diff --git a/fhem/FHEM/00_MQTT2_SERVER.pm b/fhem/FHEM/00_MQTT2_SERVER.pm
index 3ca8b486e..f6c870aea 100644
--- a/fhem/FHEM/00_MQTT2_SERVER.pm
+++ b/fhem/FHEM/00_MQTT2_SERVER.pm
@@ -9,11 +9,10 @@ use warnings;
 use TcpServerUtils;
 use MIME::Base64;
 
-sub MQTT2_SERVER_Parse($$$);
 sub MQTT2_SERVER_Read($@);
 sub MQTT2_SERVER_Write($$$);
 sub MQTT2_SERVER_Undef($@);
-sub MQTT2_SERVER_doPublish($$$;$$);
+sub MQTT2_SERVER_doPublish($$$$;$);
 
 
 # See also:
@@ -25,6 +24,7 @@ MQTT2_SERVER_Initialize($)
   my ($hash) = @_;
 
   $hash->{Clients} = ":MQTT2_DEVICE:";
+  $hash->{MatchList}= { "1:MQTT2_DEVICE"  => "^.*" },
   $hash->{ReadFn}  = "MQTT2_SERVER_Read";
   $hash->{DefFn}   = "MQTT2_SERVER_Define";
   $hash->{AttrFn}  = "MQTT2_SERVER_Attr";
@@ -61,7 +61,7 @@ MQTT2_SERVER_Define($$)
     Log3 $hash, 1, "$ret. Exiting.";
     exit(1);
   }
-  $hash->{NRCLIENTS} = 0;
+  readingsSingleUpdate($hash, "nrclients", 0, 0);
   $hash->{clients} = {};
   $hash->{retain} = {};
   InternalTimer(1, "MQTT2_SERVER_keepaliveChecker", $hash, 0);
@@ -73,12 +73,15 @@ MQTT2_SERVER_keepaliveChecker($)
 {
   my ($hash) = @_;
   my $now = gettimeofday();
-  foreach my $clName (keys %{$hash->{clients}}) {
-    my $cHash = $defs{$clName};
-    next if(!$cHash || !$cHash->{keepalive} ||
-             $now < $cHash->{lastMsgTime}+$cHash->{keepalive}*1.5 );
-    Log3 $hash, 3, "$hash->{NAME}: $clName left us (keepalive check)";
-    CommandDelete(undef, $clName);
+  my $multiplier = AttrVal($hash, "keepaliveFactor", 1.5);
+  if($multiplier) {
+    foreach my $clName (keys %{$hash->{clients}}) {
+      my $cHash = $defs{$clName};
+      next if(!$cHash || !$cHash->{keepalive} ||
+               $now < $cHash->{lastMsgTime}+$cHash->{keepalive}*$multiplier );
+      Log3 $hash, 3, "$hash->{NAME}: $clName left us (keepalive check)";
+      CommandDelete(undef, $clName);
+    }
   }
   InternalTimer($now+10, "MQTT2_SERVER_keepaliveChecker", $hash, 0);
 }
@@ -93,11 +96,12 @@ MQTT2_SERVER_Undef($@)
 
   my $shash = $defs{$sname};
   delete($shash->{clients}{$hash->{NAME}});
-  $shash->{NRCLIENTS}--;
+  readingsSingleUpdate($shash, "nrclients",
+                       ReadingsVal($sname, "nrclients", 1)-1, 1);
 
   if($hash->{lwt}) {    # Last will
     my ($tp, $val) = split(':', $hash->{lwt}, 2);
-    MQTT2_SERVER_doPublish($shash, $tp, $val, undef, $hash->{cflags} & 0x20);
+    MQTT2_SERVER_doPublish($shash, $shash, $tp, $val, $hash->{cflags} & 0x20);
   }
   return $ret;
 }
@@ -133,7 +137,7 @@ MQTT2_SERVER_Set($@)
     return "Usage: publish -r topic [value]" if(@a < 1);
     my $tp = shift(@a);
     my $val = join(" ", @a);
-    MQTT2_SERVER_doPublish($hash, $tp, $val, undef, $retain);
+    MQTT2_SERVER_doPublish($hash->{CL}, $hash, $tp, $val, $retain);
   }
 }
 
@@ -167,7 +171,8 @@ MQTT2_SERVER_Read($@)
     my $nhash = TcpServer_Accept($hash, "MQTT2_SERVER");
     return if(!$nhash);
     $nhash->{CD}->blocking(0);
-    $hash->{NRCLIENTS}++;
+    readingsSingleUpdate($hash, "nrclients",
+                         ReadingsVal($hash->{NAME}, "nrclients", 0)+1, 1);
     return;
   }
 
