diff --git a/obp60v.conf-sample b/obp60v.conf-sample
index 076c5a0..e43205a 100644
--- a/obp60v.conf-sample
+++ b/obp60v.conf-sample
@@ -45,6 +45,7 @@ mqtt_user = demo
 mqtt_pass = 123456
 orgname = demo
 passcode = 123456
+trace = false
 
 [boat]
 name = MY boat
diff --git a/obp60v.py b/obp60v.py
index 1f311b0..5af1357 100755
--- a/obp60v.py
+++ b/obp60v.py
@@ -750,6 +750,7 @@ if __name__ == "__main__":
     cfg['tracker']['orgname'] = config.get('tracker', 'orgname')
     cfg['tracker']['passcode'] = config.get('tracker', 'passcode')
     cfg['tracker']['logdir'] = cfg['logdir']
+    cfg['tracker']['trace'] =  config.getboolean('tracker', 'trace')
 
     # Boat data
     cfg['boat']['name'] = config.get('boat', 'name')
diff --git a/tracker.py b/tracker.py
index ecd0258..adc1613 100644
--- a/tracker.py
+++ b/tracker.py
@@ -27,6 +27,9 @@ class Tracker():
             raise TypeError(f"Invalid tracker type: '{valtype}'. Only supported: {validtypes}")
         self.ttype = trackertype
         self.activated = False
+        self.trace = False   # Debugging
+        self.trace_fh = None # File Handle der Tracedatei
+
         self.races = set()   # Liste der Regatten, eindeutige Namen
         self.courses = set() # Liste der Bahnen, eindeutige Namen
 
@@ -74,6 +77,12 @@ class Tracker():
         """
         TODO raceid über userdata? dann topic prüfen?
         """
+        if self.trace:
+            self.trace_fh.write(msg.topic)
+            self.trace_fh.write("\n")
+            self.trace_fh.write(msg.payload.decode())
+            self.trace_fh.write("\n\n")
+            self.trace_fh.flush()
         if msg.topic == "regattahero/orgstatus/thomas":
             # kommt alle 10s
             orgstatus = json.loads(msg.payload)
@@ -127,6 +136,7 @@ class Tracker():
 
     def mqtt_tracker(self, cfg, boat, appdata, boatdata):
         print("MQTT tracker enabled")
+        self.trace = cfg['trace']
         client = mqtt.Client()
         client.on_connect = self.mqtt_on_connect
         client.on_message = self.mqtt_on_message
@@ -137,9 +147,10 @@ class Tracker():
             print("MQTT connection refused. Check username and password.")
             return
 
-        tracefile = os.path.join(os.path.expanduser(cfg['logdir']), 'tracker.log')
-        trace_fh = open(tracefile, 'w+')
-        client.user_data_set({'trace': trace_fh})
+        if cfg['trace']:
+            # TODO Log Hinweis
+            tracefile = os.path.join(os.path.expanduser(cfg['logdir']), 'tracker.log')
+            self.trace_fh = open(tracefile, 'w+')
 
         topic = "regattahero/tracker/" + cfg['orgname']
         payload = {
@@ -176,7 +187,7 @@ class Tracker():
             time.sleep(1)
             if appdata.track.is_active():
                 self.mqtt_publish(client, topic, payload, bv_lat, bv_lon, bv_sog)
-        print("MQTT tracker shutdown")
         client.loop_stop()
         client.disconnect()
-        trace_fh.close()
+        if cfg['trace']:
+            self.trace_fh.close()