docs: update changelog and header for version v2.0.0-beta1

- Removed unused function for getting current date in ISO8601 format.
- Updated JSON key names in filament and spool creation to use shorter identifiers.
- Enhanced NFC interface reset procedure with detailed logging and retry mechanisms.
- Improved stability checks after write operations to ensure NFC interface readiness.
- Added comprehensive error handling and diagnostics for NFC read/write operations.
- Streamlined the quick spool ID check to optimize performance and reliability.

CHANGELOG.md

@@ -1,5 +1,53 @@
 # Changelog
 
+## [2.0.0-beta1] - 2025-08-29
+### Changed
+- update platformio.ini for beta version v2.0.0-beta1
+- update version to 2.0.0 in platformio.ini
+
+
+## [1.5.12-beta18] - 2025-08-29
+### Added
+- add display delay for vendor, filament, and spool creation processes
+
+### Changed
+- update platformio.ini for beta version v1.5.12-beta18
+
+### Fixed
+- replace progress bar with message display for remaining weight in sendToApi function
+
+
+## [1.5.12-beta17] - 2025-08-29
+### Added
+- add progress bar updates for vendor and filament creation processes
+
+### Changed
+- update platformio.ini for beta version v1.5.12-beta17
+- optimize page limit detection and remove redundant verification code
+
+### Fixed
+- update vendor check to use shorthand key in payload
+
+
+## [1.5.12-beta16] - 2025-08-29
+### Changed
+- update platformio.ini for beta version v1.5.12-beta16
+- Refactor NFC interface handling and improve error diagnostics
+
+
+## [1.5.12-beta15] - 2025-08-29
+### Changed
+- update platformio.ini for beta version v1.5.12-beta15
+- enhance NFC write operation diagnostics and improve error handling
+- enhance NFC write operation handling and prevent tag operations during write
+
+
+## [1.5.12-beta14] - 2025-08-29
+### Changed
+- update platformio.ini for beta version v1.5.12-beta14
+- optimize JSON payload structure and enhance NFC tag validation process
+
+
 ## [1.5.12-beta13] - 2025-08-29
 ### Changed
 - update platformio.ini for beta version v1.5.12-beta13

platformio.ini

@@ -9,8 +9,8 @@
 ; https://docs.platformio.org/page/projectconf.html
 
 [common]
-version = "1.5.12-beta13"
-to_old_version = "1.5.0"
+version = "2.0.0-beta1"
+to_old_version = "2.0.0"
 
 ##
 [env:esp32dev]

src/api.cpp

@@ -9,18 +9,6 @@
 #include <time.h>
 volatile spoolmanApiStateType spoolmanApiState = API_IDLE;
 
-// Returns current date and time in ISO8601 format
-String getCurrentDateISO8601() {
-    struct tm timeinfo;
-    if(!getLocalTime(&timeinfo)) {
-        Serial.println("Failed to obtain time");
-        return "1970-01-01T00:00:00Z";
-    }
-    char timeStringBuff[25];
-    strftime(timeStringBuff, sizeof(timeStringBuff), "%Y-%m-%dT%H:%M:%SZ", &timeinfo);
-    return String(timeStringBuff);
-}
-
 //bool spoolman_connected = false;
 String spoolmanUrl = "";
 bool octoEnabled = false;
@@ -170,7 +158,8 @@ void sendToApi(void *parameter) {
                 //oledShowMessage("Remaining: " + String(remaining_weight) + "g");
                 if(!octoEnabled){
                     // TBD: Do not use Strings...
-                    oledShowProgressBar(1, 1, "Spool Tag", ("Done: " + String(remainingWeight) + " g remain").c_str());
+                    //oledShowProgressBar(1, 1, "Spool Tag", ("Done: " + String(remainingWeight) + " g remain").c_str());
+                    oledShowMessage("Remaining: " + String(remainingWeight) + "g");
                     remainingWeight = 0;
                 }else{
                     // ocoto is enabled, trigger octo update
@@ -185,7 +174,8 @@ void sendToApi(void *parameter) {
                 break;
             case API_REQUEST_OCTO_SPOOL_UPDATE:
                 // TBD: Do not use Strings...
-                oledShowProgressBar(5, 5, "Spool Tag", ("Done: " + String(remainingWeight) + " g remain").c_str());
+                //oledShowProgressBar(5, 5, "Spool Tag", ("Done: " + String(remainingWeight) + " g remain").c_str());
+                oledShowMessage("Remaining: " + String(remainingWeight) + "g");
                 remainingWeight = 0;
                 break;
             case API_REQUEST_VENDOR_CREATE:
@@ -614,6 +604,8 @@ bool updateSpoolBambuData(String payload) {
 
 // #### Brand Filament
 uint16_t createVendor(String vendor) {
+    oledShowProgressBar(2, 5, "New Brand", "Create new Vendor");
+
     // Create new vendor in Spoolman database using task system
     // Note: Due to async nature, the ID will be stored in createdVendorId global variable
     // Note: This function assumes that the caller has already ensured API is IDLE
@@ -627,7 +619,6 @@ uint16_t createVendor(String vendor) {
     JsonDocument vendorDoc;
     vendorDoc["name"] = vendor;
     vendorDoc["comment"] = "automatically generated";
-    vendorDoc["empty_spool_weight"] = 180;
     vendorDoc["external_id"] = vendor;
 
     String vendorPayload;
@@ -665,6 +656,9 @@ uint16_t createVendor(String vendor) {
 
     vendorDoc.clear();
     
+    // Delay for Display Bar
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+
     // Wait for task completion and return the created vendor ID
     // Note: createdVendorId will be set by sendToApi when response is received
     while(createdVendorId == 65535) {
@@ -675,6 +669,8 @@ uint16_t createVendor(String vendor) {
 }
 
 uint16_t checkVendor(String vendor) {
+    oledShowProgressBar(1, 5, "New Brand", "Check Vendor");
+
     // Check if vendor exists using task system
     foundVendorId = 65535; // Reset to invalid value to detect when API response is received
     
@@ -737,6 +733,8 @@ uint16_t checkVendor(String vendor) {
 }
 
 uint16_t createFilament(uint16_t vendorId, const JsonDocument& payload) {
+    oledShowProgressBar(4, 5, "New Brand", "Create Filament");
+
     // Create new filament in Spoolman database using task system
     // Note: Due to async nature, the ID will be stored in createdFilamentId global variable
     // Note: This function assumes that the caller has already ensured API is IDLE
@@ -748,34 +746,34 @@ uint16_t createFilament(uint16_t vendorId, const JsonDocument& payload) {
 
