remove unused version and protocol fields from JSON output; add error message for insufficient memory

Improves NFC Tag handling

html/rfid.js

@@ -640,8 +640,6 @@ function writeNfcTag() {
 
     // Erstelle das NFC-Datenpaket mit korrekten Datentypen
     const nfcData = {
-        version: "2.0",
-        protocol: "openspool",
         color_hex: selectedSpool.filament.color_hex || "FFFFFF",
         type: selectedSpool.filament.material,
         min_temp: minTemp,

html/spoolman.js

@@ -97,13 +97,15 @@ function populateVendorDropdown(data, selectedSmId = null) {
         ? (weightInKg / 1000).toFixed(2) + " t" 
         : weightInKg.toFixed(2) + " kg";
 
-    // Dropdown mit gefilterten Herstellern befüllen
-    Object.entries(filteredVendors).forEach(([id, name]) => {
-        const option = document.createElement("option");
-        option.value = id;
-        option.textContent = name;
-        vendorSelect.appendChild(option);
-    });
+    // Dropdown mit gefilterten Herstellern befüllen - alphabetisch sortiert
+    Object.entries(filteredVendors)
+        .sort(([, nameA], [, nameB]) => nameA.localeCompare(nameB)) // Sort vendors alphabetically by name
+        .forEach(([id, name]) => {
+            const option = document.createElement("option");
+            option.value = id;
+            option.textContent = name;
+            vendorSelect.appendChild(option);
+        });
 
     document.getElementById("totalSpools").textContent = totalSpools;
     document.getElementById("spoolsWithoutTag").textContent = spoolsWithoutTag;

src/nfc.cpp

@@ -44,8 +44,6 @@ void payloadToJson(uint8_t *data) {
       DeserializationError error = deserializeJson(doc, jsonString);
   
       if (!error) {
-        const char* version = doc["version"];
-        const char* protocol = doc["protocol"];
         const char* color_hex = doc["color_hex"];
         const char* type = doc["type"];
         int min_temp = doc["min_temp"];
@@ -55,8 +53,6 @@ void payloadToJson(uint8_t *data) {
         Serial.println();
         Serial.println("-----------------");
         Serial.println("JSON-Parsed Data:");
-        Serial.println(version);
-        Serial.println(protocol);
         Serial.println(color_hex);
         Serial.println(type);
         Serial.println(min_temp);
@@ -93,8 +89,16 @@ bool formatNdefTag() {
     return success;
   }
 
+uint16_t readTagSize()
+{
+  uint8_t buffer[4];
+  memset(buffer, 0, 4);
+  nfc.ntag2xx_ReadPage(3, buffer);
+  return buffer[2]*8;
+}
+
 uint8_t ntag2xx_WriteNDEF(const char *payload) {
-  uint8_t tagSize = 240; // 144 bytes is maximum for NTAG213
+  uint16_t tagSize = readTagSize();
   Serial.print("Tag Size: ");Serial.println(tagSize);
 
   uint8_t pageBuffer[4] = {0, 0, 0, 0};
@@ -136,6 +140,8 @@ uint8_t ntag2xx_WriteNDEF(const char *payload) {
   if (combinedData == NULL) 
   {
     Serial.println("Fehler: Nicht genug Speicher vorhanden.");
+    oledShowMessage("Tag too small");
+    vTaskDelay(2000 / portTICK_PERIOD_MS);
     return 0;
   }
 
@@ -369,46 +375,51 @@ void scanRfidTask(void * parameter) {
 
         if (uidLength == 7)
         {
-          uint8_t data[256];
-
-          // We probably have an NTAG2xx card (though it could be Ultralight as well)
-          Serial.println("Seems to be an NTAG2xx tag (7 byte UID)");
-          
-          for (uint8_t i = 0; i < 45; i++) {
-            /*
-            if (i < uidLength) {
-              uidString += String(uid[i], HEX);
-              if (i < uidLength - 1) {
-                  uidString += ":"; // Optional: Trennzeichen hinzufügen
-              }
-            }
-            */
-            if (!nfc.mifareclassic_ReadDataBlock(i, data + (i - 4) * 4)) 
-            {
-              break; // Stop if reading fails
-            }
-            // Check for NDEF message end
-            if (data[(i - 4) * 4] == 0xFE) 
-            {
-              break; // End of NDEF message
-            }
-
-            yield();
-            esp_task_wdt_reset();
-            vTaskDelay(pdMS_TO_TICKS(1));
-          }
-
-          if (!decodeNdefAndReturnJson(data)) 
+          uint16_t tagSize = readTagSize();
+          if(tagSize > 0)
           {
-            oledShowMessage("NFC-Tag unknown");
-            vTaskDelay(2000 / portTICK_PERIOD_MS);
+            // Create a buffer depending on the size of the tag
+            uint8_t* data = (uint8_t*)malloc(tagSize);
+            memset(data, 0, tagSize);
+
+            // We probably have an NTAG2xx card (though it could be Ultralight as well)
+            Serial.println("Seems to be an NTAG2xx tag (7 byte UID)");
+            
+            uint8_t numPages = readTagSize()/4;
+            for (uint8_t i = 4; i < 4+numPages; i++) {
+              if (!nfc.ntag2xx_ReadPage(i, data+(i-4) * 4))
+              {
+                break; // Stop if reading fails
+              }
+              // Check for NDEF message end
+              if (data[(i - 4) * 4] == 0xFE) 
+              {
+                break; // End of NDEF message
+              }
+
+              yield();
+              esp_task_wdt_reset();
+              vTaskDelay(pdMS_TO_TICKS(1));
+            }
+
+            if (!decodeNdefAndReturnJson(data)) 
+            {
+              oledShowMessage("NFC-Tag unknown");
+              vTaskDelay(2000 / portTICK_PERIOD_MS);
+              hasReadRfidTag = 2;
+            }
+            else 
+            {
+              hasReadRfidTag = 1;
+            }
+
+            free(data);
+          }
+          else
+          {
+            oledShowMessage("NFC-Tag read error");
             hasReadRfidTag = 2;
           }
-          else 
-          {
-            hasReadRfidTag = 1;
-          }
-         
         }
         else
         {