diff --git a/FHEM/14_BresserTemeo.pm b/FHEM/14_BresserTemeo.pm
index 16b81fca6..dc31b440c 100644
--- a/FHEM/14_BresserTemeo.pm
+++ b/FHEM/14_BresserTemeo.pm
@@ -56,7 +56,7 @@ BresserTemeo_Define($$)
   $hash->{STATE} = "Defined";
 
   #AssignIoPort($hash);
-  return undef;
+  return ;
 }
 
 #####################################
@@ -65,7 +65,7 @@ BresserTemeo_Undef($$)
 {
   my ($hash, $name) = @_;
   delete($modules{BresserTemeo}{defptr}{$hash->{CODE}}) if($hash && $hash->{CODE});
-  return undef;
+  return ;
 }
 
 
@@ -240,7 +240,7 @@ BresserTemeo_Attr(@)
   my $cde = $hash->{CODE};
   delete($modules{BresserTemeo}{defptr}{$cde});
   $modules{BresserTemeo}{defptr}{$iohash->{NAME} . "." . $cde} = $hash;
-  return undef;
+  return ;
 }
 
 
diff --git a/FHEM/14_SD_RSL.pm b/FHEM/14_SD_RSL.pm
index 1af4f1322..6056bb9bd 100644
--- a/FHEM/14_SD_RSL.pm
+++ b/FHEM/14_SD_RSL.pm
@@ -112,7 +112,7 @@ sub SD_RSL_Define($$) {
 	
   AssignIoPort($hash, $iodevice);
 
-  return undef;
+  return ;
 }
 
 ##########################################################
@@ -135,7 +135,7 @@ sub SD_RSL_Set($@) {
 		return SetExtensions($hash, $cmdList, $name, @a)
 	}
 	
-	return undef;
+	return ;
 }
 
 ###################################################################
@@ -239,7 +239,7 @@ sub SD_RSL_Undef($$) {
   my ($hash, $name) = @_;
   SetExtensionsCancel($hash);
   delete($modules{SD_RSL}{defptr}{$hash->{DEF}}) if($hash && $hash->{DEF});
-  return undef;
+  return ;
 }
 
 ########################################################
@@ -254,7 +254,7 @@ sub SD_RSL_Attr(@) {
   my $cde = $hash->{DEF};
   delete($modules{SD_RSL}{defptr}{$cde});
   $modules{SD_RSL}{defptr}{$iohash->{NAME} . "." . $cde} = $hash;
-  return undef;
+  return ;
 }
 
 1;
diff --git a/FHEM/14_SD_WS.pm b/FHEM/14_SD_WS.pm
index 4977a3dda..33b3769d8 100644
--- a/FHEM/14_SD_WS.pm
+++ b/FHEM/14_SD_WS.pm
@@ -1,4 +1,4 @@
-# $Id: 14_SD_WS.pm 21666 2021-08-08 12:01:00Z elektron-bbs $
+# $Id: 14_SD_WS.pm 21666 2021-08-10 19:51:16Z sidey79 $
 #
 # The purpose of this module is to support serval
 # weather sensors which use various protocol
@@ -106,17 +106,17 @@ sub SD_WS_Define($$)
   $modules{SD_WS}{defptr}{$a[2]} = $hash;
   $hash->{STATE} = "Defined";
 
-  my $name= $hash->{NAME};
-  return undef;
+	my $name= $hash->{NAME};
+	return ;
 }
 
 #############################
 sub SD_WS_Undef($$)
 {
-  my ($hash, $name) = @_;
-  delete($modules{SD_WS}{defptr}{$hash->{CODE}})
-  if(defined($hash->{CODE}) && defined($modules{SD_WS}{defptr}{$hash->{CODE}}));
-  return undef;
+	my ($hash, $name) = @_;
+	delete($modules{SD_WS}{defptr}{$hash->{CODE}})
+	if(defined($hash->{CODE}) && defined($modules{SD_WS}{defptr}{$hash->{CODE}}));
+	return ;
 }
 
 #############################
diff --git a/FHEM/14_SD_WS09.pm b/FHEM/14_SD_WS09.pm
index b2d8ffe80..908b16e17 100644
--- a/FHEM/14_SD_WS09.pm
+++ b/FHEM/14_SD_WS09.pm
@@ -1,5 +1,5 @@
 ##############################################
-# $Id: 14_SD_WS09.pm 21622 2020-04-07 21:42:13Z Sidey $
+# $Id: 14_SD_WS09.pm 21622 2021-08-10 19:51:16Z sidey79 $
 # 
 # The purpose of this module is to support serval 
 # weather sensors like WS-0101  (Sender 868MHz ASK   Epmfänger RX868SH-DV elv)
@@ -65,7 +65,7 @@ sub SD_WS09_Define($$) {
 	$hash->{MODEL} = $model;
 
 	my $name= $hash->{NAME};
-	return undef;
+	return ;
 }
 
 #####################################
@@ -75,7 +75,7 @@ sub SD_WS09_Undef($$) {
 	delete($modules{SD_WS09}{defptr}{$hash->{CODE}})
 		if(defined($hash->{CODE}) &&
 			defined($modules{SD_WS09}{defptr}{$hash->{CODE}}));
-	return undef;
+	return ;
 }
 
 ###################################
@@ -151,7 +151,7 @@ sub SD_WS09_Parse($$) {
 
 		if ($syncpos ==-1 || length($bitData)-$syncpos < $minL2) {
 			Log3 $iohash, 4, "$name: SD_WS09_Parse EXIT: msg=$rawData syncp=$syncpos length:".length($bitData) ;
-			return undef;
+			return ;
 		}
 	}
 