     // Create JSON payload for filament creation
     JsonDocument filamentDoc;
-    filamentDoc["name"] = payload["color_name"].as<String>();
+    filamentDoc["name"] = payload["cn"].as<String>();
     filamentDoc["vendor_id"] = String(vendorId);
-    filamentDoc["material"] = payload["type"].as<String>();
-    filamentDoc["density"] = (payload["density"].is<String>() && payload["density"].as<String>().length() > 0) ? payload["density"].as<String>() : "1.24";
-    filamentDoc["diameter"] = (payload["diameter"].is<String>() && payload["diameter"].as<String>().length() > 0) ? payload["diameter"].as<String>() : "1.75";
+    filamentDoc["material"] = payload["t"].as<String>();
+    filamentDoc["density"] = (payload["de"].is<String>() && payload["de"].as<String>().length() > 0) ? payload["de"].as<String>() : "1.24";
+    filamentDoc["diameter"] = (payload["di"].is<String>() && payload["di"].as<String>().length() > 0) ? payload["di"].as<String>() : "1.75";
     filamentDoc["weight"] = String(weight);
-    filamentDoc["spool_weight"] = payload["spool_weight"].as<String>();
-    filamentDoc["article_number"] = payload["artnr"].as<String>();
-    filamentDoc["settings_extruder_temp"] = payload["extruder_temp"].is<String>() ? payload["extruder_temp"].as<String>() : "";
-    filamentDoc["settings_bed_temp"] = payload["bed_temp"].is<String>() ? payload["bed_temp"].as<String>() : "";
-    
-    if (payload["artnr"].is<String>())
+    filamentDoc["spool_weight"] = payload["sw"].as<String>();
+    filamentDoc["article_number"] = payload["an"].as<String>();
+    filamentDoc["settings_extruder_temp"] = payload["et"].is<String>() ? payload["et"].as<String>() : "";
+    filamentDoc["settings_bed_temp"] = payload["bt"].is<String>() ? payload["bt"].as<String>() : "";
+
+    if (payload["an"].is<String>())
     {
-        filamentDoc["external_id"] = payload["artnr"].as<String>();
-        filamentDoc["comment"] = payload["url"].is<String>() ? payload["url"].as<String>() + payload["artnr"].as<String>() : "automatically generated";
+        filamentDoc["external_id"] = payload["an"].as<String>();
+        filamentDoc["comment"] = payload["u"].is<String>() ? payload["u"].as<String>() + payload["an"].as<String>() : "automatically generated";
     }
     else
     {
-        filamentDoc["comment"] = payload["url"].is<String>() ? payload["url"].as<String>() : "automatically generated";
+        filamentDoc["comment"] = payload["u"].is<String>() ? payload["u"].as<String>() : "automatically generated";
     }
 
-    if (payload["multi_color_hexes"].is<String>()) {
-        filamentDoc["multi_color_hexes"] = payload["multi_color_hexes"].as<String>();
-        filamentDoc["multi_color_direction"] = payload["multi_color_direction"].is<String>() ? payload["multi_color_direction"].as<String>() : "";
+    if (payload["mc"].is<String>()) {
+        filamentDoc["multi_color_hexes"] = payload["mc"].as<String>();
+        filamentDoc["multi_color_direction"] = payload["mcd"].is<String>() ? payload["mcd"].as<String>() : "";
     }
     else
     {
-        filamentDoc["color_hex"] = (payload["color_hex"].is<String>() && payload["color_hex"].as<String>().length() >= 6) ? payload["color_hex"].as<String>() : "FFFFFF";
+        filamentDoc["color_hex"] = (payload["c"].is<String>() && payload["c"].as<String>().length() >= 6) ? payload["c"].as<String>() : "FFFFFF";
     }
 
     String filamentPayload;
@@ -813,6 +811,9 @@ uint16_t createFilament(uint16_t vendorId, const JsonDocument& payload) {
 
     filamentDoc.clear();
     
+    // Delay for Display Bar
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+
     // Wait for task completion and return the created filament ID
     // Note: createdFilamentId will be set by sendToApi when response is received
     while(createdFilamentId == 65535) {
@@ -823,6 +824,8 @@ uint16_t createFilament(uint16_t vendorId, const JsonDocument& payload) {
 }
 
 uint16_t checkFilament(uint16_t vendorId, const JsonDocument& payload) {
+    oledShowProgressBar(3, 5, "New Brand", "Check Filament");
+
     // Check if filament exists using task system
     foundFilamentId = 65535; // Reset to invalid value to detect when API response is received
 
@@ -875,6 +878,8 @@ uint16_t checkFilament(uint16_t vendorId, const JsonDocument& payload) {
 }
 
 uint16_t createSpool(uint16_t vendorId, uint16_t filamentId, JsonDocument& payload, String uidString) {
+    oledShowProgressBar(5, 5, "New Brand", "Create new Spool");
+
     // Create new spool in Spoolman database using task system
     // Note: Due to async nature, the ID will be stored in createdSpoolId global variable
     // Note: This function assumes that the caller has already ensured API is IDLE
@@ -883,17 +888,14 @@ uint16_t createSpool(uint16_t vendorId, uint16_t filamentId, JsonDocument& paylo
     String spoolsUrl = spoolmanUrl + apiUrl + "/spool";
     Serial.print("Create spool with URL: ");
     Serial.println(spoolsUrl);
-    //String currentDate = getCurrentDateISO8601();
 
     // Create JSON payload for spool creation
     JsonDocument spoolDoc;
-    //spoolDoc["first_used"] = String(currentDate);
-    //spoolDoc["last_used"] = String(currentDate);
     spoolDoc["filament_id"] = String(filamentId);
-    spoolDoc["initial_weight"] = weight > 10 ? String(weight-payload["spool_weight"].as<int>()) : "1000";
-    spoolDoc["spool_weight"] = (payload["spool_weight"].is<String>() && payload["spool_weight"].as<String>().length() > 0) ? payload["spool_weight"].as<String>() : "180";
-    spoolDoc["remaining_weight"] = (payload["weight"].is<String>() && payload["weight"].as<String>().length() > 0) ? payload["weight"].as<String>() : "1000";
-    spoolDoc["lot_nr"] = (payload["lotnr"].is<String>() && payload["lotnr"].as<String>().length() > 0) ? payload["lotnr"].as<String>() : "";
+    spoolDoc["initial_weight"] = weight > 10 ? String(weight - payload["sw"].as<int>()) : "1000";
+    spoolDoc["spool_weight"] = (payload["sw"].is<String>() && payload["sw"].as<String>().length() > 0) ? payload["sw"].as<String>() : "180";
+    spoolDoc["remaining_weight"] = spoolDoc["initial_weight"];
+    spoolDoc["lot_nr"] = (payload["an"].is<String>() && payload["an"].as<String>().length() > 0) ? payload["an"].as<String>() : "";
     spoolDoc["comment"] = "automatically generated";
     spoolDoc["extra"]["nfc_id"] = "\"" + uidString + "\"";
 
@@ -938,20 +940,33 @@ uint16_t createSpool(uint16_t vendorId, uint16_t filamentId, JsonDocument& paylo
 
     // Write data to tag with startWriteJsonToTag
     // void startWriteJsonToTag(const bool isSpoolTag, const char* payload);
-    payload["sm_id"].set(String(createdSpoolId));
+    
+    // Create optimized JSON structure with sm_id at the beginning for fast-path detection
+    JsonDocument optimizedPayload;
+    optimizedPayload["sm_id"] = String(createdSpoolId);  // Place sm_id first for fast scanning
+    optimizedPayload["b"] = payload["b"].as<String>();
+    optimizedPayload["cn"] = payload["an"].as<String>();
     
