Chapter · I2C

The bus

Why every module can share two wires, and what the two wires are.

  1. 01Why a bus3 minA microcontroller runs out of pins long before you run out of modules to plug into it. I2C connects every one of them with the same two wires, and one more module costs no pins at all.

Start at 01 and read down — the order is the order things get easier in. Or take the one with your part in it; every article stands on its own, and links back to whatever it needs.