Reply to "TMCC Control With Arduino"

With Randy's guidance and some Hall-effect current detectors (one per block) and RFID train identification and registration I can easily run 4 Legacy/TMCC trains around a single 140' curvy loop using just the Arduino Mega talking RS-232 to the TMCC base (but could talk to Legacy as well).  They also can start and stop automatically, as desired.  I can measure the speed and gap for each train and send commands to each engine to keep the gap constant.  Operators have hand-held controllers but just for emergencies and some hands-on fun, usually the controllers are not needed.  As Randy said, I send only the 3-byte TMCC commands and I can control the basic functions on both Legacy and TMCC engines.