     String payloadString;
-    serializeJson(payload, payloadString);
+    serializeJson(optimizedPayload, payloadString);
+    
+    Serial.println("Optimized JSON with sm_id first:");
+    Serial.println(payloadString);
+    
+    optimizedPayload.clear();
     
     nfcReaderState = NFC_IDLE;
-    vTaskDelay(50 / portTICK_PERIOD_MS);
+
+    // Delay for Display Bar
+    vTaskDelay(1000 / portTICK_PERIOD_MS);
+    
     startWriteJsonToTag(true, payloadString.c_str());
 
     return createdSpoolId;
 }
 
 bool createBrandFilament(JsonDocument& payload, String uidString) {
-    uint16_t vendorId = checkVendor(payload["brand"].as<String>());
+    uint16_t vendorId = checkVendor(payload["b"].as<String>());
     if (vendorId == 0) {
         Serial.println("ERROR: Failed to create/find vendor");
         return false;

src/display.cpp

@@ -235,7 +235,7 @@ void oledShowIcon(const char* icon) {
     display.display();
 }
 
-void oledShowProgressBar(const uint8_t step, const uint8_t numSteps, const char* largeText, const char* statusMessage){
+void oledShowProgressBar(const uint8_t step, const uint8_t numSteps, const char* largeText, const char* statusMessage) {
     assert(step <= numSteps);
 
     // clear data and bar area

src/nfc.cpp

@@ -23,6 +23,7 @@ bool tagProcessed = false;
 volatile bool pauseBambuMqttTask = false;
 volatile bool nfcReadingTaskSuspendRequest = false;
 volatile bool nfcReadingTaskSuspendState = false;
+volatile bool nfcWriteInProgress = false; // Prevent any tag operations during write
 
 struct NfcWriteParameterType {
   bool tagType;
@@ -314,6 +315,71 @@ uint8_t ntag2xx_WriteNDEF(const char *payload) {
   Serial.print("Max Writable Page: ");Serial.println(maxWritablePage);
   Serial.println("========================");
 
+  // Perform additional tag validation by testing write boundaries
+  Serial.println("=== TAG VALIDATION ===");
+  uint8_t testBuffer[4] = {0x00, 0x00, 0x00, 0x00};
+  
+  // Test if we can actually read the max page
+  if (!nfc.ntag2xx_ReadPage(maxWritablePage, testBuffer)) {
+    Serial.print("WARNING: Cannot read declared max page ");
+    Serial.println(maxWritablePage);
+    
+    // Find actual maximum writable page by testing backwards with optimized approach
+    uint16_t actualMaxPage = maxWritablePage;
+    Serial.println("Searching for actual maximum writable page...");
+    
+    // Use binary search approach for faster page limit detection
+    uint16_t lowPage = 4;
+    uint16_t highPage = maxWritablePage;
+    uint16_t testAttempts = 0;
+    const uint16_t maxTestAttempts = 15; // Limit search attempts
+    
+    while (lowPage <= highPage && testAttempts < maxTestAttempts) {
+      uint16_t midPage = (lowPage + highPage) / 2;
+      testAttempts++;
+      
+      Serial.print("Testing page ");
+      Serial.print(midPage);
+      Serial.print(" (attempt ");
+      Serial.print(testAttempts);
+      Serial.print("/");
+      Serial.print(maxTestAttempts);
+      Serial.print(")... ");
+      
+      if (nfc.ntag2xx_ReadPage(midPage, testBuffer)) {
+        Serial.println("✓");
+        actualMaxPage = midPage;
+        lowPage = midPage + 1; // Search higher
+      } else {
+        Serial.println("❌");
+        highPage = midPage - 1; // Search lower
+      }
+      
+      // Small delay to prevent interface overload
+      vTaskDelay(5 / portTICK_PERIOD_MS);
+      yield();
+    }
+    
+    Serial.print("Found actual max readable page: ");
+    Serial.println(actualMaxPage);
+    Serial.print("Search completed in ");
+    Serial.print(testAttempts);
+    Serial.println(" attempts");
+    
+    maxWritablePage = actualMaxPage;
+  } else {
+    Serial.print("✓ Max page ");Serial.print(maxWritablePage);Serial.println(" is readable");
+  }
+  
+  // Calculate maximum available user data based on actual writable pages
+  uint16_t actualUserDataSize = (maxWritablePage - 3) * 4; // -3 because pages 0-3 are header
+  availableUserData = actualUserDataSize;
+  
+  Serial.print("Actual available user data: ");
+  Serial.print(actualUserDataSize);
+  Serial.println(" bytes");
+  Serial.println("========================");
+
   uint8_t pageBuffer[4] = {0, 0, 0, 0};
   Serial.println("Beginne mit dem Schreiben der NDEF-Nachricht...");
   
@@ -375,15 +441,317 @@ uint8_t ntag2xx_WriteNDEF(const char *payload) {
 
   Serial.println("✓ Payload passt in den Tag - Schreibvorgang wird fortgesetzt");
 
