Por un escritor de hombre misterioso
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
Raspberry Pi Documentation - Raspberry Pi hardware
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UART vs. SPI vs. I2C Routing Guidelines: How to Layout These Common Buses, Blogs
USB TO UART/I2C/SPI/JTAG - Waveshare Wiki
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RaspberryPi 4B/3B Expansion Board With SPI To RS232 Serial Port Module – Genova Industrial