Example of loading data dynamically with AJAX. Percentage change in GDP (source: Eurostat). Click the buttons below.
The data is fetched over HTTP, in this case directly from text files. Usually the URL would point to some web server handler (e.g. a PHP page or Java/.NET/Python/Ruby on Rails handler) that extracts it from a database and serializes it to JSON.
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If you combine AJAX with setTimeout, you can poll the server for new data.
**************************************************************************************************************************************** Webpage.h Webseite im Flash (Basis U.Radig / Wil Wallucks) ________________________________________________________________________________________________________________________________________ char name_Page2[] PROGMEM = "ow_data.htm"; PROGMEM char Page2[] = { "{" " \"label\": \"Europe (EU27)\"," " \"data\": [[1999, 3.0], [2000, 3.9], [2001, 2.0], [2002, 1.2], [2003, 1.3], [2004, 2.5], [2005, 2.0], [2006, 3.1], [2007, 2.9], [2008, 0.9]]" "}" "%END"}; #endif //Nur Dateiname und Pointer eintragen WEBPAGE_ITEM WEBPAGE_TABLE[] PROGMEM = // Befehls-Tabelle { {name_Page1,Page1}, #if USE_JSON {name_Page2,Page2}, #endif {name_Page4,Page4}, {name_bild_rakete,bild_rakete}, {name_bild_balken,bild_balken}, {name_led_on,led_on}, {name_led_off,led_off}, {NULL,NULL} }; ________________________________________________________________________________________________________________________________________