-  // IMPORTANT: Use safe NDEF initialization instead of aggressive clearing
-  Serial.println("Schritt 1: Sichere NDEF-Initialisierung...");
+  // STEP 1: NFC Interface Reset and Reinitialization
+  Serial.println();
+  Serial.println("=== SCHRITT 1: NFC-INTERFACE RESET UND NEUINITIALISIERUNG ===");
+  
+  // First, check if the NFC interface is working at all
+  Serial.println("Teste aktuellen NFC-Interface-Zustand...");
+  
+  // Try to read capability container (which worked during detection)
+  uint8_t ccTest[4];
+  bool ccReadable = nfc.ntag2xx_ReadPage(3, ccTest);
+  Serial.print("Capability Container (Seite 3) lesbar: ");
+  Serial.println(ccReadable ? "✓" : "❌");
+  
+  if (!ccReadable) {
+    Serial.println("❌ NFC-Interface ist nicht funktionsfähig - führe Reset durch");
+    
+    // Perform NFC interface reset and reinitialization
+    Serial.println("Führe NFC-Interface Reset durch...");
+    
+    // Step 1: Try to reinitialize the NFC interface completely
+    Serial.println("1. Neuinitialisierung des PN532...");
+    
+    // Reinitialize the PN532
+    nfc.begin();
+    vTaskDelay(500 / portTICK_PERIOD_MS); // Give it time to initialize
+    
+    // Check firmware version to ensure communication is working
+    uint32_t versiondata = nfc.getFirmwareVersion();
+    if (versiondata) {
+      Serial.print("PN532 Firmware Version: 0x");
+      Serial.println(versiondata, HEX);
+      Serial.println("✓ PN532 Kommunikation wiederhergestellt");
+    } else {
+      Serial.println("❌ PN532 Kommunikation fehlgeschlagen");
+      oledShowMessage("NFC Reset failed");
+      vTaskDelay(3000 / portTICK_PERIOD_MS);
+      return 0;
+    }
+    
+    // Step 2: Reconfigure SAM
+    Serial.println("2. SAM-Konfiguration...");
+    nfc.SAMConfig();
+    vTaskDelay(200 / portTICK_PERIOD_MS);
+    
+    // Step 3: Re-detect the tag
+    Serial.println("3. Tag-Wiedererkennung...");
+    uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };
+    uint8_t uidLength;
+    bool tagRedetected = false;
+    
+    for (int attempts = 0; attempts < 5; attempts++) {
+      Serial.print("Tag-Erkennungsversuch ");
+      Serial.print(attempts + 1);
+      Serial.print("/5... ");
+      
+      if (nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength, 1000)) {
+        Serial.println("✓");
+        tagRedetected = true;
+        break;
+      } else {
+        Serial.println("❌");
+        vTaskDelay(300 / portTICK_PERIOD_MS);
+      }
+    }
+    
+    if (!tagRedetected) {
+      Serial.println("❌ Tag konnte nach Reset nicht wiedererkannt werden");
+      oledShowMessage("Tag lost after reset");
+      vTaskDelay(3000 / portTICK_PERIOD_MS);
+      return 0;
+    }
+    
+    Serial.println("✓ Tag erfolgreich wiedererkannt");
+    
+    // Step 4: Test basic page reading
+    Serial.println("4. Test der Grundfunktionalität...");
+    vTaskDelay(200 / portTICK_PERIOD_MS); // Give interface time to stabilize
+    
+    ccReadable = nfc.ntag2xx_ReadPage(3, ccTest);
+    Serial.print("Capability Container nach Reset lesbar: ");
+    Serial.println(ccReadable ? "✓" : "❌");
+    
+    if (!ccReadable) {
+      Serial.println("❌ NFC-Interface funktioniert nach Reset immer noch nicht");
+      oledShowMessage("NFC still broken");
+      vTaskDelay(3000 / portTICK_PERIOD_MS);
+      return 0;
+    }
+    
+    Serial.println("✓ NFC-Interface erfolgreich wiederhergestellt");
+  } else {
+    Serial.println("✓ NFC-Interface ist funktionsfähig");
+  }
+  
+  // Display CC content for debugging
+  if (ccReadable) {
+    Serial.print("CC Inhalt: ");
+    for (int i = 0; i < 4; i++) {
+      if (ccTest[i] < 0x10) Serial.print("0");
+      Serial.print(ccTest[i], HEX);
+      Serial.print(" ");
+    }
+    Serial.println();
+  }
+  
+  Serial.println("=== SCHRITT 2: INTERFACE-FUNKTIONSTEST ===");
+  
+  // Test a few critical pages to ensure stable operation
+  uint8_t testData[4];
+  bool basicPagesReadable = true;
+  
+  for (uint8_t testPage = 0; testPage <= 6; testPage++) {
+    bool readable = nfc.ntag2xx_ReadPage(testPage, testData);
+    Serial.print("Seite ");
+    Serial.print(testPage);
+    Serial.print(": ");
+    if (readable) {
+      Serial.print("✓ - ");
+      for (int i = 0; i < 4; i++) {
+        if (testData[i] < 0x10) Serial.print("0");
+        Serial.print(testData[i], HEX);
+        Serial.print(" ");
+      }
+      Serial.println();
+    } else {
+      Serial.println("❌ - Nicht lesbar");
+      if (testPage >= 3 && testPage <= 6) { // Critical pages for NDEF
+        basicPagesReadable = false;
+      }
+    }
+    vTaskDelay(10 / portTICK_PERIOD_MS); // Small delay between reads
+  }
+  
+  if (!basicPagesReadable) {
+    Serial.println("❌ KRITISCHER FEHLER: Grundlegende NDEF-Seiten nicht lesbar!");
+    Serial.println("Tag oder Interface ist defekt");
+    oledShowMessage("Tag/Interface defect");
+    vTaskDelay(3000 / portTICK_PERIOD_MS);
+    return 0;
+  }
+  
+  Serial.println("✓ Alle kritischen Seiten sind lesbar");
+  Serial.println("===================================================");
+
+  Serial.println();
+  Serial.println("=== SCHRITT 3: SCHREIBBEREITSCHAFTSTEST ===");
+  
+  // Test write capabilities before attempting the full write
+  Serial.println("Teste Schreibfähigkeiten des Tags...");
+  
+  uint8_t testPage[4] = {0xAA, 0xBB, 0xCC, 0xDD}; // Test pattern
+  uint8_t originalPage[4]; // Store original content
+  
+  // First, read original content of test page
+  if (!nfc.ntag2xx_ReadPage(10, originalPage)) {
+    Serial.println("FEHLER: Kann Testseite nicht lesen für Backup");
+    oledShowMessage("Test page read error");
+    vTaskDelay(3000 / portTICK_PERIOD_MS);
+    return 0;
+  }
+  
+  Serial.print("Original Inhalt Seite 10: ");
+  for (int i = 0; i < 4; i++) {
+    if (originalPage[i] < 0x10) Serial.print("0");
+    Serial.print(originalPage[i], HEX);
+    Serial.print(" ");
+  }
+  Serial.println();
+  
+  // Perform write test
+  if (!nfc.ntag2xx_WritePage(10, testPage)) {
+    Serial.println("FEHLER: Schreibtest fehlgeschlagen!");
+    Serial.println("Tag ist möglicherweise schreibgeschützt oder defekt");
+    
+    // Additional diagnostics
+    Serial.println("=== ERWEITERTE SCHREIBTEST-DIAGNOSE ===");
+    
+    // Check if tag is still present
+    uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };
+    uint8_t uidLength;
+    bool tagStillPresent = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength, 1000);
+    Serial.print("Tag noch erkannt: ");
+    Serial.println(tagStillPresent ? "✓" : "❌");
+    
+    if (!tagStillPresent) {
+      Serial.println("URSACHE: Tag wurde während Schreibtest entfernt!");
+      oledShowMessage("Tag removed");
+    } else {
+      Serial.println("URSACHE: Tag ist vorhanden aber nicht beschreibbar");
+      Serial.println("Möglicherweise: Schreibschutz, Defekt, oder Interface-Problem");
+      oledShowMessage("Tag write protected?");
+    }
+    Serial.println("==========================================");
+    
+    vTaskDelay(3000 / portTICK_PERIOD_MS);
+    return 0;
+  }
+  
+  // Verify test write
+  uint8_t readBack[4];
+  vTaskDelay(20 / portTICK_PERIOD_MS); // Wait for write to complete
+  
+  if (!nfc.ntag2xx_ReadPage(10, readBack)) {
+    Serial.println("FEHLER: Kann Testdaten nicht zurücklesen!");
+    oledShowMessage("Test verify failed");
+    vTaskDelay(3000 / portTICK_PERIOD_MS);
+    return 0;
+  }
+  
+  bool testSuccess = true;
+  for (int i = 0; i < 4; i++) {
+    if (readBack[i] != testPage[i]) {
+      testSuccess = false;
+      break;
+    }
+  }
+  
+  if (!testSuccess) {
+    Serial.println("FEHLER: Schreibtest fehlgeschlagen - Daten stimmen nicht überein!");
+    Serial.print("Geschrieben: ");
+    for (int i = 0; i < 4; i++) {
+      Serial.print(testPage[i], HEX); Serial.print(" ");
+    }
+    Serial.println();
+    Serial.print("Gelesen: ");
+    for (int i = 0; i < 4; i++) {
+      Serial.print(readBack[i], HEX); Serial.print(" ");
+    }
+    Serial.println();
+    return 0;
+  }
+  
+  // Restore original content
+  Serial.println("Stelle ursprünglichen Inhalt wieder her...");
+  if (!nfc.ntag2xx_WritePage(10, originalPage)) {
+    Serial.println("WARNUNG: Konnte ursprünglichen Inhalt nicht wiederherstellen!");
+  } else {
+    Serial.println("✓ Ursprünglicher Inhalt wiederhergestellt");
+  }
+  
+  Serial.println("✓ Schreibtest erfolgreich - Tag ist voll funktionsfähig");
+  Serial.println("======================================================");
+
+  // STEP 4: NDEF initialization with verification
+  Serial.println();
+  Serial.println("=== SCHRITT 4: NDEF-INITIALISIERUNG ===");
   if (!initializeNdefStructure()) {
     Serial.println("FEHLER: Konnte NDEF-Struktur nicht initialisieren!");
     oledShowMessage("NDEF init failed");
     vTaskDelay(2000 / portTICK_PERIOD_MS);
     return 0;
   }
-  Serial.println("✓ NDEF-Struktur sicher initialisiert");
+  
+  // Verify NDEF initialization
+  uint8_t ndefCheck[8];
+  bool ndefVerified = true;
+  for (uint8_t page = 4; page < 6; page++) {
+    if (!nfc.ntag2xx_ReadPage(page, &ndefCheck[(page-4)*4])) {
+      ndefVerified = false;
+      break;
+    }
+  }
+  
+  if (ndefVerified) {
+    Serial.print("NDEF-Header nach Initialisierung: ");
+    for (int i = 0; i < 8; i++) {
+      if (ndefCheck[i] < 0x10) Serial.print("0");
+      Serial.print(ndefCheck[i], HEX);
+      Serial.print(" ");
+    }
+    Serial.println();
+  }
+  
+  Serial.println("✓ NDEF-Struktur initialisiert und verifiziert");
+  Serial.println("==========================================");
+
+  // STEP 5: Allow interface to stabilize before major write operation
+  Serial.println();
+  Serial.println("=== SCHRITT 5: NFC-INTERFACE STABILISIERUNG ===");
+  Serial.println("Stabilisiere NFC-Interface vor Hauptschreibvorgang...");
+  
+  // Give the interface time to fully settle after NDEF initialization
+  vTaskDelay(200 / portTICK_PERIOD_MS);
+  
+  // Test interface stability with a simple read
+  uint8_t stabilityTest[4];
+  bool interfaceStable = false;
+  for (int attempts = 0; attempts < 3; attempts++) {
+    if (nfc.ntag2xx_ReadPage(4, stabilityTest)) {
+      Serial.print("Interface stability test ");
+      Serial.print(attempts + 1);
+      Serial.println("/3: ✓");
+      interfaceStable = true;
+      break;
+    } else {
+      Serial.print("Interface stability test ");
+      Serial.print(attempts + 1);
+      Serial.println("/3: ❌");
+      vTaskDelay(100 / portTICK_PERIOD_MS);
+    }
+  }
+  
+  if (!interfaceStable) {
+    Serial.println("FEHLER: NFC-Interface ist nicht stabil genug für Schreibvorgang");
+    oledShowMessage("NFC Interface unstable");
+    vTaskDelay(3000 / portTICK_PERIOD_MS);
+    return 0;
+  }
+  
+  Serial.println("✓ NFC-Interface ist stabil - Schreibvorgang kann beginnen");
+  Serial.println("=========================================================");
 
