diff --git a/src/ANT.cpp b/src/ANT.cpp
index db3f974a0..aa1672521 100644
--- a/src/ANT.cpp
+++ b/src/ANT.cpp
@@ -868,6 +868,11 @@ ANT::sendMessage(ANTMessage m) {
 //for(int i=0; i<m.length+3; i++) fprintf(stderr, "%02x ", m.data[i]);
 //fprintf(stderr, "\n");
 
+    struct timeval timestamp;
+    gettimeofday(&timestamp, NULL);
+    unsigned char RS='S';
+    emit sentAntMessage(RS, m, timestamp);
+
     rawWrite((uint8_t*)m.data, m.length);
 
     // this padding is important - do not remove it
@@ -948,7 +953,8 @@ ANT::processMessage(void) {
 
     struct timeval timestamp;
     get_timeofday (&timestamp);
-    emit receivedAntMessage(m, timestamp);
+    unsigned char RS = 'R';
+    emit receivedAntMessage(RS, m, timestamp);
 
     switch (rxMessage[ANT_OFFSET_ID]) {
         case ANT_NOTIF_STARTUP:
diff --git a/src/ANT.h b/src/ANT.h
index 876ae82e4..880fcba58 100644
--- a/src/ANT.h
+++ b/src/ANT.h
@@ -399,7 +399,8 @@ signals:
     // signal for passing remote control commands
     void antRemoteControl(uint16_t command);
 
-    void receivedAntMessage(const ANTMessage message, const struct timeval timestamp);
+    void receivedAntMessage(const unsigned char RS, const ANTMessage message, const struct timeval timestamp);
+    void sentAntMessage(const unsigned char RS, const ANTMessage message, const struct timeval timestamp);
 
 public slots:
 
diff --git a/src/ANTLogger.cpp b/src/ANTLogger.cpp
index 0cc9aaba7..b72217199 100644
--- a/src/ANTLogger.cpp
+++ b/src/ANTLogger.cpp
@@ -42,11 +42,13 @@ ANTLogger::close()
     isLogging=false;
 }
 
-void ANTLogger::logRawAntMessage(const ANTMessage message, const struct timeval timestamp)
+void ANTLogger::logRawAntMessage(const unsigned char RS, const ANTMessage message, const struct timeval timestamp)
 {
     if (isLogging) {
         QDataStream out(&antlog);
 
+        out << RS;
+
         uint64_t millis = (timestamp.tv_sec * (uint64_t)1000) + (timestamp.tv_usec / 1000);
 
         for (int i=0; i<8; i++) {
diff --git a/src/ANTLogger.h b/src/ANTLogger.h
index 2f23d6c14..b7a4bd423 100644
--- a/src/ANTLogger.h
+++ b/src/ANTLogger.h
@@ -33,7 +33,7 @@ public:
 signals:
 
 public slots:
-    void logRawAntMessage(const ANTMessage message, const struct timeval timestamp);
+    void logRawAntMessage(const unsigned char RS, const ANTMessage message, const struct timeval timestamp);
     void open();
     void close();
 
diff --git a/src/ANTlocalController.cpp b/src/ANTlocalController.cpp
index d209b6012..9259800db 100644
--- a/src/ANTlocalController.cpp
+++ b/src/ANTlocalController.cpp
@@ -44,7 +44,8 @@ ANTlocalController::ANTlocalController(TrainSidebar *parent, DeviceConfiguration
     connect(myANTlocal, SIGNAL(antRemoteControl(uint16_t)), this, SLOT(antRemoteControl(uint16_t)));
 
     // Connect a logger
-    connect(myANTlocal, SIGNAL(receivedAntMessage(const ANTMessage ,const timeval )), &logger, SLOT(logRawAntMessage(const ANTMessage ,const timeval)));
+    connect(myANTlocal, SIGNAL(receivedAntMessage(const unsigned char, const ANTMessage ,const timeval )), &logger, SLOT(logRawAntMessage(const unsigned char, const ANTMessage ,const timeval)));
+    connect(myANTlocal, SIGNAL(sentAntMessage(const unsigned char, const ANTMessage ,const timeval )), &logger, SLOT(logRawAntMessage(const unsigned char, const ANTMessage ,const timeval)));
 }
 
 void
diff --git a/src/antlog.py b/src/antlog.py
index c32821000..f5e8b4308 100755
--- a/src/antlog.py
+++ b/src/antlog.py
@@ -15,13 +15,17 @@ import os
 import struct
 
 file = open(sys.argv[1], 'rb')
-for line in range(0, os.path.getsize(sys.argv[1]), 20):
+for line in range(0, os.path.getsize(sys.argv[1]), 21):
+
+  data = file.read(1)
+  RS = data[0];
 
   data = file.read(8)
   timestamp = struct.unpack('L', data)[0]
 
   data = file.read(12)
-  print str(timestamp) + ': ' \
+  print str(timestamp) + ' - ' \
+      + RS  + ': ' \
       + '0x' + (data[0]).encode('hex').upper()  + ', ' \
       + '0x' + (data[1]).encode('hex').upper()  + ', ' \
       + '0x' + (data[2]).encode('hex').upper()  + ', ' \