One of the most important things you can do with an Internet of Things project is to send data online, so it can be stored, retrieved later, and plotted inside a nice dashboard. Of course, it needs to be accessible from any web browser or application in the world.
In this chapter, this is exactly what we are going to do with Arduino. We are going to use an Arduino board to log sensor data online, and then we'll see how to exploit this data. We are first going to get an overview of what options are available when you want to log data online from an Arduino project. Then, we are going to connect sensors to the Arduino board, and log this data online. Finally, we'll see how to access this data, plot it, and also visualize data coming from several boards at once.