4180 / Mbed 2 deprecated weathe_traffic

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Dependencies:   4DGL-uLCD-SE NetServices mbed spxml

Fork of weather by 4180

main.cpp@3:9e55847f25c4, 2016-04-27 (annotated)

Committer:
agamemaker
Date:
Wed Apr 27 20:40:34 2016 +0000
Revision:
3:9e55847f25c4
Parent:
2:b14f99568253
Child:
4:fd8c945b8d79
adsf

Who changed what in which revision?

UserRevisionLine numberNew contents of line
4180_1 0:4a917644acc4 1 #include "mbed.h"
4180_1 0:4a917644acc4 2 #include "EthernetNetIf.h"
4180_1 0:4a917644acc4 3 #include "HTTPClient.h"
4180_1 0:4a917644acc4 4 #include "spdomparser.hpp"
4180_1 0:4a917644acc4 5 #include "spxmlnode.hpp"
4180_1 0:4a917644acc4 6 #include "spxmlhandle.hpp"
ashea6 2:b14f99568253 7 //#include "NokiaLCD.h"
ashea6 2:b14f99568253 8 #include "uLCD_4DGL.h"
lballiet91 1:c96f140b5710 9 #include <string>
4180_1 0:4a917644acc4 10 // Internet of Things weather display example: LCD displays LA current weather via internet Google API
4180_1 0:4a917644acc4 11 // Adapted for LCD from http://mbed.org/users/hlipka/programs/spxmltest_weather/lif782
4180_1 0:4a917644acc4 12
ashea6 2:b14f99568253 13 //NokiaLCD lcd(p5, p7, p8, p9, NokiaLCD::LCD6610); // mosi, sclk, cs, rst, type
ashea6 2:b14f99568253 14 uLCD_4DGL lcd(p28,p27,p29);
4180_1 0:4a917644acc4 15 EthernetNetIf eth;
4180_1 0:4a917644acc4 16 HTTPClient http;
4180_1 0:4a917644acc4 17 HTTPResult result;
4180_1 0:4a917644acc4 18 bool completed = false;
4180_1 0:4a917644acc4 19 void request_callback(HTTPResult r) {
4180_1 0:4a917644acc4 20 result = r;
4180_1 0:4a917644acc4 21 completed = true;
4180_1 0:4a917644acc4 22 }
4180_1 0:4a917644acc4 23
lballiet91 1:c96f140b5710 24 void parseWeather(SP_XmlElementNode *node, string loc) {
4180_1 0:4a917644acc4 25 //extracts current weather XML data fields for LCD
4180_1 0:4a917644acc4 26 SP_XmlHandle handle(node);
lballiet91 1:c96f140b5710 27 SP_XmlElementNode * condition = handle.getChild( "item" ).getChild("yweather:condition").toElement();
4180_1 0:4a917644acc4 28 lcd.cls();
lballiet91 1:c96f140b5710 29 // Print the name of the city
4180_1 0:4a917644acc4 30 lcd.locate(0,2);
lballiet91 1:c96f140b5710 31 lcd.printf("%s:", loc);
lballiet91 1:c96f140b5710 32 //Print the weather conditions
lballiet91 1:c96f140b5710 33 lcd.locate(0,3);
lballiet91 1:c96f140b5710 34 lcd.printf("%s",condition->getAttrValue("text"));
lballiet91 1:c96f140b5710 35 //Print the termperature (in degrees Celcius)
lballiet91 1:c96f140b5710 36 lcd.locate(0,4);
agamemaker 3:9e55847f25c4 37 lcd.printf("%sF",condition->getAttrValue("temp"));
agamemaker 3:9e55847f25c4 38 /*//Print the date and time
lballiet91 1:c96f140b5710 39 lcd.locate(0,5);
lballiet91 1:c96f140b5710 40 lcd.printf("%s",condition->getAttrValue("date"));
agamemaker 3:9e55847f25c4 41 */
4180_1 0:4a917644acc4 42 }
4180_1 0:4a917644acc4 43
agamemaker 3:9e55847f25c4 44 int weather() {