   // Allocate memory for the complete TLV structure
   uint8_t* tlvData = (uint8_t*) malloc(totalTlvSize);
@@ -444,7 +812,8 @@ uint8_t ntag2xx_WriteNDEF(const char *payload) {
   uint8_t pageNumber = 4;
   uint16_t totalBytes = offset + 1;
 
-  Serial.println("Schritt 2: Schreibe neue NDEF-Daten...");
+  Serial.println();
+  Serial.println("=== SCHRITT 6: SCHREIBE NEUE NDEF-DATEN ===");
   Serial.print("Schreibe ");
   Serial.print(totalBytes);
   Serial.print(" Bytes in ");
@@ -452,6 +821,13 @@ uint8_t ntag2xx_WriteNDEF(const char *payload) {
   Serial.println(" Seiten...");
 
   while (bytesWritten < totalBytes && pageNumber <= maxWritablePage) {
+    // Additional safety check before writing each page
+    if (pageNumber > maxWritablePage) {
+      Serial.print("STOP: Reached maximum writable page ");
+      Serial.println(maxWritablePage);
+      break;
+    }
+    
     // Clear page buffer
     memset(pageBuffer, 0, 4);
     
@@ -461,16 +837,98 @@ uint8_t ntag2xx_WriteNDEF(const char *payload) {
     // Copy data to page buffer
     memcpy(pageBuffer, &tlvData[bytesWritten], bytesToWrite);
 
-    // Write page to tag
-    if (!nfc.ntag2xx_WritePage(pageNumber, pageBuffer)) {
+    // Write page to tag with retry mechanism
+    bool writeSuccess = false;
+    for (int writeAttempt = 0; writeAttempt < 3; writeAttempt++) {
+      if (nfc.ntag2xx_WritePage(pageNumber, pageBuffer)) {
+        writeSuccess = true;
+        break;
+      } else {
+        Serial.print("Schreibversuch ");
+        Serial.print(writeAttempt + 1);
+        Serial.print("/3 für Seite ");
+        Serial.print(pageNumber);
+        Serial.println(" fehlgeschlagen");
+        
+        if (writeAttempt < 2) {
+          vTaskDelay(50 / portTICK_PERIOD_MS); // Wait before retry
+        }
+      }
+    }
+
+    if (!writeSuccess) {
       Serial.print("FEHLER beim Schreiben der Seite ");
       Serial.println(pageNumber);
       Serial.print("Möglicherweise Page-Limit erreicht für ");
       Serial.println(tagType);
+      Serial.print("Erwartetes Maximum: ");
+      Serial.println(maxWritablePage);
+      Serial.print("Tatsächliches Maximum scheint niedriger zu sein!");
+      
+      // Update max page for future operations
+      if (pageNumber > 4) {
+        Serial.print("Setze neues Maximum auf Seite ");
+        Serial.println(pageNumber - 1);
+      }
+      
       free(tlvData);
       return 0;
     }
 
+    // IMMEDIATE verification after each write - this is critical!
+    Serial.print("Verifiziere Seite ");
+    Serial.print(pageNumber);
+    Serial.print("... ");
+    
+    uint8_t verifyBuffer[4];
+    vTaskDelay(20 / portTICK_PERIOD_MS); // Increased delay before verification
+    
+    // Verification with retry mechanism
+    bool verifySuccess = false;
+    for (int verifyAttempt = 0; verifyAttempt < 3; verifyAttempt++) {
+      if (nfc.ntag2xx_ReadPage(pageNumber, verifyBuffer)) {
+        bool writeMatches = true;
+        for (int i = 0; i < bytesToWrite; i++) {
+          if (verifyBuffer[i] != pageBuffer[i]) {
+            writeMatches = false;
+            Serial.println();
+            Serial.print("VERIFIKATIONSFEHLER bei Byte ");
+            Serial.print(i);
+            Serial.print(" - Erwartet: 0x");
+            Serial.print(pageBuffer[i], HEX);
+            Serial.print(", Gelesen: 0x");
+            Serial.println(verifyBuffer[i], HEX);
+            break;
+          }
+        }
+        
+        if (writeMatches) {
+          verifySuccess = true;
+          break;
+        } else if (verifyAttempt < 2) {
+          Serial.print("Verifikationsversuch ");
+          Serial.print(verifyAttempt + 1);
+          Serial.println("/3 fehlgeschlagen, wiederhole...");
+          vTaskDelay(30 / portTICK_PERIOD_MS);
+        }
+      } else {
+        Serial.print("Verifikations-Read-Versuch ");
+        Serial.print(verifyAttempt + 1);
+        Serial.println("/3 fehlgeschlagen");
+        if (verifyAttempt < 2) {
+          vTaskDelay(30 / portTICK_PERIOD_MS);
+        }
+      }
+    }
+    
+    if (!verifySuccess) {
+      Serial.println("❌ SCHREIBVORGANG/VERIFIKATION FEHLGESCHLAGEN!");
+      free(tlvData);
+      return 0;
+    } else {
+      Serial.println("✓");
+    }
+
     Serial.print("Seite ");
     Serial.print(pageNumber);
     Serial.print(" ✓: ");
@@ -485,7 +943,7 @@ uint8_t ntag2xx_WriteNDEF(const char *payload) {
     pageNumber++;
     
