var Temp = [11,13,14,17,15,19,14,14,17,15,19,16,14];
$('.basementTempSparkline').sparkline(Temp, {
type: 'line',
 width: '160',
height: '40'
});

var Temp =[];
Temp.push(parseInt(payload));
if (Temp.length >= 20) {
Temp.shift()
}
$('.basementTempSparkline').sparkline(Temp, {
type: 'line',
 width: '160',
height: '40'
});