4180_1 0:4a917644acc4 45 // the eth and HTTP code has be taken directly from the HTTPStream documentation page
4180_1 0:4a917644acc4 46 // see http://mbed.org/cookbook/HTTP-Client-Data-Containers
4180_1 0:4a917644acc4 47 lcd.cls();
lballiet91 1:c96f140b5710 48
4180_1 0:4a917644acc4 49 lcd.locate(0,2);
4180_1 0:4a917644acc4 50 lcd.printf("net setup");
4180_1 0:4a917644acc4 51 lcd.locate(0,3);
ashea6 2:b14f99568253 52 EthernetErr ethErr = eth.setup(60000);
4180_1 0:4a917644acc4 53 if (ethErr) {
4180_1 0:4a917644acc4 54 lcd.printf("Error in setup");
4180_1 0:4a917644acc4 55 return -1;
4180_1 0:4a917644acc4 56 }
4180_1 0:4a917644acc4 57 lcd.printf("net ok");
4180_1 0:4a917644acc4 58
4180_1 0:4a917644acc4 59 SP_XmlDomParser parser;
4180_1 0:4a917644acc4 60 HTTPStream stream;
4180_1 0:4a917644acc4 61
4180_1 0:4a917644acc4 62 char BigBuf[512 + 1] = {0};
4180_1 0:4a917644acc4 63 stream.readNext((byte*)BigBuf, 512); //Point to buffer for the first read
lballiet91 1:c96f140b5710 64 //Yahoo! weather API for selected city - get XML document for parsing
ashea6 2:b14f99568253 65 HTTPResult r = http.get("https://query.yahooapis.com/v1/public/yql?q=select%20item.condition%20from%20weather.forecast%20where%20woeid%20in%20%28select%20woeid%20from%20geo.places%281%29%20where%20text%3D%22atlanta%2C%20ga%22%29&amp", &stream, request_callback);
4180_1 0:4a917644acc4 66 while (!completed) {
4180_1 0:4a917644acc4 67 Net::poll(); //Polls the Networking stack
4180_1 0:4a917644acc4 68 if (stream.readable()) {
4180_1 0:4a917644acc4 69 BigBuf[stream.readLen()] = 0; //Transform this buffer in a zero-terminated char* string
4180_1 0:4a917644acc4 70 parser.append( BigBuf, strlen(BigBuf)); // stream current buffer data to the XML parser
4180_1 0:4a917644acc4 71 stream.readNext((byte*)BigBuf, 512); //Buffer has been read, now we can put more data in it
4180_1 0:4a917644acc4 72 }
4180_1 0:4a917644acc4 73 }
4180_1 0:4a917644acc4 74 lcd.cls();
4180_1 0:4a917644acc4 75 lcd.locate(0,2);
4180_1 0:4a917644acc4 76 if (result == HTTP_OK) {
4180_1 0:4a917644acc4 77 lcd.printf(" Read complete");
4180_1 0:4a917644acc4 78 } else {
4180_1 0:4a917644acc4 79 lcd. printf(" Error %d", result);
4180_1 0:4a917644acc4 80 return -1;
4180_1 0:4a917644acc4 81 }
4180_1 0:4a917644acc4 82
4180_1 0:4a917644acc4 83 SP_XmlHandle rootHandle( parser.getDocument()->getRootElement() );
agamemaker 3:9e55847f25c4 84 SP_XmlElementNode * child2 = rootHandle.getChild( "results" ).getChild( "channel" )
lballiet91 1:c96f140b5710 85 .toElement();
ashea6 2:b14f99568253 86
agamemaker 3:9e55847f25c4 87 //lcd.printf(BigBuf);
ashea6 2:b14f99568253 88
4180_1 0:4a917644acc4 89 if ( child2 ) {
agamemaker 3:9e55847f25c4 90 parseWeather(child2, "Atlanta"); //parses XML "current-conditions" info
4180_1 0:4a917644acc4 91 }
agamemaker 3:9e55847f25c4 92
4180_1 0:4a917644acc4 93 if ( NULL != parser.getError() ) {
4180_1 0:4a917644acc4 94 lcd.printf( "\n error: %s\n", parser.getError() );
4180_1 0:4a917644acc4 95 }
agamemaker 3:9e55847f25c4 96 }