     yield();
-    vTaskDelay(5 / portTICK_PERIOD_MS); // Small delay between page writes
+    vTaskDelay(10 / portTICK_PERIOD_MS); // Slightly increased delay between page writes
   }
 
   free(tlvData);
@@ -511,7 +969,58 @@ uint8_t ntag2xx_WriteNDEF(const char *payload) {
   Serial.print((bytesWritten * 100) / availableUserData);
   Serial.println("%");
   Serial.println("✓ Bestehende Daten wurden überschrieben");
+  
+  // CRITICAL: Allow NFC interface to stabilize after write operation
   Serial.println();
+  Serial.println("=== SCHRITT 7: NFC-INTERFACE STABILISIERUNG NACH SCHREIBVORGANG ===");
+  Serial.println("Stabilisiere NFC-Interface nach Schreibvorgang...");
+  
+  // Give the tag and interface time to settle after write operation
+  vTaskDelay(300 / portTICK_PERIOD_MS); // Increased stabilization time
+  
+  // Test if the interface is still responsive
+  uint8_t postWriteTest[4];
+  bool interfaceResponsive = false;
+  
+  for (int stabilityAttempt = 0; stabilityAttempt < 5; stabilityAttempt++) {
+    Serial.print("Post-write interface test ");
+    Serial.print(stabilityAttempt + 1);
+    Serial.print("/5... ");
+    
+    if (nfc.ntag2xx_ReadPage(3, postWriteTest)) { // Read capability container
+      Serial.println("✓");
+      interfaceResponsive = true;
+      break;
+    } else {
+      Serial.println("❌");
+      
+      if (stabilityAttempt < 4) {
+        Serial.println("Warte und versuche Interface zu stabilisieren...");
+        vTaskDelay(200 / portTICK_PERIOD_MS);
+        
+        // Try to re-establish communication with a simple tag presence check
+        uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };
+        uint8_t uidLength;
+        bool tagStillPresent = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength, 1000);
+        Serial.print("Tag presence check: ");
+        Serial.println(tagStillPresent ? "✓" : "❌");
+        
+        if (!tagStillPresent) {
+          Serial.println("Tag wurde während/nach Schreibvorgang entfernt!");
+          break;
+        }
+      }
+    }
+  }
+  
+  if (!interfaceResponsive) {
+    Serial.println("WARNUNG: NFC-Interface reagiert nach Schreibvorgang nicht mehr stabil");
+    Serial.println("Schreibvorgang war erfolgreich, aber Interface benötigt möglicherweise Reset");
+  } else {
+    Serial.println("✓ NFC-Interface ist nach Schreibvorgang stabil");
+  }
+  
+  Serial.println("==================================================================");
   
   return 1;
 }
@@ -735,7 +1244,7 @@ bool decodeNdefAndReturnJson(const byte* encodedMessage, String uidString) {
       }
       // Brand Filament not registered to Spoolman
       else if ((!doc["sm_id"].is<String>() || (doc["sm_id"].is<String>() && (doc["sm_id"] == "0" || doc["sm_id"] == "")))
-              && doc["brand"].is<String>() && doc["artnr"].is<String>())
+              && doc["b"].is<String>() && doc["an"].is<String>())
       {
         doc["sm_id"] = "0"; // Ensure sm_id is set to 0
         // If no sm_id is present but the brand is Brand Filament then
@@ -759,6 +1268,216 @@ bool decodeNdefAndReturnJson(const byte* encodedMessage, String uidString) {
   return true;
 }
 
