In this second chapter of the book, we built our first application based on the Arduino Ethernet shield and Ethernet client class. We did some basic measurements on the Arduino board, sent these measurements on a local web server, and finally displayed this data in real time on a graph.
To proceed further with this chapter, I invite you to carefully repeat all the steps of this chapter to really understand well how the Arduino Ethernet shield communicates with the PHP code running on your computer. You can also add more sensors to the projects and log this data inside the database. Also, you can try to plot several variables at once on different graphs.
These were the major takeaways from this chapter:
First, we interfaced a digital temperature and humidity sensor to the Arduino board so that we can send the measurements to a local web server using the Ethernet shield. We also installed some useful software components such as a library to plot data in a web page.
Then, we built an Arduino...