diff --git a/FHEM/10_OWServer.pm b/FHEM/10_OWServer.pm
index fc2eeea2c..34397d5f0 100644
--- a/FHEM/10_OWServer.pm
+++ b/FHEM/10_OWServer.pm
@@ -244,7 +244,7 @@ OWServer_Read($@)
 {
   my ($hash,$path)= @_;
 
-  return undef unless(defined($hash->{fhem}{owserver}));
+  return undef unless(defined($hash->{fhem}{owserver}) || $hash->{LAST_READ_FAILED});
 
   my $ret= undef;
 
@@ -260,7 +260,7 @@ OWServer_Read($@)
       return undef;
     }
 
-    InternalTimer(gettimeofday()+10, "OWServer_TimeoutChild", $pid, 0);
+    InternalTimer(gettimeofday()+6, "OWServer_TimeoutChild", $pid, 0);
     if($pid == 0) {
       close READER;
       $ret= OWNet::read($hash->{DEF},$path);
@@ -286,16 +286,21 @@ OWServer_Read($@)
     if( $nfound ) {
       chomp($ret= <READER>);
       RemoveInternalTimer($pid);
+      OWServer_OpenDev($hash) if( $hash->{LAST_READ_FAILED} );
+      $hash->{LAST_READ_FAILED} = 0;
     } else {
       Log3 undef, 1, "OWServer: read timeout for child $pid";
-      $hash->{READ_FAILED} = 0 if( !$hash->{READ_FAILED} );
-      $hash->{READ_FAILED}++;
+      $hash->{NR_READ_FAILED} = 0 if( !$hash->{NR_READ_FAILED} );
+      $hash->{NR_READ_FAILED}++;
+      OWServer_CloseDev($hash) if( !$hash->{LAST_READ_FAILED} );
+      $hash->{LAST_READ_FAILED} = 1;
     }
     close READER;
 
   } else {
     $ret= $hash->{fhem}{owserver}->read($path);
     $ret =~ s/^\s+//g if(defined($ret));
+    $hash->{LAST_READ_FAILED} = 0;
   }
 
   # if a device does not exist, the server returns undef
@@ -319,7 +324,10 @@ OWServer_Write($@)
 {
   my ($hash,$path,$value)= @_;
 
+  return undef if($hash->{LAST_READ_FAILED});
+
   return undef unless(defined($hash->{fhem}{owserver}));
+
   return $hash->{fhem}{owserver}->write($path,$value);
 }
 
@@ -329,7 +337,10 @@ OWServer_Dir($@)
 {
   my ($hash,$path)= @_;
 
+  return undef if($hash->{LAST_READ_FAILED});
+
   return undef unless(defined($hash->{fhem}{owserver}));
+
   $path= ($path) ? $path : "/";
   return $hash->{fhem}{owserver}->dir($path);
 }
@@ -340,6 +351,8 @@ OWServer_Find($@)
 {
   my ($hash,$slave)= @_;
 
+  return undef if($hash->{LAST_READ_FAILED});
+
   return undef unless(defined($hash->{fhem}{owserver}));
 
   my $owserver= $hash->{fhem}{owserver};
diff --git a/FHEM/11_OWDevice.pm b/FHEM/11_OWDevice.pm
index 0ad53bae1..f7c50c4a9 100644
--- a/FHEM/11_OWDevice.pm
+++ b/FHEM/11_OWDevice.pm
@@ -416,6 +416,14 @@ OWDevice_ReadFromServer($$@)
     $ret = &{$modules{$iohash->{TYPE}}{FindFn}}($iohash, @a);
   }
   use strict "refs";
+
+  if( $iohash->{LAST_READ_FAILED} ) {
+    $hash->{NR_READ_FAILED} = 0 if( !$hash->{NR_READ_FAILED} );
+    $hash->{NR_READ_FAILED}++;
+    $hash->{LAST_READ_FAILED} = 1;
+  } else {
+    $hash->{LAST_READ_FAILED} = 0;
+  }
   return $ret;
 }
 
