diff --git a/fhem/CHANGED b/fhem/CHANGED
index f6c00c71d..0e522bbc7 100644
--- a/fhem/CHANGED
+++ b/fhem/CHANGED
@@ -1,5 +1,6 @@
 # Add changes at the top of the list. Keep it in ASCII, and 80-char wide.
 # Do not insert empty lines here, update check depends on it.
+  - bugfix:  00_SIGNALduino: fixed ws7000 decoding
   - feature: 72_XiaomiDevice: predefined zones and points
   - bugfix:  88_xs1Bridge: blacklist PEARL Warning + Code mod
   - feature: 74_AMADDevice: add support to set and read Adaptive brightness
diff --git a/fhem/FHEM/00_SIGNALduino.pm b/fhem/FHEM/00_SIGNALduino.pm
index d6c5bf044..abc89e945 100644
--- a/fhem/FHEM/00_SIGNALduino.pm
+++ b/fhem/FHEM/00_SIGNALduino.pm
@@ -4441,7 +4441,7 @@ sub SIGNALduino_postDemo_WS2000($@) {
 		do {
 			$error += !$bit_msg[$index + $datastart];			# jedes 5. Bit muss 1 sein
 			$dataindex = $index + $datastart + 1;				 
-			$data = oct( "0b".(join "", reverse @bit_msg[$dataindex .. $dataindex + 3])) if ($dataindex <= $datalength);
+			$data = oct( "0b".(join "", reverse @bit_msg[$dataindex .. $dataindex + 3]));
 			if ($index == 5) {$adr = ($data & 0x07)}			# Sensoradresse
 			if ($datalength == 45 || $datalength == 46) { 	# Typ 1 ohne Summe
 				if ($index <= $datalength - 5) {
@@ -4454,7 +4454,7 @@ sub SIGNALduino_postDemo_WS2000($@) {
 				}
 			}
 			$index += 5;
-		} until ($index >= $datalength);
+		} until ($index >= $datalength -1 );
 	}
 	if ($error != 0) {
 		Log3 $name, 4, "$name: WS2000 Sensortyp $typ Adr $adr - ERROR examination bit";
@@ -4464,7 +4464,7 @@ sub SIGNALduino_postDemo_WS2000($@) {
 		return (0, undef);
 	} else {
 		if ($datalength < 45 || $datalength > 46) { 			# Summe prüfen, außer Typ 1 ohne Summe
-			$data = oct( "0b".(join "", reverse @bit_msg[$dataindex .. $dataindex + 3])) if ($dataindex <= $datalength);
+			$data = oct( "0b".(join "", reverse @bit_msg[$dataindex .. $dataindex + 3]));
 			if ($data != ($sum & 0x0F)) {
 				Log3 $name, 4, "$name: WS2000 Sensortyp $typ Adr $adr - ERROR sum";
 				return (0, undef);