The original DCC++ project is no longer maintained.
For current documentation on using DCC-EX with JMRI, see the
EX-CommandStation (DCC-EX) page.
DCC++ was an Open Source Arduino-based Do-it-Yourself DCC Command Station. It has been replaced by the EX-CommandStation by the DCC-EX team, which continues to function with JMRI and runs on the existing DCC++ hardware.
JMRI continues to support older DCC++ Base Stations via the same DCC-EX connection used for EX-CommandStations. From the JMRI Preferences, select DCC-EX as the System Manufacturer.
The original Arduino-based DCC++ project is documented in these TrainBoard threads:
The original DCC++ GitHub organization: github.com/DccPlusPlus