We thought that connecting an Arduino to a Raspberry Pi was overkill ... [Jan] uses the PHP serial class to communicate between the RPi and Arduino (dead link; Internet Archive).

and even serve as a serial monitor where you can print messages. If you're more interested in programming with C/C++, there's an 88-page guide you can refer to. The Arduino Nano and Raspberry Pi ...

One of the key differences between Arduino and Raspberry Pi is the programming language ... One wire (called serial data or SDA) is responsible for transferring data, while the other wire (serial ...

A Raspberry Pi with a camera is nothing new ... You can connect via USB, serial, SPI, or I2C. Internally, the camera processes at 60 frames per second and it can remember seven signatures internally.