Intelligent devices are becoming an ever more important and ubiquitous part of our everyday lives. Mobile phones represented the first wave of smaller personal computers. And now, as the price of electronics and processing power continues to fall, there is an intersection between sensors and other electromechanical devices and computers that live on the edge of the Internet: close to the source of the data, processing the data locally and sending just what is required to other computers to consume. This wave of machine-to-machine (M2M) technology, or more broadly, the Internet of Things (IoT), is rapidly shaping the future of computing. Oracle Java Platform, Micro Edition (Java ME) provides Java developers with a direct path to this new market space by using their existing knowledge and skills.
In this tutorial, you prepare a Raspberry Pi to run Java ME Embedded 8, the most current version of Java ME Embedded. The Raspberry Pi is a computer that is about the size of a deck of cards, yet it is capable of running a Linux distribution on its ARM 11 processor. The Raspberry Pi also supports USB, Ethernet, audio, HDMI, and RCA video output. But most importantly, the Raspberry Pi provides a 26-pin header that connects the computer to the outside world, through general-purpose input/output (GPIO) pins that can drive LEDs, read switches and other electronic signals, and connect to a wealth of inter-integrated circuit (I2C) devices, universal asynchronous receiver/transmitter (UART) devices, and more. This header and the Raspberry Pi's low cost is what makes the Raspberry Pi an ideal platform to develop real-world embedded applications with Java ME Embedded.