@@ -280,7 +285,7 @@ MQTT2_SERVER_Read($@)
     $val = substr($pl, $off);
     Log3 $sname, 4, "$cname $hash->{cid} $cpt $tp:$val";
     addToWritebuffer($hash, pack("CCnC*", 0x40, 2, $pid)) if($qos); # PUBACK
-    MQTT2_SERVER_doPublish($defs{$sname}, $tp, $val, $cname, $cf & 0x01);
+    MQTT2_SERVER_doPublish($hash, $defs{$sname}, $tp, $val, $cf & 0x01);
 
   ####################################
   } elsif($cpt eq "SUBSCRIBE") {
@@ -328,25 +333,29 @@ MQTT2_SERVER_Read($@)
 ######################################
 # Call sendto for all clients + Dispatch + dotrigger if rawEvents is set
 sub
-MQTT2_SERVER_doPublish($$$;$$)
+MQTT2_SERVER_doPublish($$$$;$)
 {
-  my ($hash, $tp, $val, $src, $retain) = @_;
+  my ($src, $tgt, $tp, $val, $retain) = @_;
   $val = "" if(!defined($val));
+  $src = $tgt if(!defined($src));
 
   if($retain) {
     my $now = gettimeofday();
     my %h = ( ts=>$now, val=>$val );
-    $hash->{retain}{$tp} = \%h;
+    $tgt->{retain}{$tp} = \%h;
   }
 
-  foreach my $clName (keys %{$hash->{clients}}) {
-    MQTT2_SERVER_sendto($defs{$clName}, $tp, $val) if(!$src || $src ne $clName);
+  foreach my $clName (keys %{$tgt->{clients}}) {
+    MQTT2_SERVER_sendto($defs{$clName}, $tp, $val) if($src->{NAME} ne $clName);
   }
 
-  Dispatch($hash, "$tp:$val", undef, 1);
-
-  my $re = AttrVal($hash->{NAME}, "rawEvents", undef);
-  DoTrigger($hash->{NAME}, "$tp:$val") if($re && $tp =~ m/$re/);
+  if($src->{cid}) { # "real" MQTT client
+    my $cid = $src->{cid};
+    $cid =~ s,[^a-z0-9._],_,gi;
+    Dispatch($tgt, "$cid:$tp:$val", undef, 1);
+    my $re = AttrVal($tgt->{NAME}, "rawEvents", undef);
+    DoTrigger($tgt->{NAME}, "$tp:$val") if($re && $tp =~ m/$re/);
+  }
 }
 
 ######################################
@@ -382,7 +391,7 @@ sub
 MQTT2_SERVER_Write($$$)
 {
   my ($hash,$topic,$msg) = @_;
-  MQTT2_SERVER_doPublish($hash, $topic, $msg);
+  MQTT2_SERVER_doPublish($hash, $hash, $topic, $msg);
 }
 
 sub
@@ -490,6 +499,18 @@ MQTT2_SERVER_getStr($$)
       Should only be used, if there is no MQTT2_DEVICE to process the topic.
       </li><br>
 
+    <a name="keepaliveFactor"></a>
+    <li>keepaliveFactor<br>
+      the oasis spec requires a disconnect, if after 1.5 times the client
+      supplied keepalive no data or PINGREQ is sent. With this attribute you
+      can modify this factor, 0 disables the check. 
+      Notes:
+      <ul>
+        <li>dont complain if you set this attribute to less or equal to 1.</li>
+        <li>MQTT2_SERVER checks the keepalive only every 10 second.</li>
+      </ul>
+      </li>
+    
     <a name="SSL"></a>
     <li>SSL<br>
       Enable SSL (i.e. TLS)
diff --git a/fhem/FHEM/10_MQTT2_DEVICE.pm b/fhem/FHEM/10_MQTT2_DEVICE.pm
index 90b8ed7d1..370e60f6e 100644
--- a/fhem/FHEM/10_MQTT2_DEVICE.pm
+++ b/fhem/FHEM/10_MQTT2_DEVICE.pm
@@ -2,8 +2,6 @@
 # $Id$
 package main;
 
-# TODO: autocreate
-
 use strict;
 use warnings;
 use SetExtensions;
@@ -46,6 +44,7 @@ MQTT2_DEVICE_Define($$)
   my @a = split("[ \t][ \t]*", $def);
   my $name = shift @a;
   my $type = shift @a; # always MQTT2_DEVICE
+  shift(@a) if(@a && $a[0] eq "autocreated");
 
   return "wrong syntax for $name: define <name> MQTT2_DEVICE" if(int(@a));
 
