diff --git a/DCCEXParser.cpp b/DCCEXParser.cpp
index 388cf60..6779178 100644
--- a/DCCEXParser.cpp
+++ b/DCCEXParser.cpp
@@ -679,25 +679,29 @@ bool DCCEXParser::parseT(Print *stream, int16_t params, int16_t p[])
           // turnout 1 or T=THROW, 0 or C=CLOSE
           case 1: case 0x54:  // 1 or T
             if (!Turnout::setClosed(p[0], false)) return false;
+            p[1] = 1;
             break;
           case 0: case 0x43:  // 0 or C
             if (!Turnout::setClosed(p[0], true)) return false;
+            p[1] = 0;
             break;
 #else
           // turnout 0 or T=THROW,1 or C=CLOSE
           case 0: case 0x54:  // 0 or T
             if (!Turnout::setClosed(p[0], false)) return false;
+            p[1] = 0;
             break;
           case 1: case 0x43:  // 1 or C
             if (!Turnout::setClosed(p[0], true)) return false;
+            p[1] = 1;
             break;
 #endif
           default:
             return false;
         }
-        // Send acknowledgement to caller, and to Serial.
-        StringFormatter::send(stream, F("<H %d %d>\n"), p[0], p[1]);
-        if (stream != &Serial) StringFormatter::send(Serial, F("<H %d %d>\n"), p[0], p[1]);
+        // Send acknowledgement to caller if the command was not received over Serial (acknowledgement
+        // messages on Serial are sent by the Turnout class).
+        if (stream != &Serial) StringFormatter::send(stream, F("<H %d %d>\n"), p[0], p[1]);
         return true;
 
     default: // Anything else is some kind of create function.
diff --git a/Turnouts.cpp b/Turnouts.cpp
index 0869a58..8a77f57 100644
--- a/Turnouts.cpp
+++ b/Turnouts.cpp
@@ -125,7 +125,12 @@ const int16_t HASH_KEYWORD_VPIN=-415;
 
   #if defined(RMFT_ACTIVE)
     RMFT2::turnoutEvent(id, closeFlag);
-  #endif  
+  #endif
+
+    // Send message to JMRI etc. over Serial USB.  This is done here
+    // to ensure that the message is sent when the turnout operation
+    // is not initiated by a Serial command.
+    StringFormatter::send(Serial, F("<H %d %d>\n"), id, closeFlag);
 
     return ok;
   }
diff --git a/Turnouts.h b/Turnouts.h
index 6f6c408..6659c24 100644
--- a/Turnouts.h
+++ b/Turnouts.h
@@ -466,7 +466,8 @@ public:
   }
 
   bool activate(bool close) override {
-    LCN::send('T', _turnoutData.id, close);
+    // Assume that the LCN command still uses 1 for throw and 0 for close...
+    LCN::send('T', _turnoutData.id, !close);
     // The _turnoutData.closed flag should be updated by a message from the LCN master, later.
     return true;
   }