Now connect the USB cable, the square side of the cable goes to the Arduino UNO while the rectangle side goes to the Raspberry Pi. To upload the code on Arduino UNO, click on Sketch > Upload or ...

Arduino, the world's leading open-source hardware and software platform, today announced the launch of its next-generation UNO board, a significant re ...

Here’s a tutorial if you get stuck. You’ll also need an Arduino-compatible microcontroller and an appropriate way to connect it to your computer (an A-to-B USB cable, micro USB, or FTDI breakout).

It's of course backwards compatible with existing Arduino add-ons, but sets itself apart with a new USB controller with lower latency and driver-free operation on Mac and Linux.

The Arduino UNO R4 boasts a 3x performance increase over the UNO R3 and , in addition, SRAM has been upgraded from 2kB to 32kB, and flash memory from 32kB to 256kB to support more complex projects.