diff --git a/src/ble_midi_transport.cpp b/src/ble_midi_transport.cpp
index 2872fc9..588dd3a 100644
--- a/src/ble_midi_transport.cpp
+++ b/src/ble_midi_transport.cpp
@@ -13,11 +13,11 @@ static NimBLECharacteristic* ble_char = nullptr;
 static bool device_connected = false;
 
 class ServerCallbacks : public NimBLEServerCallbacks {
-    void onConnect(NimBLEServer* server) override {
+    void onConnect(NimBLEServer* server, NimBLEConnInfo&) override {
         device_connected = true;
         Serial.println("[BLE] Client connected");
     }
-    void onDisconnect(NimBLEServer* server) override {
+    void onDisconnect(NimBLEServer* server, NimBLEConnInfo&, int) override {
         device_connected = false;
         Serial.println("[BLE] Client disconnected, restarting advertising");
         NimBLEDevice::startAdvertising();
@@ -25,7 +25,7 @@ class ServerCallbacks : public NimBLEServerCallbacks {
 };
 
 class CharCallbacks : public NimBLECharacteristicCallbacks {
-    void onWrite(NimBLECharacteristic* characteristic) override {
+    void onWrite(NimBLECharacteristic* characteristic, NimBLEConnInfo&) override {
         std::string value = characteristic->getValue();
         if (value.length() > 0 && instance) {
             instance->on_receive((const uint8_t*)value.data(), value.length());
@@ -83,9 +83,7 @@ bool BleMidiTransport::begin() {
     ble_char->setCallbacks(new CharCallbacks());
     Serial.println("[BLE] Callbacks set");
 
-    Serial.println("[BLE] Starting service...");
-    ble_service->start();
-    Serial.println("[BLE] Service started");
+    Serial.println("[BLE] Service created (auto-starts with server)");
 
     Serial.println("[BLE] Starting advertising...");
     NimBLEAdvertising* adv = NimBLEDevice::getAdvertising();