial.print(forecast[i][2]);
+ Serial.print("= ");
+
+ // run the command
+ Process wf;
+ wf.runShellCommand(command);
+
+ while(wf.available()>0)
+ {
+ Serial.print( (char)wf.read() );
+ }
+ }
+
+ //do nothing forevermore
+ while(1);
+}
+
--
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