diff --git a/app/src/main/java/com/bitchat/android/mesh/BluetoothGattServerManager.kt b/app/src/main/java/com/bitchat/android/mesh/BluetoothGattServerManager.kt
index 37c9ebfd..093903fa 100644
--- a/app/src/main/java/com/bitchat/android/mesh/BluetoothGattServerManager.kt
+++ b/app/src/main/java/com/bitchat/android/mesh/BluetoothGattServerManager.kt
@@ -29,7 +29,7 @@ class BluetoothGattServerManager(
     companion object {
         private const val TAG = "BluetoothGattServerManager"
         // Use exact same UUIDs as iOS version
-        private val SERVICE_UUID = UUID.fromString("F47B5E2D-4A9E-4C5A-9B3F-8E1D2C3A4B5C")
+        private val SERVICE_UUID = UUID.fromString("F47B5E2D-4A9E-4C5A-9B3F-8E1D2C3A4B5B")
         private val CHARACTERISTIC_UUID = UUID.fromString("A1B2C3D4-E5F6-4A5B-8C9D-0E1F2A3B4C5D")
         private val DESCRIPTOR_UUID = UUID.fromString("00002902-0000-1000-8000-00805f9b34fb")
     }
diff --git a/app/src/main/java/com/bitchat/android/mesh/BluetoothMeshService.kt b/app/src/main/java/com/bitchat/android/mesh/BluetoothMeshService.kt
index ac1f8fbc..ecb3748c 100644
--- a/app/src/main/java/com/bitchat/android/mesh/BluetoothMeshService.kt
+++ b/app/src/main/java/com/bitchat/android/mesh/BluetoothMeshService.kt
@@ -37,17 +37,17 @@ class BluetoothMeshService(private val context: Context) {
     }
     
     // My peer identification - same format as iOS
-        val myPeerID: ByteArray = generateCompatiblePeerID()
+    val myPeerID: String = generateCompatiblePeerID()
     
     // Core components - each handling specific responsibilities
     private val encryptionService = EncryptionService(context)
     private val peerManager = PeerManager()
     private val fragmentManager = FragmentManager()
-        private val securityManager = SecurityManager(encryptionService, myPeerID.toHexString())
+    private val securityManager = SecurityManager(encryptionService, myPeerID)
     private val storeForwardManager = StoreForwardManager()
-        private val messageHandler = MessageHandler(myPeerID.toHexString())
-        internal val connectionManager = BluetoothConnectionManager(context, myPeerID.toHexString(), fragmentManager) // Made internal for access
-        private val packetProcessor = PacketProcessor(myPeerID.toHexString())
+    private val messageHandler = MessageHandler(myPeerID)
+    internal val connectionManager = BluetoothConnectionManager(context, myPeerID, fragmentManager) // Made internal for access
+    private val packetProcessor = PacketProcessor(myPeerID)
     
     // Service state management
     private var isActive = false
@@ -419,6 +419,7 @@ class BluetoothMeshService(private val context: Context) {
                 val signature = securityManager.signPacket(messageData)
                 
                 val packet = BitchatPacket(
+                    version = 1u,
                     type = MessageType.MESSAGE.value,
                     senderID = myPeerID.toByteArray(),
                     recipientID = SpecialRecipients.BROADCAST,
@@ -467,6 +468,7 @@ class BluetoothMeshService(private val context: Context) {
                         val signature = securityManager.signPacket(encryptedPayload)
                         
                         val packet = BitchatPacket(
+                            version = 1u,
                             type = MessageType.MESSAGE.value,
                             senderID = myPeerID.toByteArray(),
                             recipientID = recipientPeerID.toByteArray(),
@@ -626,10 +628,10 @@ class BluetoothMeshService(private val context: Context) {
     /**
      * Generate peer ID compatible with iOS
      */
-        private fun generateCompatiblePeerID(): ByteArray {
+    private fun generateCompatiblePeerID(): String {
         val randomBytes = ByteArray(4)
         Random.nextBytes(randomBytes)
-        return randomBytes
+        return randomBytes.joinToString("") { "%02x".format(it) }
     }
 }
 
diff --git a/app/src/main/java/com/bitchat/android/protocol/BinaryProtocol.kt b/app/src/main/java/com/bitchat/android/protocol/BinaryProtocol.kt
index 6aaf5217..7a315b57 100644
--- a/app/src/main/java/com/bitchat/android/protocol/BinaryProtocol.kt
+++ b/app/src/main/java/com/bitchat/android/protocol/BinaryProtocol.kt
@@ -80,8 +80,6 @@ data class BitchatPacket(
     var ttl: UByte
 ) : Parcelable {
 
-    // Secondary constructor removed to enforce ByteArray usage for peerIDs
-    /*
     constructor(
         type: UByte,
         ttl: UByte,
@@ -97,7 +95,6 @@ data class BitchatPacket(
         signature = null,
         ttl = ttl
     )
-    */
 
     fun toBinaryData(): ByteArray? {
         return BinaryProtocol.encode(this)