diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..19c896d
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,7 @@
+################################################################################
+# Diese .gitignore-Datei wurde von Microsoft(R) Visual Studio automatisch erstellt.
+################################################################################
+
+/.vs/sonos/v16/.suo
+/.vs/ProjectSettings.json
+/.vs/slnx.sqlite
diff --git a/src/SonosUPnP.cpp b/src/SonosUPnP.cpp
index 4700511..f6cd2d0 100644
--- a/src/SonosUPnP.cpp
+++ b/src/SonosUPnP.cpp
@@ -59,6 +59,7 @@ const char p_RadioMetaFullStart[] PROGMEM = SONOS_RADIO_META_FULL_START;
 const char p_RadioMetaFullEnd[] PROGMEM = SONOS_RADIO_META_FULL_END;
 const char p_BecomeCoordinatorOfStandaloneGroup[] PROGMEM = SONOS_TAG_BECOME_COORDINATOR_OF_STANDALONE_GROUP;
 const char p_SetLEDState[] PROGMEM = SONOS_TAG_SET_LED_STATE;
+const char p_ConfigureSleepTimer[] PROGMEM = SONOS_TAG_CONFIGURE_SLEEP_TIMER;
 
 const char p_AddURIToQueue[] PROGMEM = SONOS_TAG_ADD_URI_TO_QUEUE;
 const char p_SavedQueues[] PROGMEM = SONOS_SAVED_QUEUES;
@@ -282,6 +283,12 @@ void SonosUPnP::setStatusLight(IPAddress speakerIP, bool state)
     SONOS_TAG_DESIRED_LED_STATE, state ? "On" : "Off");
 }
 
+void SonosUPnP::NewSleepTimerDuration(IPAddress speakerIP, uint8_t hour, uint8_t minute, uint8_t second)
+{
+	char time[11];
+	sprintf_P(time, p_TimeFormatTemplate, hour, minute, second);
+	upnpSet(speakerIP, UPNP_AV_TRANSPORT, p_ConfigureSleepTimer, SONOS_TAG_NEW_SLEEP_TIMER_DURATION, time);
+
 void SonosUPnP::addPlaylistToQueue(IPAddress speakerIP, uint16_t playlistIndex)
 {
   char path[45];
diff --git a/src/SonosUPnP.h b/src/SonosUPnP.h
index bfce396..49adc7e 100644
--- a/src/SonosUPnP.h
+++ b/src/SonosUPnP.h
@@ -123,6 +123,9 @@
 #define SONOS_TAG_SET_LED_STATE "SetLEDState"
 #define SONOS_TAG_DESIRED_LED_STATE "DesiredLEDState"
 
+#define SONOS_TAG_CONFIGURE_SLEEP_TIMER "ConfigureSleepTimer"
+#define SONOS_TAG_NEW_SLEEP_TIMER_DURATION "NewSleepTimerDuration"
+
 // Playlist & Queue
 /*
 <u:AddURIToQueueResponse xmlns:u="urn:schemas-upnp-org:service:AVTransport:1">
@@ -307,6 +310,7 @@ class SonosUPnP
     void addPlaylistToQueue(IPAddress speakerIP, uint16_t playlistIndex);
     void addTrackToQueue(IPAddress speakerIP, const char *scheme, const char *address);
     void removeAllTracksFromQueue(IPAddress speakerIP);
+	void NewSleepTimerDuration(IPAddress speakerIP, uint8_t hour, uint8_t minute, uint8_t second);
     
     #ifndef SONOS_WRITE_ONLY_MODE