The workbenches of hobbyists, hackers, and makers have become overrun with , computers-on-a-chip that power homebrewed video games, robots, toys, and more. In , Tom Igoe, one of the creators of Arduino, shows how to make these gadgets talk. Whether you need to connect some sensors to the Internet or create a device that can interact wirelessly with other creations, this book shows you what you need. Although they are powerful, the projects in this book are inexpensive to build: the Arduino microcontroller board itself ranges from around $25 to $40. The networking hardware covered here includes Ethernet, Wi-Fi, Bluetooth, and can be had for $25 to $50. Fully updated for the latest Arduino hardware and software, this book lets you combine microcontrollers, sensors, and networking hardware to make things... and make them talk to each other!