The Raspberry Pi 4, on the other hand, is the predecessor of the Raspberry Pi 5. It was released in 2019, just a few months before the world shut down due to COVID-19.

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… ...

The Raspberry Pi 4’s GPIO header also supports more connections, with UART, SPI, and I2C interfaces each supported on four additional pins, and with fixed support for clock stretching over I2C ...

Famous in part for its small size, the Raspberry Pi line of inexpensive computers is famously no bigger than a deck of cards, and the Raspberry Pi 4 Model B measures just 3.4 x 2.2 x 0.4 inches.

Just like the Raspberry Pi 3, the Pi 4 starts at $35 for the version with 1GB of RAM. There are now higher tiers with more RAM: 2GB for $45 and 4GB for $55. Raspberry Pi says the Pi 4 will remain ...