diff --git a/FHEM/21_OWAD.pm b/FHEM/21_OWAD.pm
index f8acd9bee..fdbbb7741 100644
--- a/FHEM/21_OWAD.pm
+++ b/FHEM/21_OWAD.pm
@@ -76,7 +76,7 @@ use strict;
 use warnings;
 sub Log($$);
 
-my $owx_version="5.11";
+my $owx_version="5.12";
 #-- fixed raw channel name, flexible channel name
 my @owg_fixed   = ("A","B","C","D");
 my @owg_channel = ("A","B","C","D");
@@ -555,7 +555,12 @@ sub OWAD_Get($@) {
   if($a[1] eq "present") {
     #-- hash of the busmaster
     my $master       = $hash->{IODev};
-    $value           = OWX_Verify($master,$owx_dev);
+    #-- asynchronous mode
+    if( $hash->{ASYNC} ){
+      $value = OWX_ASYNC_Verify($master,$hash->{ROM_ID});
+    } else {
+      $value = OWX_Verify($master,$hash->{ROM_ID});
+    }
     $hash->{PRESENT} = $value;
     return "$name.present => $value";
   } 
diff --git a/FHEM/21_OWID.pm b/FHEM/21_OWID.pm
index 4f4cc3eb3..f98ab2d3b 100644
--- a/FHEM/21_OWID.pm
+++ b/FHEM/21_OWID.pm
@@ -299,7 +299,12 @@ sub OWID_Get($@) {
   if($a[1] eq "present") {
     #-- hash of the busmaster
     my $master       = $hash->{IODev};
-    $value           = OWX_Verify($master,$hash->{ROM_ID});
+    #-- asynchronous mode
+    if( $hash->{ASYNC} ){
+      $value = OWX_ASYNC_Verify($master,$hash->{ROM_ID});
+    } else {
+      $value = OWX_Verify($master,$hash->{ROM_ID});
+    }
     if( $value == 0 ){
       readingsSingleUpdate($hash,"present",0,$hash->{PRESENT}); 
     } else {
diff --git a/FHEM/21_OWMULTI.pm b/FHEM/21_OWMULTI.pm
index eab1d834a..a31a9fc70 100644
--- a/FHEM/21_OWMULTI.pm
+++ b/FHEM/21_OWMULTI.pm
@@ -442,10 +442,15 @@ sub OWMULTI_Get($@) {
   #-- get present
   if($a[1] eq "present" ) {
     #-- OWX interface
-    if( $interface eq "OWX" ){
+    if( $interface =~ /^OWX/ ){
       #-- hash of the busmaster
       my $master       = $hash->{IODev};
-      $value           = OWX_Verify($master,$hash->{ROM_ID});
+      #-- asynchronous mode
+      if( $hash->{ASYNC} ){
+        $value = OWX_ASYNC_Verify($master,$hash->{ROM_ID});
+      } else {
+        $value = OWX_Verify($master,$hash->{ROM_ID});
+      }
       $hash->{PRESENT} = $value;
       return "$name.present => $value";
     } else {
diff --git a/FHEM/21_OWSWITCH.pm b/FHEM/21_OWSWITCH.pm
index 5f1d0f811..e19451c13 100644
--- a/FHEM/21_OWSWITCH.pm
+++ b/FHEM/21_OWSWITCH.pm
@@ -450,7 +450,12 @@ sub OWSWITCH_Get($@) {
   if($a[1] eq "present") {
     #-- hash of the busmaster
     my $master       = $hash->{IODev};
-    $value           = OWX_Verify($master,$hash->{ROM_ID});
+    #-- asynchronous mode
+    if( $hash->{ASYNC} ){
+      $value = OWX_ASYNC_Verify($master,$hash->{ROM_ID});
+    } else {
+      $value = OWX_Verify($master,$hash->{ROM_ID});
+    }
     $hash->{PRESENT} = $value;
     return "$name.present => $value";
   } 
diff --git a/FHEM/21_OWTHERM.pm b/FHEM/21_OWTHERM.pm
index c42077baa..b228e23f0 100755
--- a/FHEM/21_OWTHERM.pm
+++ b/FHEM/21_OWTHERM.pm
@@ -424,7 +424,12 @@ sub OWTHERM_Get($@) {
     if( $interface =~ /^OWX/ ){
       #-- hash of the busmaster
       my $master       = $hash->{IODev};
-      $value           = OWX_Verify($master,$hash->{ROM_ID});
+      #-- asynchronous mode
+      if( $hash->{ASYNC} ){
+        $value = OWX_ASYNC_Verify($master,$hash->{ROM_ID});
+      } else {
+        $value = OWX_Verify($master,$hash->{ROM_ID});
+      }
       $hash->{PRESENT} = $value;
       return "$name.present => $value";
     } else {