Add meta feed functionality and enhance error handling in catalog API

assets/readdevice.js

@@ -1,7 +1,7 @@
 var port, textEncoder, writableStreamClosed, writer, historyIndex = -1;
 const lineHistory = [];
-maintenanceRun = 0;
-handshakeComplete = false;
+let maintenanceRun = 0;
+let handshakeComplete = false;
 
 // Function to log communication to API
 async function logCommunication(data, direction) {
@@ -102,6 +102,7 @@ async function connectSerial() {
         // Log connection failure details
         await logCommunication(`Serial connection failed: ${error.message || 'Unknown error'}`, 'disconnected');
         alert("Serial Connection Failed");
+        window.location.reload();
     }
 }
 
@@ -580,7 +581,7 @@ async function closePort(){
 
         maintenanceRun = 0; // reset maintenanceRun
         // Refresh the page
-        window.location.reload();
+        setTimeout(() => {window.location.reload();}, 500);
 }
 
 async function closePortCarTest(){
@@ -736,7 +737,7 @@ async function updateHistory(){
             body: testdetails
         });
         
-        const historyresult = await response.json;
+        const historyresult = await response.json();
     
     setTimeout(maintenanceTest,5000);
     
@@ -805,5 +806,6 @@ async function updateHistory(){
             catch(e)
         {
             alert(e.message || e);
+            window.location.reload();
     }
 }