Update qdomyos-zwift.pri

src/android/src/Usbserial.java

@@ -48,9 +48,16 @@ public class Usbserial {
 
     public static void open(Context context, int baudRate) {
         QLog.d("QZ","UsbSerial open with baud rate: " + baudRate);
+
+        // DEBUG: List all USB devices detected by Android
+        UsbserialDebug.listAllUsbDevices(context);
+
         // Find all available drivers from attached devices.
         UsbManager manager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
         List<UsbSerialDriver> availableDrivers = UsbSerialProber.getDefaultProber().findAllDrivers(manager);
+
+        QLog.d("QZ","UsbSerial drivers found by UsbSerialProber: " + availableDrivers.size());
+
         if (availableDrivers.isEmpty()) {
             QLog.d("QZ","UsbSerial no available drivers");
             return;
@@ -73,12 +80,20 @@ public class Usbserial {
             int flags = Build.VERSION.SDK_INT >= Build.VERSION_CODES.M ? PendingIntent.FLAG_IMMUTABLE : 0;
             PendingIntent permissionIntent = PendingIntent.getBroadcast(context, 0, new Intent("org.cagnulen.qdomyoszwift.USB_PERMISSION"), flags);
             IntentFilter filter = new IntentFilter("org.cagnulen.qdomyoszwift.USB_PERMISSION");
-            ContextCompat.registerReceiver(
-                    context,
-                    usbReceiver,
-                    filter,
-                    ContextCompat.RECEIVER_EXPORTED
-                );
+
+            // Fix for Android 6 compatibility: RECEIVER_EXPORTED only available in Android 13+
+            if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+                ContextCompat.registerReceiver(
+                        context,
+                        usbReceiver,
+                        filter,
+                        ContextCompat.RECEIVER_EXPORTED
+                    );
+            } else {
+                // Use old API for Android 6-12
+                context.registerReceiver(usbReceiver, filter);
+            }
+
             manager.requestPermission(driver.getDevice(), permissionIntent);
             for(int i=0; i<5000; i++) {
                 if(granted[0] != null) break;

src/android/src/UsbserialDebug.java

@@ -0,0 +1,31 @@
+package org.cagnulen.qdomyoszwift;
+
+import android.content.Context;
+import android.hardware.usb.UsbDevice;
+import android.hardware.usb.UsbManager;
+import java.util.HashMap;
+
+public class UsbserialDebug {
+
+    public static void listAllUsbDevices(Context context) {
+        QLog.d("QZ", "=== USB DEVICE DEBUG START ===");
+        UsbManager manager = (UsbManager) context.getSystemService(Context.USB_SERVICE);
+        HashMap<String, UsbDevice> deviceList = manager.getDeviceList();
+
+        QLog.d("QZ", "Total USB devices found: " + deviceList.size());
+
+        for (UsbDevice device : deviceList.values()) {
+            QLog.d("QZ", "----------------------------");
+            QLog.d("QZ", "Device Name: " + device.getDeviceName());
+            QLog.d("QZ", "Vendor ID: " + device.getVendorId() + " (0x" + Integer.toHexString(device.getVendorId()) + ")");
+            QLog.d("QZ", "Product ID: " + device.getProductId() + " (0x" + Integer.toHexString(device.getProductId()) + ")");
+            QLog.d("QZ", "Device Class: " + device.getDeviceClass());
+            QLog.d("QZ", "Device Subclass: " + device.getDeviceSubclass());
+            QLog.d("QZ", "Device Protocol: " + device.getDeviceProtocol());
+            QLog.d("QZ", "Has Permission: " + manager.hasPermission(device));
+            QLog.d("QZ", "Interface Count: " + device.getInterfaceCount());
+        }
+
+        QLog.d("QZ", "=== USB DEVICE DEBUG END ===");
+    }
+}

src/qdomyos-zwift.pri

@@ -920,6 +920,7 @@ DISTFILES += \
 	android/src/SpeedChannelController.java \
    android/src/SDMChannelController.java \
     android/src/Usbserial.java \
+    android/src/UsbserialDebug.java \
    android/src/com/cgutman/adblib/AdbBase64.java \
    android/src/com/cgutman/adblib/AdbConnection.java \
    android/src/com/cgutman/adblib/AdbCrypto.java \