@@ -285,7 +285,7 @@ sub SD_WS09_Parse($$) {
 		} else {
 			Log3 $iohash, 4, "$name: SD_WS09_Parse_Ex Exit: msg=$rawData length:".length($sensdata) ;
 			Log3 $iohash, 4, "$name: SD_WS09_WH10 Exit:  Model=$model " ;
-			return undef;
+			return ;
 		}
 	} else {
 		# es wird eine CTW600 angenommen 
@@ -317,7 +317,7 @@ sub SD_WS09_Parse($$) {
 			Log3 $iohash, 4, "$name: SD_WS09_Parse_17 ".$model." Rain bit: ".substr($sensdata,46,16)." Dec: " . $rain ;           
 		} else {
 			Log3 $iohash, 4, "$name: SD_WS09_Parse_18 CTW600 EXIT: msg=$bitData length:".length($bitData) ;
-			return undef;
+			return ;
 		}
 	}
 
@@ -326,11 +326,11 @@ sub SD_WS09_Parse($$) {
 
 	if($hum > 100 || $hum < 0) {
 		Log3 $iohash, 4, "$name: SD_WS09_Parse HUM: hum=$hum msg=$rawData " ;
-		return undef;
+		return ;
 	} 
 	if($temp > 60 || $temp < -40) {
 		Log3 $iohash, 4, "$name: SD_WS09_Parse TEMP: Temp=$temp msg=$rawData " ;
-		return undef;
+		return ;
 	} 
 
 	my $longids = AttrVal($iohash->{NAME},'longids',0);
@@ -357,7 +357,7 @@ sub SD_WS09_Parse($$) {
 		my $minsecs = AttrVal($iohash->{NAME},'minsecs',0);
 		if($hash->{lastReceive} && (time() - $hash->{lastReceive} < $minsecs)) {
 			Log3 $hash, 4, "SD_WS09_Parse_End $deviceCode Dropped due to short time. minsecs=$minsecs";
-			return undef;
+			return ;
 		}
 	}
 
@@ -484,7 +484,7 @@ sub SD_WS09_Attr(@) {
 	my $cde = $hash->{CODE};
 	delete($modules{SD_WS09}{defptr}{$cde});
 	$modules{SD_WS09}{defptr}{$iohash->{NAME} . "." . $cde} = $hash;
-	return undef;
+	return ;
 }
 
 ###################################
diff --git a/FHEM/41_OREGON.pm b/FHEM/41_OREGON.pm
index b7f383a91..3788146af 100644
--- a/FHEM/41_OREGON.pm
+++ b/FHEM/41_OREGON.pm
@@ -1,5 +1,5 @@
 #################################################################################
-# $Id: 41_OREGON.pm 34476 2017-12-26 13:23:00Z dev $
+# $Id: 41_OREGON.pm 34476 2021-08-10 19:51:16Z sidey79 $
 #
 # Module for FHEM to decode Oregon sensor messages
 #
@@ -80,7 +80,7 @@ OREGON_Define($$)
   $modules{OREGON}{defptr}{$code} = $hash;
   AssignIoPort($hash);
 
-  return undef;
+  return ;
 }
 
 #####################################
@@ -89,7 +89,7 @@ OREGON_Undef($$)
 {
   my ($hash, $name) = @_;
   delete($modules{OREGON}{defptr}{$name});
-  return undef;
+  return ;
 }
 
 
diff --git a/controls_signalduino.txt b/controls_signalduino.txt
index 4f891147e..4111ab808 100644
--- a/controls_signalduino.txt
+++ b/controls_signalduino.txt
@@ -1,18 +1,18 @@
 UPD 2021-08-08_19:14:43 228763 FHEM/00_SIGNALduino.pm
 UPD 2020-06-15_17:41:39 17876  FHEM/10_FS10.pm
 UPD 2020-05-26_11:51:12 20465  FHEM/10_SD_GT.pm
-UPD 2016-09-18_21:22:06 10111  FHEM/14_BresserTemeo.pm
+UPD 2021-06-07_23:00:23 10096  FHEM/14_BresserTemeo.pm
 UPD 2020-08-17_22:17:34 13964  FHEM/14_FLAMINGO.pm
 UPD 2020-04-13_23:15:56 19347  FHEM/14_Hideki.pm
 UPD 2020-10-03_11:48:15 11170  FHEM/14_SD_AS.pm
 UPD 2021-07-13_20:29:34 29223  FHEM/14_SD_BELL.pm
-UPD 2019-11-16_19:42:18 12593  FHEM/14_SD_RSL.pm
+UPD 2021-06-07_23:00:23 12573  FHEM/14_SD_RSL.pm
 UPD 2021-08-08_19:14:43 167137 FHEM/14_SD_UT.pm
-UPD 2021-08-08_16:21:32 95207  FHEM/14_SD_WS.pm
+UPD 2021-08-08_20:04:14 95186  FHEM/14_SD_WS.pm
 UPD 2020-04-13_23:15:56 18426  FHEM/14_SD_WS07.pm
-UPD 2020-04-15_23:37:36 35356  FHEM/14_SD_WS09.pm
+UPD 2021-08-08_20:04:14 35313  FHEM/14_SD_WS09.pm
 UPD 2020-04-13_23:15:56 14325  FHEM/14_SD_WS_Maverick.pm
-UPD 2018-07-04_21:56:16 37910  FHEM/41_OREGON.pm
+UPD 2021-08-08_20:04:14 37904  FHEM/41_OREGON.pm
 UPD 2020-12-17_23:16:30 15582  FHEM/90_SIGNALduino_un.pm
 UPD 2021-08-08_19:14:43 217540 FHEM/lib/SD_ProtocolData.pm
 UPD 2021-06-02_05:49:05 71700  FHEM/lib/SD_Protocols.pm