In Chapter 2 you learned how to create a web server with Node.js and use it to send data to a web page. In this chapter you will start sending data from an Arduino to a Node.js server and use the data on a web page.
The data will be coming from a switch button connected to an Arduino and into your computer via a serial port. You can import this data into a Node.js server and use it on a web page. By the end of this chapter, you will have a web page with a colored square on it, and the square will change color each time you press the Arduino button. Figure 3-1 is an example of what you ...
