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Arduino's Wire Library: What It Is & How It Worksincluding the latest Arduino Nano Every model. The I2C protocol only requires two wires to connect external devices. One wire (called serial data or SDA) is responsible for transferring data ...
inspiring [James] to design a completely new module based on an Arduino Nano. Hooking it up to the Psion’s data bus was a simple matter of wiring up the eight data lines to the Nano’s GPIO ports.
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