[Tech2077] is one of the lucky ones who already got his hands on a Raspberry Pi. He’s been looking into ... If you’ve been working with Arduino, your add-ons are probably meant for a 5V ...

the Raspberry Pi 4 has six SPI controllers, six I2C controllers, and six UARTs – all on its 40-pin header. You can’t make use of all of these at once, but with up to four different connections ...

The Arduino Nano and Raspberry Pi Pico have distinct pin configurations ... MISO, and SCK), and one I2C/TWI (pins A4 and A5 as SDA and SCL). The Pico, however, doubles these numbers.