@@ -430,9 +438,9 @@ OWDevice_ReadValue($$) {
         my $cache= (AttrVal($hash->{NAME},"uncached","")) ? "/uncached" : "";
         my $path = "$cache/$address/$reading";
         $path .= AttrVal($hash->{NAME},"resolution","") if( $reading eq "temperature" );
-        my ($seconds, $microseconds) = gettimeofday();
+        #my ($seconds, $microseconds) = gettimeofday();
         my $value= OWDevice_ReadFromServer($hash,"read",$path);
-        my ($seconds2, $microseconds2) = gettimeofday();
+        #my ($seconds2, $microseconds2) = gettimeofday();
         #my $msec = sprintf( "%03d msec", (($seconds2-$seconds)*1000000 + $microseconds2-$microseconds)/1000 );
         #Debug "$path => $value; $msec";  
         if($interface ne "id") {
@@ -471,47 +479,40 @@ OWDevice_UpdateValues($) {
         my $state;
         if($#polls>=0) {
           my $address= $hash->{fhem}{address};
-          my $read_failed = 0;
           readingsBeginUpdate($hash);
           foreach my $reading (@polls) {
             my $value= OWDevice_ReadValue($hash,$reading);
-            if(defined($value)) {
-              readingsBulkUpdate($hash,$reading,$value);
-            } else {
-              $read_failed = 1;
-            }
+            readingsBulkUpdate($hash,$reading,$value) if(defined($value));
           }
-          if( !$read_failed ) {
-            if(@state) {
-              foreach my $reading (@state) {
-                my $value= ReadingsVal($hash->{NAME},$reading,undef);
-                if(defined($value)) {
-                  $state .= "$reading: $value  ";
-                } else {
-                  $state .= "$reading: n/a  ";
-                }
+          if(@state) {
+            foreach my $reading (@state) {
+              my $value= ReadingsVal($hash->{NAME},$reading,undef);
+              if(defined($value)) {
+                $state .= "$reading: $value  ";
+              } else {
+                $state .= "$reading: n/a  ";
               }
             }
-            if($alerting) {
-              my $dir= OWDevice_ReadFromServer($hash,"dir","/alarm/");
-              my $alarm= (defined($dir) && $dir =~ m/$address/) ? 1 :0;
-              readingsBulkUpdate($hash,"alarm",$alarm);
-              $state .= "alarm: $alarm";
-            }
-            if($interface eq "id") {
-              my $dir= OWDevice_ReadFromServer($hash,"dir","/");
-              my $present= (defined($dir) && $dir =~ m/$address/) ? 1 :0;
-              readingsBulkUpdate($hash,"present",$present);
-              $state .= "present: $present";
-              my $bus= OWDevice_ReadFromServer($hash,"find",$address);
-              my $location= (defined($bus)) ? $bus :"absent";
-              readingsBulkUpdate($hash,"location",$location);
-            }
-            $state =~ s/\s+$//;
-            readingsBulkUpdate($hash,"state",$state,0);
-          } else {
-            readingsBulkUpdate($hash,"state","read failed",0);
           }
+          if($alerting
+             && !$hash->{LAST_READ_FAILED}) {
+            my $dir= OWDevice_ReadFromServer($hash,"dir","/alarm/");
+            my $alarm= (defined($dir) && $dir =~ m/$address/) ? 1 :0;
+            readingsBulkUpdate($hash,"alarm",$alarm);
+            $state .= "alarm: $alarm";
+          }
+          if($interface eq "id"
+             && !$hash->{LAST_READ_FAILED}) {
+            my $dir= OWDevice_ReadFromServer($hash,"dir","/");
+            my $present= (defined($dir) && $dir =~ m/$address/) ? 1 :0;
+            readingsBulkUpdate($hash,"present",$present);
+            $state .= "present: $present";
+            my $bus= OWDevice_ReadFromServer($hash,"find",$address);
+            my $location= (defined($bus)) ? $bus :"absent";
+            readingsBulkUpdate($hash,"location",$location);
+          }
+          $state =~ s/\s+$//;
+          readingsBulkUpdate($hash,"state",$state,0);
           readingsEndUpdate($hash,1);
         }
         RemoveInternalTimer($hash);