diff --git a/fhem/FHEM/10_OWServer.pm b/fhem/FHEM/10_OWServer.pm
index a928fa29a..befee6ee2 100644
--- a/fhem/FHEM/10_OWServer.pm
+++ b/fhem/FHEM/10_OWServer.pm
@@ -43,6 +43,7 @@ use vars qw(%owfamily);
   "12"  => "DS2406 DS2507",
   "1B"  => "DS2436",
   "1D"  => "DS2423",
+  "1F"  => "DS2409",
   "20"  => "DS2450",
   "22"  => "DS1822",
   "23"  => "DS2433",
diff --git a/fhem/FHEM/11_OWDevice.pm b/fhem/FHEM/11_OWDevice.pm
index 3f6f3780c..494bde0d0 100644
--- a/fhem/FHEM/11_OWDevice.pm
+++ b/fhem/FHEM/11_OWDevice.pm
@@ -121,6 +121,14 @@ $owdevice{"1D"} = {
     "offset"    => [ qw(counters.A counters.B) ],
     "interface" => "counter",
 };
+$owdevice{"1F"} = {
+    # DS2409 - Microlan Coupler
+    "read"      => [],
+    "write"     => [],
+    "poll"      => [],
+    "state"     => [],
+    "interface" => "none",
+};
 $owdevice{"20"} = {
     # DS2450 - Quad A/D Converter
     "read"      => [ qw(alarm/high.A alarm/high.B alarm/high.C alarm/high.D alarm/high.ALL),
@@ -222,9 +230,10 @@ $owdevice{"26"} = {
                      qw(HIH4000/humidity),
                      qw(HTM1735/humidity),
                      qw(DATANAB/humidity),
+                     qw(HIH3600/humidity),
                      qw(humidity),
                      qw(B1-R1-A/pressure B1-R1-A/gain B1-R1-A/offset),
-                     qw(S3-R1-A/current S3-R1-A/illumination S3-R1-A/gain),
+                     qw(S3-R1-A/current S3-R1-A/illumination S3-R1-A/illuminance S3-R1-A/gain),
                      qw(MultiSensor/type),
                      qw(offset) ],
     "write"     => [ qw(pages/page.0 pages/page.1 pages/page.2 pages/page.3 pages/page.4),
@@ -392,7 +401,10 @@ OWDevice_GetDetails($) {
 
   my ($hash)= @_;
 
-  my $family= substr($hash->{fhem}{address}, 0, 2);
+  my @path= split('/', $hash->{fhem}{address});
+  my $address= $path[-1];
+  #main::Debug "address is $address";
+  my $family= substr($address, 0, 2);
   my @getters= @{$owdevice{$family}{"read"}};
   my @setters= @{$owdevice{$family}{"write"}};
   my @polls= @{$owdevice{$family}{"poll"}};
@@ -459,6 +471,7 @@ OWDevice_ReadValue($$) {
         my $path = "$cache/$address/$reading";
         $path .= AttrVal($hash->{NAME},"resolution","") if( $reading eq "temperature" );
         #my ($seconds, $microseconds) = gettimeofday();
+        #main::Debug "OWDevice_ReadValue NAME=" . $hash->{NAME} . " path=$path";
         my $value= OWDevice_ReadFromServer($hash,"read",$path);
         #my ($seconds2, $microseconds2) = gettimeofday();
         #my $msec = sprintf( "%03d msec", (($seconds2-$seconds)*1000000 + $microseconds2-$microseconds)/1000 );
@@ -476,13 +489,14 @@ OWDevice_ReadValue($$) {
 }
 
 ###################################
-sub
-OWDevice_WriteValue($$$) {
+sub OWDevice_WriteValue($$$) {
 
         my ($hash,$reading,$value)= @_;
 
+        my $cache= (AttrVal($hash->{NAME},"uncached","")) ? "/uncached" : "";
         my $address= $hash->{fhem}{address};
-        IOWrite($hash, "/$address/$reading", $value);
+        my $path = "$cache/$address/$reading";
+        IOWrite($hash, $path, $value);
         return $value;
 }
 
@@ -762,6 +776,10 @@ OWDevice_InitValues($)
     Defines a 1-wire device. The 1-wire device is identified by its <address>. It is
     served by the most recently defined <a href="#OWServer">OWServer</a>.
     <br><br>
+    Devices beyond 1-wire hubs (DS2409, address family 1F) need to be addressed by the full path, e.g.
+    <code>1F.0AC004000000/main/26.A157B6000000</code> (no leading slash). They are
+    not automatically detected.
+    <br><br>
 
     If &lt;interval&gt; is given, the OWServer is polled every &lt;interval&gt; seconds for
     a subset of readings.
@@ -793,6 +811,7 @@ OWDevice_InitValues($)
       <li>DS2408 - 1-Wire 8 Channel Addressable Switch</li>
       <li>DS2413 - Dual Channel Addressable Switch</li>
       <li>DS1825 - Programmable Resolution 1-Wire Digital Thermometer with ID</li>
+      <li>DS2409 - Microlan Coupler (no function implemented)</li>
       <li>EDS0066 - Multisensor for temperature and pressure</li>
       <li>LCD - LCD controller by Louis Swart</li>
     </ul>
@@ -921,6 +940,10 @@ OWDevice_InitValues($)
     Definiert ein 1-Wire- Gerät. 1-Wire- Geräte werden anhand ihrer Adresse &lt;address&gt; definiert. Diese wird
     durch den zuvor eingerichteten <a href="#OWServer">OWServer</a> bereitgestellt.
     <br><br>
+    Ger&auml;te hinter 1-wire-Hubs (DS2409, Adressfamilie 1F) m&uuml;ssen &uuml;ber den vollen Pfad adressiert werden, z.B.
+    <code>1F.0AC004000000/main/26.A157B6000000</code> (kein f&uuml;hrender Schr&auml;gstrich). Sie werden nicht
+    automatisch erkannt.
+    <br><br>
 
     Wird zusätzlich  &lt;interval&gt; angegeben, ruft OWServer alle &lt;interval&gt; Sekunden
     einen Datensatz des Gerätes ab.