As for UARTs, the Raspberry Pi’s one-and-a-half UART interface has long been an ... Main image remixed from Raspberry Pi 4 GPIO pinout diagram by [Les Pounder].

Raspberry Pi sent us one for review, and if you were just about to pick up a Pi 4 for a project that needs ... an ARM debug / UART on a three pin header, and a JST battery connector to keep ...

Since the Pico and Pico W feature identical sizes and GPIO pinout ... cheaper at $4, while you can get the Pico W for $6.