The IoTT DCC Interface breakout board converts DCC track signals of all scale voltages to a galvanically separate 3.3V or 5V pulse that can be interpreted by a microcontroller.
On the input side, the track wires are connected to a screw terminal.
Galvanic separation of the track signal and the computer is achieved using hi-speed opto-couplers.
The microcontroller side features a Grove port connector (digital type) with 4 pins:
Pin 1: DCC signal from interface to microcontroller
Pin 2: Microcontroller output to current pulse generator (for e.g.programming track ACK pulse)
Pin 3: VCC (either 5V or 3.3V)
Pin 4: GND
See this article for more information on the Grove port system: https://wiki.seeedstudio.com/Grove_System/
The IoTT DCC interface can be connected to the Grove port of the IoTT Stick and provides DCC input from the layout to the IoTT Stick.