diff --git a/tuhi/base.py b/tuhi/base.py
index 6da96d7..ba9f2e7 100644
--- a/tuhi/base.py
+++ b/tuhi/base.py
@@ -167,7 +167,10 @@ class TuhiDevice(GObject.Object):
         self._tuhi_dbus_device.notify_button_press_required()
 
     def _on_uuid_updated(self, wacom_device, pspec, bluez_device):
-        self.config.new_device(bluez_device.address, wacom_device.uuid)
+        protocol = TuhiConfig.Protocol.SLATE
+        if wacom_device.is_spark():
+            protocol = TuhiConfig.Protocol.SPARK
+        self.config.new_device(bluez_device.address, wacom_device.uuid, protocol)
         self.registered = True
 
     def _on_listening_updated(self, dbus_device, pspec):
@@ -287,7 +290,7 @@ class Tuhi(GObject.Object):
             if uuid is None:
                 logger.info(f'{bluez_device.address}: device without config, must be registered first')
                 return
-            logger.debug(f'{bluez_device.address}: UUID {uuid}')
+            logger.debug(f'{bluez_device.address}: UUID {uuid} protocol: {config["Protocol"]}')
 
         # create the device if unknown from us
         if bluez_device.address not in self.devices:
diff --git a/tuhi/config.py b/tuhi/config.py
index 8be0bed..4995b75 100644
--- a/tuhi/config.py
+++ b/tuhi/config.py
@@ -16,6 +16,7 @@ from gi.repository import GObject
 import xdg.BaseDirectory
 import os
 import configparser
+import enum
 import re
 import logging
 from .drawing import Drawing
@@ -30,6 +31,13 @@ def is_btaddr(addr):
 
 
 class TuhiConfig(GObject.Object):
+
+    class Protocol(enum.Enum):
+        UNKNOWN = 0
+        SPARK = 1
+        SLATE = 2
+        INTUOS_PRO = 3
+
     def __init__(self):
         GObject.Object.__init__(self)
         try:
@@ -67,9 +75,11 @@ class TuhiConfig(GObject.Object):
                 self._purge_drawings(entry)
 
                 assert config['Device']['Address'] == entry.name
+                if 'Protocol' not in config['Device']:
+                    config['Device']['Protocol'] = str(TuhiConfig.Protocol.UNKNOWN)
                 self._devices[entry.name] = config['Device']
 
-    def new_device(self, address, uuid):
+    def new_device(self, address, uuid, protocol):
         assert is_btaddr(address)
         assert len(uuid) == 12
 
@@ -92,6 +102,7 @@ class TuhiConfig(GObject.Object):
         config['Device'] = {
             'Address': address,
             'UUID': uuid,
+            'Protocol': protocol,
         }
 
         with open(path, 'w') as configfile: