While the Raspberry Pi has very good support for an I2C bus, a lot of very cool chips – including the in system programmer for just about every ATtiny and ATmega microcontroller – use an SPI bus.

A Raspberry Pi Zero Shield that will connect a Zero or Zero W module to a 3.3V or 5V compatible Arduino board, is available from US-based Burgessworld Custom Electronics. The two boards are connected ...

Another key differentiating factor between the two platforms is connectivity. Not only does the Raspberry Pi sport more I/O pins than the Arduino, but it has a good range of communication ports, too.

We’ve gotten used to the GPIO-available functions of Raspberry Pi computers remaining largely the same over the years, which is why it might have flown a little bit under the radar: the Raspb… ...

There is no best out of the two. It all depends on what you want to do with the boards. The Arduino is a better choice for beginners because it is less advanced than the Raspberry Pi.