diff --git a/config.h b/config.h
index 1ad9efa..7c28905 100644
--- a/config.h
+++ b/config.h
@@ -60,7 +60,7 @@
 //
 // Information about memory layout, etc.: https://www.pjrc.com/store/teensy41.html
 
-#define VERSION "1.2.9"
+#define VERSION "1.2.10"
 
 //*************************************************************************************************
 //* DEVICE SETTINGS
@@ -71,10 +71,11 @@
 //*************************************************************************************************
 #define MIDI_DEVICE_DIN Serial1
 #define MIDI_DEVICE_USB 1
-//#define MIDI_DEVICE_USB_HOST 1
+#define MIDI_DEVICE_USB_HOST 1
 #define MIDI_DEVICE_USB_HOST_SERIAL 1
 
 #ifdef MIDI_DEVICE_USB_HOST_SERIAL
+#define NUM_HUBS_MIDI_DEVICE_USB_HOST_SERIAL 4 // 0..4 - needed, if you want to connect a USB-HUB wit hup to 4 devices to the USB-HOST port
 #define USB_HOST_SERIAL_BAUD 38400
 #define USB_HOST_SERIAL_FORMAT USBHOST_SERIAL_8N1
 #endif
diff --git a/midi_devices.hpp b/midi_devices.hpp
index 70cd2c9..18a327f 100644
--- a/midi_devices.hpp
+++ b/midi_devices.hpp
@@ -58,10 +58,15 @@ USBHost usb_host;
 MIDIDevice midi_usb(usb_host);
 #endif
 #ifdef MIDI_DEVICE_USB_HOST_SERIAL
+#if NUM_HUBS_MIDI_DEVICE_USB_HOST_SERIAL < 2
 USBHub hub1(usb_host);
+#elif NUM_HUBS_MIDI_DEVICE_USB_HOST_SERIAL < 3
 USBHub hub2(usb_host);
+#elif NUM_HUBS_MIDI_DEVICE_USB_HOST_SERIAL < 4
 USBHub hub3(usb_host);
+#elif NUM_HUBS_MIDI_DEVICE_USB_HOST_SERIAL < 5
 USBHub hub4(usb_host);
+#endif
 USBSerial_BigBuffer userial(usb_host,1);
 MIDI_NAMESPACE::SerialMIDI<USBSerial_BigBuffer, CustomBaudRateSettings> serialMIDI(userial);
 MIDI_NAMESPACE::MidiInterface<MIDI_NAMESPACE::SerialMIDI<USBSerial_BigBuffer, CustomBaudRateSettings>> usbhost_midi_serial((MIDI_NAMESPACE::SerialMIDI<USBSerial_BigBuffer, CustomBaudRateSettings>&)serialMIDI);