You only really need two data wires to transfer a ton of data. Standards like UART, USB2, I2C, SPI, PS/2, CAN, RS232, SWD (an interface to program MCUs), RS485, DMX, and many others, all are a ...
Raspberry PiにRS-485/422Aポートを追加可能、Modbusマスタ/スレーブ機能対応の拡張ボードを2月下旬発売 ※参考画像は添付の関連 ...