In the Raspberry Pi 3B the Bluetooth uses the only UART which further limits the use of the Pi. Most solutions for External UART controllers come as a USB to UART converter, which takes up space ...

UART HAT is Add-on board for Raspberry Pi which provide two additional RS232 TTL serial ports with flow control which are both 5V and 3.3 V compatible in addition to the original Serial Port of ...

Specifically, in the list of connections there’s an “Arduino pin A0 to Raspberry Pi pin 8(UART TX) “. I think the dead end referred to not being able (for some reason) ...

There's also a new chip on the Pi 5, built by Pi, to take away I/O functions from the AP. The RP1 will handle two USB 3.0 and two 2.0 interfaces, a Gigabit Ethernet controller, camera and display ...