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We've gotten used to the GPIO-available functions of Raspberry Pi computers remaining largely the same over the years, which is why it might have flown a little bit under the radar: the Raspberry Pi 4
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Raspberry Pi SPI and I2C Tutorial - SparkFun Learn
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Part Number: Serial Expansion HAT There is only 1-ch UART port on the original Raspberry Pi, once it is used for terminal debugging, no more other
Serial Expansion HAT I2C Interface 2-ch Extra UART Plus 8 programmable GPIOs for Raspberry Pi Zero W WH 2B/3B/3B+/4B @XYGStudy
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Raspberry Pi SPI and I2C Tutorial - SparkFun Learn