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Arduino Communication Peripherals: UART, I2C and SPI - Latest Open Tech From Seeed
CH341 USB SPI I2C UART ISP dongle - .[ZooBaB].
Adafruit FT232H Breakout - General Purpose USB to GPIO, SPI, I2C [USB C & Stemma QT] : ID 2264 : $14.95 : Adafruit Industries, Unique & fun DIY electronics and kits