diff --git a/FHEM/lib/SD_Protocols.pm b/FHEM/lib/SD_Protocols.pm
index 4fff937d2..548941ad2 100644
--- a/FHEM/lib/SD_Protocols.pm
+++ b/FHEM/lib/SD_Protocols.pm
@@ -6,8 +6,14 @@
 #
 # 2016-2019  S.Butzek, Ralf9
 # 2019-2021  S.Butzek, HomeAutoUser, elektron-bbs
+# 2022       S.Butzek, HomeAutoUser, elektron-bbs, uwekaditz
 #
 ################################################################################
+# 2.07 2022-08-14 uwekaditz
+# - CHG: mcBit2SomfyRTS() remove leading '0' in Somfy telegram that should start with '8' or 'F' if it is not expected
+# 2.07 2022-08-07 uwekaditz
+# - CHG: mcBit2SomfyRTS() remove leading '0' in Somfy telegram that should start with 'A' if it is not expected
+################################################################################
 package lib::SD_Protocols;
 
 use strict;
@@ -15,8 +21,9 @@ use warnings;
 use Carp qw(croak carp);
 use constant HAS_DigestCRC => defined eval { require Digest::CRC; };
 use constant HAS_JSON => defined eval { require JSON; };
+use List::Util qw/any/;
 
-our $VERSION = '2.06';
+our $VERSION = '2.07';
 use Storable qw(dclone);
 use Scalar::Util qw(blessed);
 
@@ -1084,10 +1091,18 @@ sub mcBit2SomfyRTS {
   my $mcbitnum  = shift // length $bitData;
 
   $self->_logging( qq[lib/mcBit2SomfyRTS, bitdata: $bitData ($mcbitnum)], 4 );
-
-  if ($mcbitnum == 57) {
-    $bitData = substr($bitData, 1, 56);
+ 
+  #$self->_logging( qq[lib/mcBit2SomfyRTS, first bit: ]. substr($bitData,0,1), 4 );
+  
+  # remove leading '0' in any Somfy telegram if it is not expected
+  if ($mcbitnum == 57 || ($mcbitnum == 81 && substr($bitData,0,1) eq '0'))  {
+    # length not correct, byt leading '0' -> remove leading '0'
+    $bitData = substr($bitData, 1, $mcbitnum - 1);
     $self->_logging( qq[lib/mcBit2SomfyRTS, bitdata: $bitData, truncated to length: ]. length($bitData), 4 );
+  } elsif ($mcbitnum == 80 && any { substr($bitData, 0, 5) eq $_ } qw(01010 01000 01111) ) {
+  # length correct but telegram does not start with character 'A', '8' or 'F' , remove leading '0' and add a '0' at the end, see https://forum.fhem.de/index.php/topic,72173.msg1075881.html#msg1075881
+    $bitData = substr($bitData, 1, $mcbitnum - 1) . q[0];
+    $self->_logging( qq[lib/mcBit2SomfyRTS, bitdata: $bitData, remove leading nibble, added last nibble - length: ]. length($bitData), 4 );
   }
   my $encData = lib::SD_Protocols::binStr2hexStr($bitData);
 
diff --git a/t/SD_Protocols/02_mcBit2SomfyRTS.t b/t/SD_Protocols/02_mcBit2SomfyRTS.t
index 4a6c4b818..210734fd1 100644
--- a/t/SD_Protocols/02_mcBit2SomfyRTS.t
+++ b/t/SD_Protocols/02_mcBit2SomfyRTS.t
@@ -6,8 +6,9 @@ use Test2::V0;
 use lib::SD_Protocols;
 use Test2::Tools::Compare qw{is};
 use Test2::Todo;
+use Carp qw(carp);
 
-plan(4);
+plan(6);
 
 my $id=5043;
 my ($rcode,$hexresult);
@@ -19,6 +20,20 @@ $Protocols->{_protocols}->{5043}{length_min} = 56;
 $Protocols->{_protocols}->{5043}{length_max} = 57;
 
 
+sub createCallback {
+
+	return sub  {
+		my $message = shift // carp "message must be provided";
+		my $level = shift // 0;
+		
+		print qq[ $level (/02_mcBit2SomfyRTS.t/ $message \n];
+	};
+};
+
+
+my $myLocalLogCallback =createCallback();
+$Protocols->registerLogCallback($myLocalLogCallback);
+
 my $target = undef;
 
 subtest 'mcbitnum != 57' => sub {
@@ -62,3 +77,21 @@ subtest 'message to long' => sub {
 };
 $todo->end;
 
+
+subtest 'message Button RC1 up truncate 81 to 80' => sub {
+	plan(2);
+	my $bitdata='010100000100000001000001100110100110010001100000101010101100010000000000000100010000';
+
+	($rcode,$hexresult)=$Protocols->mcBit2SomfyRTS($target,$bitdata,$id,81);
+	is($rcode,1,"check returncode for SomfyRTS transmission");
+	is($hexresult,'A0808334C8C155880022','check result SomfyRTS');
+};
+
+subtest 'message Button RC2 up - length 80' => sub {
+	plan(2);
+	my $bitdata='01010101010001001100010110000000000100101001011111011101110001000000000000010001';
+
+	($rcode,$hexresult)=$Protocols->mcBit2SomfyRTS($target,$bitdata,$id,80);
+	is($rcode,1,"check returncode for SomfyRTS transmission");
+	is($hexresult,'AA898B00252FBB880022','check result SomfyRTS');
+};