+bool quickSpoolIdCheck(String uidString) {
+    // Fast-path: Read NDEF structure to quickly locate and check JSON payload
+    // This dramatically speeds up known spool recognition
+    
+    // CRITICAL: Do not execute during write operations!
+    if (nfcWriteInProgress) {
+        Serial.println("FAST-PATH: Skipped during write operation");
+        return false;
+    }
+    
+    Serial.println("=== FAST-PATH: Quick sm_id Check ===");
+    
+    // Read enough pages to cover NDEF header + beginning of payload (pages 4-8 = 20 bytes)
+    uint8_t ndefData[20];
+    memset(ndefData, 0, 20);
+    
+    for (uint8_t page = 4; page < 9; page++) {
+        if (!nfc.ntag2xx_ReadPage(page, ndefData + (page - 4) * 4)) {
+            Serial.print("Failed to read page ");
+            Serial.println(page);
+            return false; // Fall back to full read
+        }
+    }
+    
+    // Parse NDEF structure to find JSON payload start
+    Serial.print("Raw NDEF data (first 20 bytes): ");
+    for (int i = 0; i < 20; i++) {
+        if (ndefData[i] < 0x10) Serial.print("0");
+        Serial.print(ndefData[i], HEX);
+        Serial.print(" ");
+    }
+    Serial.println();
+    
+    // Look for NDEF TLV (0x03) at the beginning
+    int tlvOffset = -1;
+    for (int i = 0; i < 8; i++) {
+        if (ndefData[i] == 0x03) {
+            tlvOffset = i;
+            Serial.print("Found NDEF TLV at offset: ");
+            Serial.println(tlvOffset);
+            break;
+        }
+    }
+    
+    if (tlvOffset == -1) {
+        Serial.println("✗ FAST-PATH: No NDEF TLV found");
+        return false;
+    }
+    
+    // Parse NDEF record to find JSON payload
+    int ndefRecordStart;
+    if (ndefData[tlvOffset + 1] == 0xFF) {
+        // Extended length format
+        ndefRecordStart = tlvOffset + 4;
+    } else {
+        // Standard length format
+        ndefRecordStart = tlvOffset + 2;
+    }
+    
+    if (ndefRecordStart >= 20) {
+        Serial.println("✗ FAST-PATH: NDEF record starts beyond read data");
+        return false;
+    }
+    
+    // Parse NDEF record header
+    uint8_t recordHeader = ndefData[ndefRecordStart];
+    uint8_t typeLength = ndefData[ndefRecordStart + 1];
+    
+    // Calculate payload offset
+    uint8_t payloadLengthBytes = (recordHeader & 0x10) ? 1 : 4; // SR flag check
+    uint8_t idLength = (recordHeader & 0x08) ? ndefData[ndefRecordStart + 2 + payloadLengthBytes + typeLength] : 0; // IL flag check
+    
+    int payloadOffset = ndefRecordStart + 1 + 1 + payloadLengthBytes + typeLength + idLength;
+    
+    Serial.print("NDEF Record Header: 0x");
+    Serial.print(recordHeader, HEX);
+    Serial.print(", Type Length: ");
+    Serial.print(typeLength);
+    Serial.print(", Payload offset: ");
+    Serial.println(payloadOffset);
+    
+    // Check if payload starts within our read data
+    if (payloadOffset >= 20) {
+        Serial.println("✗ FAST-PATH: JSON payload starts beyond quick read data - need more pages");
+        
+        // Read additional pages to get to JSON payload
+        uint8_t extraData[16]; // Read 4 more pages
+        memset(extraData, 0, 16);
+        
+        for (uint8_t page = 9; page < 13; page++) {
+            if (!nfc.ntag2xx_ReadPage(page, extraData + (page - 9) * 4)) {
+                Serial.print("Failed to read additional page ");
+                Serial.println(page);
+                return false;
+            }
+        }
+        
+        // Combine data
+        uint8_t combinedData[36];
+        memcpy(combinedData, ndefData, 20);
+        memcpy(combinedData + 20, extraData, 16);
+        
+        // Extract JSON from combined data
+        String jsonStart = "";
+        int jsonStartPos = payloadOffset;
+        for (int i = 0; i < 36 - payloadOffset && i < 30; i++) {
+            uint8_t currentByte = combinedData[payloadOffset + i];
+            if (currentByte >= 32 && currentByte <= 126) {
+                jsonStart += (char)currentByte;
+            }
+            // Stop at first brace to get just the beginning
+            if (currentByte == '{' && i > 0) break;
+        }
+        
+        Serial.print("JSON start from extended read: ");
+        Serial.println(jsonStart);
+        
+        // Check for sm_id pattern - look for non-zero sm_id values
+        if (jsonStart.indexOf("\"sm_id\":\"") >= 0) {
+            int smIdStart = jsonStart.indexOf("\"sm_id\":\"") + 9;
+            int smIdEnd = jsonStart.indexOf("\"", smIdStart);
+            
+            if (smIdEnd > smIdStart && smIdEnd < jsonStart.length()) {
+                String quickSpoolId = jsonStart.substring(smIdStart, smIdEnd);
+                Serial.print("Found sm_id in extended read: ");
+                Serial.println(quickSpoolId);
+                
+                // Only process if sm_id is not "0" (known spool)
+                if (quickSpoolId != "0" && quickSpoolId.length() > 0) {
+                    Serial.println("✓ FAST-PATH: Known spool detected!");
+                    
+                    // Set as active spool immediately
+                    activeSpoolId = quickSpoolId;
+                    lastSpoolId = activeSpoolId;
+                    
+                    oledShowProgressBar(2, octoEnabled?5:4, "Known Spool", "Quick mode");
+                    Serial.println("✓ FAST-PATH SUCCESS: Known spool processed quickly");
+                    return true;
+                } else {
+                    Serial.println("✗ FAST-PATH: sm_id is 0 - new brand filament, need full read");
+                    return false;
+                }
+            }
+        }
+        
+        Serial.println("✗ FAST-PATH: No sm_id pattern in extended read");
+        return false;
+    }
+    
+    // Extract JSON payload from the available data
+    String quickJson = "";
+    for (int i = payloadOffset; i < 20 && i < payloadOffset + 15; i++) {
+        uint8_t currentByte = ndefData[i];
+        if (currentByte >= 32 && currentByte <= 126) {
+            quickJson += (char)currentByte;
+        }
+    }
+    
+    Serial.print("Quick JSON data: ");
+    Serial.println(quickJson);
+    
+    // Look for sm_id pattern in the beginning of JSON - check for known vs new spools
+    if (quickJson.indexOf("\"sm_id\":\"") >= 0) {
+        Serial.println("✓ FAST-PATH: sm_id field found");
+        
+        // Extract sm_id from quick data
+        int smIdStart = quickJson.indexOf("\"sm_id\":\"") + 9;
+        int smIdEnd = quickJson.indexOf("\"", smIdStart);
+        
+        if (smIdEnd > smIdStart && smIdEnd < quickJson.length()) {
+            String quickSpoolId = quickJson.substring(smIdStart, smIdEnd);
+            Serial.print("✓ Quick extracted sm_id: ");
+            Serial.println(quickSpoolId);
+            
+            // Only process known spools (sm_id != "0") via fast path
+            if (quickSpoolId != "0" && quickSpoolId.length() > 0) {
+                Serial.println("✓ FAST-PATH: Known spool detected!");
+                
+                // Set as active spool immediately
+                activeSpoolId = quickSpoolId;
+                lastSpoolId = activeSpoolId;
+                
+                oledShowProgressBar(2, octoEnabled?5:4, "Known Spool", "Quick mode");
+                Serial.println("✓ FAST-PATH SUCCESS: Known spool processed quickly");
+                return true;
+            } else {
+                Serial.println("✗ FAST-PATH: sm_id is 0 - new brand filament, need full read");
+                return false; // sm_id="0" means new brand filament, needs full processing
+            }
+        } else {
+            Serial.println("✗ FAST-PATH: Could not extract complete sm_id value");
+            return false; // Need full read to get complete sm_id
+        }
+    }
+    
+    // Check for other patterns that require full read
+    if (quickJson.indexOf("\"location\":\"") >= 0) {
+        Serial.println("✓ FAST-PATH: Location tag detected");
+        return false; // Need full read for location processing
+    }
+    
+    if (quickJson.indexOf("\"brand\":\"") >= 0) {
+        Serial.println("✓ FAST-PATH: Brand filament detected - may need full processing");
+        return false; // Need full read for brand filament creation
+    }
+    
+    Serial.println("✗ FAST-PATH: No recognizable pattern - falling back to full read");
+    return false; // Fall back to full tag reading
+}
+
 void writeJsonToTag(void *parameter) {
   NfcWriteParameterType* params = (NfcWriteParameterType*)parameter;
 
@@ -767,12 +1486,11 @@ void writeJsonToTag(void *parameter) {
   Serial.println(params->payload);
 
   nfcReaderState = NFC_WRITING;
+  nfcWriteInProgress = true; // Block high-level tag operations during write
 
-  // First request the reading task to be suspended and than wait until it responds
-  nfcReadingTaskSuspendRequest = true;
-  while(nfcReadingTaskSuspendState == false){
-    vTaskDelay(100 / portTICK_PERIOD_MS);
-  }
+  // Do NOT suspend the reading task - we need NFC interface for verification
+  // Just use nfcWriteInProgress to prevent scanning and fast-path operations
+  Serial.println("NFC Write Task starting - High-level operations blocked, low-level NFC available");
 
