Each wire is routed to the RX pin of two different serial to USB adapters. This way, the data being sent from the Arduino shows up ... The schematic and source code to this project can be found ...

After some research, it was determined that it would be relatively simple to have an Arduino convert incoming serial data into a parallel ... or Clear to Send pin, on the serial side of things.

The Arduino ... transferring data, while the other wire (serial clock or SLC) is used to synchronize the data exchange via a pulsing signal. Combined, they allow two devices to send and receive ...