diff --git a/fhem/docs/commandref_frame.html b/fhem/docs/commandref_frame.html
index cc4e15c97..22e8f0e69 100644
--- a/fhem/docs/commandref_frame.html
+++ b/fhem/docs/commandref_frame.html
@@ -67,6 +67,7 @@
       <a href="#setdefaultattr">setdefaultattr</a> &nbsp; <!-- define a default attribute -->
       <a href="#setreading">setreading</a> &nbsp; <!-- set a reading for a FHEM device -->
       <a href="#setstate">setstate</a> &nbsp; <!-- set the main state of a FHEM device -->
+      <a href="#setuuid">setuuid</a> &nbsp;         <!-- set the FUUID internal -->
       <a href="#shutdown">shutdown</a> &nbsp; <!-- shut down (terminate) FHEM -->
       <a href="#sleep">sleep</a> &nbsp;     <!-- sleep (delay execution) for a while -->
       <a href="#trigger">trigger</a> &nbsp; <!-- generate a FHEM event -->
@@ -1297,6 +1298,17 @@ The following local attributes are used by a wider range of devices:
 </ul>
 <!-- setstate end -->
 
+<a name="setuuid"></a>
+<h3>setuuid</h3>
+<ul>
+  <code>setuuid &lt;device&gt; &lt;uuid&gt;</code>
+  <br><br>
+  System command, used to set the FUUID internal value.
+  Not intended to be used by an end user.
+</ul>
+<!-- setstate end -->
+
+
 <a name="shutdown"></a>
 <h3>shutdown</h3>
 <ul>
diff --git a/fhem/docs/commandref_frame_DE.html b/fhem/docs/commandref_frame_DE.html
index 42740e5cd..1f1137a53 100644
--- a/fhem/docs/commandref_frame_DE.html
+++ b/fhem/docs/commandref_frame_DE.html
@@ -68,6 +68,7 @@
       <a href="#setdefaultattr">setdefaultattr</a> &nbsp; <!-- definiert ein "default" Attribut -->
       <a href="#setreading">setreading</a> &nbsp; <!-- setzt ein Reading f&uuml;r ein FHEM Ger&auml;t -->
       <a href="#setstate">setstate</a> &nbsp; <!-- setzt den Status eines  FHEM Ger&aumles -->
+      <a href="#setuuid">setuuid</a> &nbsp; <!-- setzt den internen FUUID Wert -->
       <a href="#shutdown">shutdown</a> &nbsp; <!-- beendet FHEM -->
       <a href="#sleep">sleep</a> &nbsp;     <!-- verz&ouml;gerte Ausf&uuml;hrung -->
       <a href="#trigger">trigger</a> &nbsp; <!-- generiert ein FHEM Event -->
@@ -1380,6 +1381,16 @@ Die folgenden lokalen Attribute werden von mehreren Ger&auml;ten verwendet:
 <!-- setstate end -->
 
 
+<a name="setuuid"></a>
+<h3>setuuid</h3>
+<ul>
+  <code>setuuid &lt;device&gt; &lt;uuid&gt;</code>
+  <br><br>
+  Systembefehl, um den FUUID internen Wert zu setzen.
+  Ist nicht vom Benutzer zu verwenden.
+</ul>
+<!-- setstate end -->
+
 <a name="shutdown"></a>
 <h3>shutdown</h3>
 <ul>
diff --git a/fhem/fhem.pl b/fhem/fhem.pl
index 353965ec4..cd1e1795b 100755
--- a/fhem/fhem.pl
+++ b/fhem/fhem.pl
@@ -180,6 +180,7 @@ sub CommandSave($$);
 sub CommandSet($$);
 sub CommandSetReading($$);
 sub CommandSetstate($$);
+sub CommandSetuuid($$);
 sub CommandShutdown($$;$$);
 sub CommandSleep($$);
 sub CommandTrigger($$);
@@ -438,6 +439,7 @@ my %ra = (
             Hlp=>"<devspec> <reading> <value>,set reading for <devspec>" },
   "setstate"=> { Fn=>"CommandSetstate",
             Hlp=>"<devspec> <state>,set the state shown in the command list" },
+  "setuuid" => { Fn=>"CommandSetuuid", Hlp=>"" },
   "setdefaultattr" => { Fn=>"CommandDefaultAttr",
             Hlp=>"<attrname> <attrvalue>,set attr for following definitions" },
   "shutdown"=> { Fn=>"CommandShutdown",
@@ -1583,9 +1585,21 @@ WriteStatefile()
 }
 
 sub
-GetDefAndAttr($)
+CommandSetuuid($$)
 {
-  my ($d) = @_;
+  my ($cl, $param) = @_;
+  return "setuuid cannot be used after FHEM is initialized" if($init_done);
+  my @a = split(" ", $param);
+  return "Please define $param first" if(!defined($defs{$a[0]}));
+  $defs{$a[0]}{FUUID} = $a[1];
+  return undef;
+}
+
+
+sub
+GetDefAndAttr($;$)
+{
+  my ($d, $dumpFUUID) = @_;
   my @ret;
 
   if($d ne "global") {
@@ -1599,6 +1613,9 @@ GetDefAndAttr($)
     }
   }
 
+  push @ret, "setuuid $d $defs{$d}{FUUID}"
+        if($dumpFUUID && defined($defs{$d}{FUUID}) && $defs{$d}{FUUID});
+
   foreach my $a (sort {
                    return -1 if($a eq "userattr"); # userattr must be first
                    return  1 if($b eq "userattr");
@@ -1691,7 +1708,7 @@ CommandSave($$)
       next;
     }
 
-    my @arr = GetDefAndAttr($d);
+    my @arr = GetDefAndAttr($d, 1);
     print $fh join("\n", @arr)."\n" if(@arr);
 
   }
@@ -2017,6 +2034,7 @@ CommandDefine($$)
   my %hash;
 
   $hash{NAME}  = $name;
+  $hash{FUUID} = genUUID();
   $hash{TYPE}  = $m;
   $hash{STATE} = "???";
   $hash{DEF}   = $a[2] if(int(@a) > 2);
@@ -5830,4 +5848,13 @@ SecurityCheck()
   }
 }
 
+# 
+sub genUUID()
+{
+  srand(gettimeofday()) if(!$srandUsed);
+  $srandUsed = 1;
+  return sprintf("%08x-f33f-%s-%s-%s", time(), substr(getUniqueId(),-4), 
+    join("",map { unpack "H*", chr(rand(256)) } 1..2),
+    join("",map { unpack "H*", chr(rand(256)) } 1..8));
+}
 1;