This is a line graph of the temperature in my apartment in Portland, OR. The data comes from a DS18S20 temperature sensor connected to an ESP8266 MCU, it acts as a stand alone sensor node. Every few minutes the "main" server pulls the data from the sensor node. It also pulls the current outdoor temperature from Forecast.IO, it then takes those two values and creates a JSON object and then sends the data up to an ElasticSearch server.
The graph is drawn with Highcharts. To get the data I'm using the ElasticSearch jQuery Client. I also use MomentJS to reformat the data that is returned from ElasticSearch so the timestamp is in the correct format for Highcharts.