The project has built a small IoT demo to illustrate the various components:
RuuviTag is also a small battery-powered IoT device, a bluetooth beacon, which includes a variety of sensors (temperature, atmospheric pressure, humidity). The project has implemented a demonstration of the temperature of coffee maker, where the RuuviTag is connected to the 4th floor coffee machine.
RuuviTag transmits temperature data wirelessly to a nearby gateway that runs a Java based software storing temperatures in a time-based InfluxDB database. For the demo, a user interface was also implemented using the tool called Grafana. The change in coffee temperatures yields a derivative, ie a slope, from which angle it can be deduced that the coffee is just about to be completed, whether the coffee maker is off a moment or something else. Demo illustrares what can be done with small IoT devices and, for example, card computers.