@@ -72,10 +71,11 @@ MQTT2_DEVICE_Parse($$)
     }
   }
 
-  my ($topic, $value) = split(":", $msg, 2);
+  my ($cid, $topic, $value) = split(":", $msg, 3);
   my $dp = $modules{MQTT2_DEVICE}{defptr};
   foreach my $re (keys %{$dp}) {
-    next if($msg !~ m/^$re$/s);
+    next if(!("$topic:$value" =~ m/^$re$/s ||
+              "$cid:$topic:$value" =~ m/^$re$/s));
     foreach my $dev (keys %{$dp->{$re}}) {
       next if(IsDisabled($dev));
       my @retData;
@@ -86,13 +86,15 @@ MQTT2_DEVICE_Parse($$)
       if($code =~ m/^{.*}$/s) {
         $code = EvalSpecials($code, ("%TOPIC"=>$topic, "%EVENT"=>$value));
         my $ret = AnalyzePerlCommand(undef, $code);
-        readingsBeginUpdate($hash);
-        foreach my $k (keys %{$ret}) {
-          readingsBulkUpdate($hash, $k, $ret->{$k});
-          push(@retData, "$k $ret->{$k}");
-          checkForGet($hash, $k, $ret->{$k});
+        if($ret && ref $ret eq "HASH") {
+          readingsBeginUpdate($hash);
+          foreach my $k (keys %{$ret}) {
+            readingsBulkUpdate($hash, $k, $ret->{$k});
+            push(@retData, "$k $ret->{$k}");
+            checkForGet($hash, $k, $ret->{$k});
+          }
+          readingsEndUpdate($hash, 1);
         }
-        readingsEndUpdate($hash, 1);
 
       } else {
         readingsSingleUpdate($hash, $code, $value, 1);
@@ -104,6 +106,27 @@ MQTT2_DEVICE_Parse($$)
     }
   }
 
+  # autocreate, init readingList if message is a json string
+  # deactivated, as there are a lot of messages to be catched
+# if(!@ret) {
+#   my $nn = "MQTT2_$cid";
+#   if(!$defs{$nn} && $cid !~ m/mosqpub.*/) {
+#     PrioQueue_add(sub{
+#       return if(!$defs{$nn});
+#       if($value =~ m/^{.*}$/) {
+#         my %ret = MQTT2_JSON($msg);
+#         if(keys %ret) {
+#           CommandAttr(undef,
+#                     "$nn readingList $cid:$topic:.* { MQTT2_JSON(\$EVENT) }");
+#         }
+#       }
+#       $defs{$nn}{autocreated_on} = $msg;
+#     }, undef);
+#     return "UNDEFINED $nn MQTT2_DEVICE autocreated"
+#   }
+#   return "";
+# }
+
   return @ret;
 }
 
@@ -274,6 +297,7 @@ MQTT2_DEVICE_Attr($$)
       return undef;
     }
 
+    return "$dev attr $attrName: more parameters needed" if(!$param); #90145
     foreach my $el (split("\n", $param)) {
       my ($par1, $par2) = split(" ", $el, 2);
       next if(!$par1);
@@ -394,11 +418,13 @@ MQTT2_DEVICE_Undef($$)
     <a name="readingList"></a>
     <li>readingList &lt;regexp&gt; [readingName|perl-Expression] ...
       <br>
-      If the regexp matches topic:message either set readingName to
-      the published message, or evaluate the perl expression, which has to
-      return a hash consisting of readingName=>readingValue entries.
+      If the regexp matches topic:message or cid:topic:message either set
+      readingName to the published message, or evaluate the perl expression,
+      which has to return a hash consisting of readingName=>readingValue
+      entries.
       You can define multiple such tuples, separated by newline, the newline
-      does not have to be entered in the FHEMWEB frontend.<br>
+      does not have to be entered in the FHEMWEB frontend. cid is the client-id
+      of the sending device.<br>
       Example:<br>
       <code>
         &nbsp;&nbsp;attr dev readingList\<br>
diff --git a/fhem/FHEM/93_FHEM2FHEM.pm b/fhem/FHEM/93_FHEM2FHEM.pm
index 34dd0565a..fc4c5a89b 100644
--- a/fhem/FHEM/93_FHEM2FHEM.pm
+++ b/fhem/FHEM/93_FHEM2FHEM.pm
@@ -59,9 +59,10 @@ FHEM2FHEM_Define($$)
     my $iodev = $defs{$rdev};
     return "Undefined local device $rdev" if(!$iodev);
     $hash->{rawDevice} = $rdev;
-    $hash->{Clients} = $iodev->{Clients};
-    $hash->{Clients} = $modules{$iodev->{TYPE}}{Clients}
-        if(!$hash->{Clients});
+
+    my $iomod = $modules{$iodev->{TYPE}};
+    $hash->{Clients} = $iodev->{Clients} ? $iodev->{Clients} :$iomod->{Clients};
+    $hash->{MatchList} = $iomod->{MatchList} if($iomod->{MatchList});
 
   }