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 ...

Fitting in the size of a small portable keyboard, it’s got a Pi 4 processor of the 20% speedier 1.8 GHz variety, 4 GB of RAM, wireless, Ethernet, dual HDMI outputs, and even a 40-pin Raspberry ...

Power over Ethernet (PoE) is nothing new to the Raspberry Pi. Introduced with the Raspberry Pi 3B+, PoE provides power over a network connection and is handy for installing a Raspberry Pi in a ...