   //pauseBambuMqttTask = true;
   // aktualisieren der Website wenn sich der Status ändert
@@ -831,13 +1549,80 @@ void writeJsonToTag(void *parameter) {
         }else{
           oledShowProgressBar(1, 1, "Write Tag", "Done!");
         }
-        uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };  // Buffer to store the returned UID
+        
+        // CRITICAL: Properly stabilize NFC interface after write operation
+        Serial.println();
+        Serial.println("=== POST-WRITE NFC STABILIZATION ===");
+        
+        // Wait for tag operations to complete
+        vTaskDelay(500 / portTICK_PERIOD_MS);
+        
+        // Test tag presence and remove detection
+        uint8_t uid[] = { 0, 0, 0, 0, 0, 0, 0 };
         uint8_t uidLength;
-        yield();
-        esp_task_wdt_reset();
-        while (nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength, 400)) {
+        int tagRemovalChecks = 0;
+        
+        Serial.println("Warte bis Tag entfernt wird...");
+        
+        // Monitor tag presence
+        while (tagRemovalChecks < 10) {
           yield();
-        } 
+          esp_task_wdt_reset();
+          
+          bool tagPresent = nfc.readPassiveTargetID(PN532_MIFARE_ISO14443A, uid, &uidLength, 500);
+          
+          if (!tagPresent) {
+            Serial.println("✓ Tag wurde entfernt - NFC bereit für nächsten Scan");
+            break;
+          }
+          
+          tagRemovalChecks++;
+          Serial.print("Tag noch vorhanden (");
+          Serial.print(tagRemovalChecks);
+          Serial.println("/10)");
+          
+          vTaskDelay(500 / portTICK_PERIOD_MS);
+        }
+        
+        if (tagRemovalChecks >= 10) {
+          Serial.println("WARNUNG: Tag wurde nicht entfernt - fahre trotzdem fort");
+        }
+        
+        // Additional interface stabilization before resuming normal operations
+        Serial.println("Stabilisiere NFC-Interface für normale Operationen...");
+        vTaskDelay(200 / portTICK_PERIOD_MS);
+        
+        // Test if interface is ready for normal scanning
+        uint8_t interfaceTestBuffer[4];
+        bool interfaceReady = false;
+        
+        for (int testAttempt = 0; testAttempt < 3; testAttempt++) {
+          // Try a simple interface operation (without requiring tag presence)
+          Serial.print("Interface readiness test ");
+          Serial.print(testAttempt + 1);
+          Serial.print("/3... ");
+          
+          // Use a safe read operation that doesn't depend on tag presence
+          // This tests if the PN532 chip itself is responsive
+          uint32_t versiondata = nfc.getFirmwareVersion();
+          if (versiondata != 0) {
+            Serial.println("✓");
+            interfaceReady = true;
+            break;
+          } else {
+            Serial.println("❌");
+            vTaskDelay(100 / portTICK_PERIOD_MS);
+          }
+        }
+        
+        if (!interfaceReady) {
+          Serial.println("WARNUNG: NFC-Interface reagiert nicht - könnte normale Scans beeinträchtigen");
+        } else {
+          Serial.println("✓ NFC-Interface ist bereit für normale Scans");
+        }
+        
+        Serial.println("=========================================");
+        
         vTaskResume(RfidReaderTask);
         vTaskDelay(500 / portTICK_PERIOD_MS);        
     } 
@@ -860,7 +1645,8 @@ void writeJsonToTag(void *parameter) {
   sendWriteResult(nullptr, success);
   sendNfcData();
 
-  nfcReadingTaskSuspendRequest = false;
+  // Only reset the write protection flag - reading task was never suspended
+  nfcWriteInProgress = false; // Re-enable high-level tag operations
   pauseBambuMqttTask = false;
 
   free(params->payload);
@@ -895,8 +1681,8 @@ void startWriteJsonToTag(const bool isSpoolTag, const char* payload) {
 void scanRfidTask(void * parameter) {
   Serial.println("RFID Task gestartet");
   for(;;) {
-    // Wenn geschrieben wird Schleife aussetzen
-    if (nfcReaderState != NFC_WRITING && !nfcReadingTaskSuspendRequest && !booting)
+    // Skip scanning during write operations, but keep NFC interface active
+    if (nfcReaderState != NFC_WRITING && !nfcWriteInProgress && !nfcReadingTaskSuspendRequest && !booting)
     {
       nfcReadingTaskSuspendState = false;
       yield();
@@ -938,6 +1724,18 @@ void scanRfidTask(void * parameter) {
         
         if (uidLength == 7)
         {
+          // Try fast-path detection first for known spools
+          if (quickSpoolIdCheck(uidString)) {
+              Serial.println("✓ FAST-PATH: Tag processed quickly, skipping full read");
+              pauseBambuMqttTask = false;
+              // Set reader back to idle for next scan
+              nfcReaderState = NFC_READ_SUCCESS;
+              delay(500); // Small delay before next scan
+              continue; // Skip full tag reading and continue scan loop
+          }
+
+          Serial.println("Continuing with full tag read after fast-path check");
+
           uint16_t tagSize = readTagSize();
           if(tagSize > 0)
           {
@@ -1029,8 +1827,17 @@ void scanRfidTask(void * parameter) {
     else
     {
       nfcReadingTaskSuspendState = true;
-      Serial.println("NFC Reading disabled");
-      vTaskDelay(1000 / portTICK_PERIOD_MS);
+      
+      // Different behavior for write protection vs. full suspension
+      if (nfcWriteInProgress) {
+        // During write: Just pause scanning, don't disable NFC interface
+        // Serial.println("NFC Scanning paused during write operation");
+        vTaskDelay(100 / portTICK_PERIOD_MS); // Shorter delay during write
+      } else {
+        // Full suspension requested
+        Serial.println("NFC Reading disabled");
+        vTaskDelay(1000 / portTICK_PERIOD_MS);
+      }
     }
     yield();
   }

src/nfc.h

@@ -16,6 +16,7 @@ typedef enum{
 void startNfc();
 void scanRfidTask(void * parameter);
 void startWriteJsonToTag(const bool isSpoolTag, const char* payload);
+bool quickSpoolIdCheck(String uidString);
 
 extern TaskHandle_t RfidReaderTask;
 extern String nfcJsonData;
@@ -23,6 +24,7 @@ extern String activeSpoolId;
 extern String lastSpoolId;
 extern volatile nfcReaderStateType nfcReaderState;
 extern volatile bool pauseBambuMqttTask;
+extern volatile bool nfcWriteInProgress;
 extern bool tagProcessed;
 
 

src/scale.cpp

@@ -48,9 +48,6 @@ void scale_loop(void * parameter) {
   Serial.println("Scale Loop started");
   Serial.println("++++++++++++++++++++++++++++++");
 
-  vTaskDelay(pdMS_TO_TICKS(500));
-  scale_tare_counter = 10; // damit beim Starten der Waage automatisch getart wird
-  
   for(;;) {
     if (scale.is_ready()) 
     {
@@ -120,12 +117,13 @@ void start_scale(bool touchSensorConnected) {
     esp_task_wdt_reset();
   }
 
-  if (scale.wait_ready_timeout(1000))
-  {
-    scale.set_scale(calibrationValue); // this value is obtained by calibrating the scale with known weights; see the README for details
-    //scale.tare();
+  while(!scale.is_ready()) {
+    vTaskDelay(pdMS_TO_TICKS(5000));
   }
 
+  scale.set_scale(calibrationValue); // this value is obtained by calibrating the scale with known weights; see the README for details
+  scale.tare();
+
   // Display Gewicht
   oledShowWeight(0);