Arduino Internals

Point-to-Point Networking

The Arduino has several communication interfaces already built in, and it’s trivially easy and relatively inexpensive to add communication capabilities these days. First you look at the built-in options, and then you reach out a bit and hook up some more linkages to the outside world.

Talking Over the Serial Port

You’ve already worked extensively with the Arduino’s built-in serial port. You’ve given it ho-hum tasks like uploading sketches and mindlessly reciting “Hello, world!” Wouldn’t it be nice if you could transcend the mundane shuffle of bits back and forth and have a meaningful conversation?

The Arduino’s serial port is often hard-wired to the USB interface, making it difficult to apply it to other tasks. On the ...