For years, there has been a clear distinction between the Arduino and Raspberry Pi boards ... you can access one UART (pins D0 and D1 as RX and TX), one SPI (pins D10 to D13 as SS, MOSI, MISO ...

To do this, he chose the Raspberry Pi as base, and wrote C code that that anyone who has done a bit of Arduino programming should be able to understand and modify. The hardware is designed to be ...