One wire (called serial data or SDA ... With minimal commands to learn and a simple setup, you can start using the library in your Arduino sketches in no time.

[BrendaEM]’s RDL is a generic stepper motor driver environment that you can flash into an Arduino. RDL talks to your computer or cell phone over serial, and can command a stepper-driver IC to ...

A GPS unit and a Bluetooth-to-serial were tying up all the hardware ... which is done in his library using the usual Arduino setup step. A buffer takes care of storing all the different channels ...