diff --git a/scratch_link.py b/scratch_link.py
index d39066a..191e8a6 100755
--- a/scratch_link.py
+++ b/scratch_link.py
@@ -513,17 +513,7 @@ class BLESession(Session):
                 message = base64.standard_b64encode(b).decode('ascii')
                 res['result'] = { 'message': message, 'encode': 'base64' }
             if params.get('startNotifications') == True:
-                logger.debug(f"start notification for {chara_id}")
-                service = self.perip.getServiceByUUID(UUID(service_id))
-                chas = service.getCharacteristics(forUUID=chara_id)
-                handle = chas[0].getHandle()
-                # prepare notification handler
-                self.delegate.add_handle(service_id, chara_id, handle)
-                # request notification to the BLE device
-                self.lock.acquire()
-                self.perip.writeCharacteristic(chas[0].getHandle() + 1,
-                                               b"\x01\x00", True)
-                self.lock.release()
+                self.startNotifications(service_id, chara_id)
 
         elif self.status == self.CONNECTED and method == 'write':
             logger.debug("handle write request")
@@ -548,6 +538,19 @@ class BLESession(Session):
         logger.debug(res)
         return res
 
+    def startNotifications(self, service_id, chara_id):
+        logger.debug(f"start notification for {chara_id}")
+        service = self.perip.getServiceByUUID(UUID(service_id))
+        chas = service.getCharacteristics(forUUID=chara_id)
+        handle = chas[0].getHandle()
+        # prepare notification handler
+        self.delegate.add_handle(service_id, chara_id, handle)
+        # request notification to the BLE device
+        self.lock.acquire()
+        self.perip.writeCharacteristic(chas[0].getHandle() + 1,
+                                       b"\x01\x00", True)
+        self.lock.release()
+
     def end_request(self):
         logger.debug("end_request of BLESession")
         if self.delegate: