diff --git a/CHANGED b/CHANGED
index c14cc6e..1071ca4 100644
--- a/CHANGED
+++ b/CHANGED
@@ -1,3 +1,4 @@
+2026-04-30 - Fix SIGNALduino protocol loader
 2026-04-28 - Support schema-wrapped protocol JSON
 2026-04-28 - Bugfix link "check it" (#160)
 
diff --git a/FHEM/88_SIGNALduino_TOOL.pm b/FHEM/88_SIGNALduino_TOOL.pm
index f52ea58..eddd404 100644
--- a/FHEM/88_SIGNALduino_TOOL.pm
+++ b/FHEM/88_SIGNALduino_TOOL.pm
@@ -1177,12 +1177,19 @@ sub SIGNALduino_TOOL_Get {
   ## create one list in csv format to import in other program ##
   if ($cmd eq 'TimingsList') {
     Log3 $name, 4, "$name: Get $cmd - check (1)";
-    my %ProtocolListSIGNALduino = SIGNALduino_LoadProtocolHash("$attr{global}{modpath}/lib/FHEM/Devices/SIGNALduino/SD_Protocols/Data.pm");
-    if (exists($ProtocolListSIGNALduino{error})  ) {
-      Log3 "SIGNALduino", 1, "Error loading Protocol Hash. Module is in inoperable mode error message:($ProtocolListSIGNALduino{error})";
-      delete($ProtocolListSIGNALduino{error});
+    my $protocolObject = FHEM::Devices::SIGNALduino::SD_Protocols->new();
+    my $protocolFile = "$attr{global}{modpath}/lib/FHEM/Devices/SIGNALduino/SD_Protocols/Data.pm";
+    my $protocolLoadError = $protocolObject->LoadHash($protocolFile);
+    if (defined $protocolLoadError && $protocolLoadError ne '') {
+      Log3 "SIGNALduino", 1, "Error loading Protocol Hash. Module is in inoperable mode error message:($protocolLoadError)";
       return;
     }
+    my $protocolList = $protocolObject->getProtocolList();
+    if (!defined $protocolList || ref($protocolList) ne 'HASH') {
+      Log3 "SIGNALduino", 1, "Error loading Protocol Hash. Module is in inoperable mode error message:(protocol list is not available)";
+      return;
+    }
+    my %ProtocolListSIGNALduino = %{$protocolList};
 
     my $file = 'timings.txt';
     my @value;                                                                           # for values from hash_list
@@ -1197,7 +1204,11 @@ sub SIGNALduino_TOOL_Get {
       ### max Werte von value_name array ###
       for my $i (0..scalar(@value_name)-1) {
         if (not exists $value_max[$i]) { $value_max[$i] = 0; }
-        if (exists $ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]} && scalar(@{$ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]}}) > $value_max[$i]) { $value_max[$i] = scalar(@{$ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]}}); }
+        if (exists $ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]} && defined $ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]}) {
+          my $timing_value = $ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]};
+          my $timing_value_count = ref($timing_value) eq 'ARRAY' ? scalar(@{$timing_value}) : 1;
+          if ($timing_value_count > $value_max[$i]) { $value_max[$i] = $timing_value_count; }
+        }
       }
     }
 
@@ -1222,9 +1233,12 @@ sub SIGNALduino_TOOL_Get {
         }
         ### ENDE ###
 
-        foreach my $e(@{$ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]}}) {
-          $value[$valuecount] = $e;
-          $valuecount++;
+        if (exists $ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]} && defined $ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]}) {
+          my $timing_value = $ProtocolListSIGNALduino{$timings_protocol}{$value_name[$i]};
+          foreach my $e (ref($timing_value) eq 'ARRAY' ? @{$timing_value} : ($timing_value)) {
+            $value[$valuecount] = $e;
+            $valuecount++;
+          }
         }
 
         if ($i == 0) {
diff --git a/controls_SD_TOOL.txt b/controls_SD_TOOL.txt
index 4f2b99e..c04b5b0 100644
--- a/controls_SD_TOOL.txt
+++ b/controls_SD_TOOL.txt
@@ -1,2 +1,2 @@
-UPD 2026-04-28_23:20:13 285940 FHEM/88_SIGNALduino_TOOL.pm
+UPD 2026-04-30_20:18:18 286778 FHEM/88_SIGNALduino_TOOL.pm
 UPD 2026-04-27_22:55:13 362979 FHEM/lib/SD_Device_ProtocolList.json
diff --git a/t/FHEM/88_SIGNALduino_TOOL/10_load.t b/t/FHEM/88_SIGNALduino_TOOL/10_load.t
index e2681bf..a571fd0 100644
--- a/t/FHEM/88_SIGNALduino_TOOL/10_load.t
+++ b/t/FHEM/88_SIGNALduino_TOOL/10_load.t
@@ -3,6 +3,8 @@ package main;
 use strict;
 use warnings;
 
+use File::Spec;
+use File::Temp qw(tempdir);
 use Test2::V1 qw(-ipP);
 
 my $tool_name = 'SIGNALduino_TOOL';
@@ -23,6 +25,33 @@ ok(!FhemTestUtils_gotLog('Unknown module SIGNALduino_TOOL'), 'No unknown-module
 ok(!FhemTestUtils_gotLog('SIGNALduino_TOOL:.*ERROR'), 'No SIGNALduino_TOOL error was logged during startup');
 ok(!FhemTestUtils_gotLog('Cannot load module SIGNALduino_TOOL'), 'FHEM loaded the module successfully');
 
+my $timings_dir = tempdir(CLEANUP => 1);
+CommandAttr(undef, "$tool_name Path $timings_dir/");
+
+my $timings_result = eval { CommandGet(undef, "$tool_name TimingsList") };
+my $timings_error = $@;
+
+is($timings_error, '', 'TimingsList get command did not die');
+like(
+  $timings_result,
+  qr/New TimingsList \(timings\.txt\) are created!/,
+  'TimingsList get command reports success'
+);
+is(ReadingsVal($tool_name, 'state', undef), 'TimingsList created', 'TimingsList updates the state reading');
+
+my $timings_file = File::Spec->catfile($timings_dir, 'timings.txt');
+ok(-e $timings_file, 'TimingsList created timings.txt');
+
+my $timings_content = do {
+  open my $fh, '<', $timings_file or die "Unable to open $timings_file: $!";
+  local $/;
+  <$fh>;
+};
+
+like($timings_content, qr/^id;typ;clockabs;/, 'TimingsList writes a CSV header');
+like($timings_content, qr/(?:^|;)2DD4(?:;|\n)/m, 'TimingsList writes scalar sync values');
+ok(!FhemTestUtils_gotLog(q[Can't use string .* as an ARRAY ref]), 'TimingsList did not log scalar-as-array errors');
+
 done_testing;
 exit(0);
 
diff --git a/t/load_protocol_package.t b/t/load_protocol_package.t
index 7089e05..b41e045 100644
--- a/t/load_protocol_package.t
+++ b/t/load_protocol_package.t
@@ -39,5 +39,6 @@ my $module_source = do {
 
 like($module_source, qr/use FHEM::Devices::SIGNALduino::SD_Protocols;/, 'Module uses the new protocol package');
 like($module_source, qr{lib/FHEM/Devices/SIGNALduino/SD_Protocols/Data\.pm}, 'Module references the new protocol data path');
+unlike($module_source, qr/SIGNALduino_LoadProtocolHash/, 'Module no longer calls the removed protocol loader');
 
 done_testing;