While the Raspberry Pi has very good support ... that allows him to open an SPI connection, initialize, transfer, and close the connection. After connecting an Arduino to the MOSI, MISO and ...

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 ...

Last December, Debashis wrote about the Waveshare Double Eye LCD module comprised of two round displays that can be useful for robotics or art projects since they can be made to look like googly eyes.