Fubuki Requirements libgpiod-dev Usage SPI spi_bus = 0 spi_device = 0 spi = Fubuki::SPI.new(spi_bus, spi_device) spi.transfer([0x01, 0x02, 0x03]) => [0x10, 0x20, 0x30] spi.close GPIO Fubuki::GPIO