ws.onmessage = function(dataReceived) {

var j = JSON.parse(dataReceived.data);
    if (j == null)
        return;
    if (chartData[j.Id] == null) {
        chartData[j.Id] = [];
    }

	if (localStorage["chartData"] !==null || localStorage["chartData"] !== "undefined") {

	json = JSON.parse(localStorage["chartData"]);

	chartData[j.Id] = json;

		}

    chartData[j.Id].push({x : Date.now(), y : j.Weight});

    //console.log(chartData[j.Id]);

	localStorage["chartData"] = JSON.stringify(chartData[j.Id]);

    console.log(chartData[j.Id]);

	document.getElementById('text1').value = j.Weight;

	document.getElementById('text2').value = j.Consumable;

    scatterChart.data.datasets[0].data = chartData[j.Id];

    scatterChart.update();

    }