google.charts.load('current', {	'packages':['gauge']});
google.charts.setOnLoadCallback(drawChart);


function drawChart()	{
	var jsonData = $.ajax({
		url: "wind_speed1.php",
		dataType: "json",
		async: false
	}).responseText;



	//Create our data table out of JSON data loaded from server.
	var data = new google.visualization.DataTable(jsonData);

	var options = {
		width: 600,
		height: 250,
		minorTicks: 5


	};

	var chart = new google.visualization.Gauge(document.getElementById('chart_div'));

        chart.draw(data, options);
};

$(function() {
    setInterval(drawChart, 13000);
});