diff --git a/Energy_Pie/module.html b/Energy_Pie/module.html
index fd5c82e..4e1952c 100644
--- a/Energy_Pie/module.html
+++ b/Energy_Pie/module.html
@@ -25,6 +25,7 @@
   <div style="margin-top:10px;display:flex;flex-direction:column;gap:8px;max-width:520px;">
     <div style="font-weight:600;">Werte</div>
     <div id="values" style="display:flex;flex-direction:column;gap:6px;"></div>
+    <div id="debug" style="margin-top:8px;font-size:12px;opacity:0.65;"></div>
   </div>
 </div>
 
@@ -36,6 +37,7 @@
   const elNext   = document.getElementById('next');
   const elValues = document.getElementById('values');
   const elPeriod = document.getElementById('period');
+  const elDebug = document.getElementById('debug');
 
   // Range ändern -> sofort rechnen
   elRange.addEventListener('change', () => requestAction('SetRange', elRange.value));
@@ -81,6 +83,15 @@
     } else {
       renderValues({});
     }
+
+if (data.debug) {
+  const p = data.debug.prod, f = data.debug.feed, g = data.debug.grid;
+  elDebug.textContent =
+        `Logs: Prod(count=${p?.count ?? 0}) Feed(count=${f?.count ?? 0}) Grid(count=${g?.count ?? 0})`;
+    } else {
+    elDebug.textContent = '';
+    }
+
   }
 
   // Nur diese vier Werte anzeigen (fixe Reihenfolge)
diff --git a/Energy_Pie/module.php b/Energy_Pie/module.php
index 410f306..ca74b0b 100644
--- a/Energy_Pie/module.php
+++ b/Energy_Pie/module.php
@@ -121,6 +121,11 @@ private function RecalculateAndPush(): void
             'Einspeisung'  => (float)$feed,
             'Netz'         => (float)$grid,
             'Hausverbrauch'=> (float)$house
+        ],
+        'debug' => [
+            'prod' => $dbgProd,
+            'feed' => $dbgFeed,
+            'grid' => $dbgGrid
         ]
     ];
 
@@ -174,17 +179,21 @@ private function RecalculateAndPush(): void
     }
 
 
-     private function readDelta($varId, $tStart, $tEnd)
+    private function readDelta(int $varId, int $tStart, int $tEnd, ?array &$dbg = null): float
     {
-        if (!is_int($tStart)) {
-            $tStart = strtotime($tStart);
-        }
-        if (!is_int($tEnd)) {
-            $tEnd = strtotime($tEnd);
+        $dbg = [
+            'varId' => $varId,
+            'count' => 0,
+            'vStart' => null,
+            'vEnd' => null
+        ];
+
+        if ($varId <= 0 || !IPS_VariableExists($varId)) {
+            return 0.0;
         }
 
-        $archiveID = @IPS_GetInstanceListByModuleID('{43192F0B-135B-4CE7-A0A7-1475603F3060}')[0];
-        if (!$archiveID || !IPS_VariableExists($varId)) {
+        $archiveID = IPS_GetInstanceListByModuleID('{43192F0B-135B-4CE7-A0A7-1475603F3060}')[0] ?? 0;
+        if ($archiveID <= 0) {
             return 0.0;
         }
 
@@ -193,32 +202,40 @@ private function RecalculateAndPush(): void
             return 0.0;
         }
 
-        usort($values, fn($a, $b) => (int)$a['TimeStamp'] <=> (int)$b['TimeStamp']);
+        usort($values, static fn($a, $b) => (int)$a['TimeStamp'] <=> (int)$b['TimeStamp']);
+        $dbg['count'] = count($values);
+
+        // Fallback: erster/letzter Eintrag im Fenster
+        $first = (float)$values[0]['Value'];
+        $last  = (float)$values[count($values)-1]['Value'];
+
         $vStart = null;
         $vEnd   = null;
 
         foreach ($values as $v) {
-            if ($v['TimeStamp'] <= $tStart) {
-                $vStart = $v['Value'];
+            $ts = (int)$v['TimeStamp'];
+            if ($ts <= $tStart) {
+                $vStart = (float)$v['Value'];
             }
-            if ($v['TimeStamp'] <= $tEnd) {
-                $vEnd = $v['Value'];
+            if ($ts <= $tEnd) {
+                $vEnd = (float)$v['Value'];
             }
-            if ($v['TimeStamp'] > $tEnd) {
+            if ($ts > $tEnd) {
                 break;
             }
         }
 
-        if ($vStart === null) {
-            $vStart = (float)GetValue($varId);
-        }
-        if ($vEnd === null) {
-            $vEnd = (float)GetValue($varId);
-        }
+        // Wenn kein Wert vor Start/Ende gefunden wurde -> nimm ersten/letzten Logwert
+        if ($vStart === null) $vStart = $first;
+        if ($vEnd === null)   $vEnd   = $last;
+
+        $dbg['vStart'] = $vStart;
+        $dbg['vEnd']   = $vEnd;
 
         $diff = $vEnd - $vStart;
-        return ($diff < 0) ? 0.0 : $diff;
+        return ($diff < 0) ? 0.0 : (float)$diff;
     }
+
     /**
      * Buttons for quick navigation.
      */
@@ -271,11 +288,7 @@ private function RecalculateAndPush(): void
         return checkdate($m, $d, $y);
     }
 
-    // Optional helper for the "actions" test button in form.json
-    public function TestPush(): void
-    {
-        $this->RecalculateAndPush();
-    }
+
 }
 
 ?>
\ No newline at end of file