diff --git a/mini-beieli-node.ino b/mini-beieli-node.ino
index 4863d85..0ce8238 100644
--- a/mini-beieli-node.ino
+++ b/mini-beieli-node.ino
@@ -93,6 +93,7 @@ LORA_data_first lora_data_first;
 CONFIG_data config_data;
 SENSOR_data last_sensor_reading;
 long iteration = 0;      // what iteration number do we have, starts with 0
+bool send_in_progress = false;
 
 // generic timer
 long t_cur;
@@ -226,7 +227,11 @@ void setup_platform(void)
   // set up the LED
   gLed.begin();
   gCatena.registerObject(&gLed);
-  gLed.Set(LedPattern::FastFlash);
+  gLed.Set(LedPattern::Off);
+
+  if (config_data.debug_level > 1) {
+    gLed.Set(LedPattern::FastFlash);
+  }
 
   // set up LoRaWAN
   gCatena.SafePrintf("LoRaWAN init: ");
@@ -354,7 +359,9 @@ void setup_uplink(void)
     if (!gLoRaWAN.IsProvisioned())
       gCatena.SafePrintf("%010d - LoRaWAN not provisioned yet. Use the commands to set it up.\n");
     else {
-      gLed.Set(LedPattern::Joining);
+      if (config_data.debug_level > 1) {
+        gLed.Set(LedPattern::Joining);
+      }
 
       /* trigger a join by sending the first packet */
       StartNewIteration();
@@ -481,14 +488,16 @@ uint8_t GetVBatValue(int millivolts)
   return res;
 }
 
-void DoDeepSleep()
+void DoDeepSleep(uint32_t sleep_time)
 {
   if (config_data.debug_level > 0) {
     gCatena.SafePrintf("%010d - now going to deep sleep\n", millis());
   }
 
   // Prepare Deep Sleep
-  gLed.Set(LedPattern::Off);
+  if (config_data.debug_level > 1) {
+    gLed.Set(LedPattern::Off);
+  }
 
   Serial.end();
   Wire.end();
@@ -497,7 +506,7 @@ void DoDeepSleep()
     gSPI2.end();
 
   // Now sleeping...
-  gCatena.Sleep(CATCFG_T_INTERVAL);
+  gCatena.Sleep(sleep_time);
 
   // Recover from wakeup...
   Serial.begin();
@@ -589,6 +598,8 @@ void ReadSensors(SENSOR_data &sensor_data) {
 }
 
 void StartNewIteration() {
+  uint32_t wait_time;
+
   // we increment the iteration counter
   iteration++;
 
@@ -649,16 +660,24 @@ void StartNewIteration() {
       gCatena.SafePrintf("%010d - startSendingUplink(), my_position: %d, iteration: %d\n", millis(), my_position, iteration);
     }
     startSendingUplink(iteration == 1);
-    gLed.Set(LedPattern::TwoShort);
+    if (config_data.debug_level > 1) {
+      gLed.Set(LedPattern::TwoShort);
+    }
 
-    // If we have any critical jobs to complete in the next 8 seconds, do not sleep but process them
-    long loopCount = 0;
-    while (os_queryTimeCriticalJobs(ms2osticks(8000)) != 0)
+    // Loop while sending is in progress, timeout just in case after 300 seconds
+    long start_time = millis();
+    if (config_data.debug_level > 0) {
+      gCatena.SafePrintf("%010d - waiting while send is in progress\n", millis());
+    }
+    while (send_in_progress && ((millis() - start_time) < 300000))
     {
-      loopCount++;
       gCatena.poll();
       yield();
     }
+    wait_time = (uint32_t)((millis() - start_time) / 1000);
+    if (config_data.debug_level > 0) {
+      gCatena.SafePrintf("%010d - end waiting, wait time was %d seconds\n", millis(), wait_time);
+    }
   }
 
   if (iteration > 1) {
@@ -674,10 +693,18 @@ void StartNewIteration() {
       gCatena.SafePrintf("USB Power is off\n");
     }
     //Serial.flush();
+    if (config_data.debug_level > 1) {
+      gLed.Set(LedPattern::Sleeping);
+    }
+  }
+  uint32_t sleep_time_sec;
+  if ((wait_time + 2) < CATCFG_T_INTERVAL) {
+    sleep_time_sec = CATCFG_T_INTERVAL - wait_time - 2;
+  } else {
+    sleep_time_sec = 0;
   }
-  gLed.Set(LedPattern::Sleeping);
   if (!fUsbPower) {
-    DoDeepSleep();
+    DoDeepSleep(sleep_time_sec);
     os_setTimedCallback(
       &iterationJob,
       os_getTime() + sec2osticks(2),
@@ -687,19 +714,24 @@ void StartNewIteration() {
     gCatena.SafePrintf("%010d - light sleep; os_setTimedCallback for startNewIterationCb in %d...\n", millis(), CATCFG_T_INTERVAL);
     os_setTimedCallback(
       &iterationJob,
-      os_getTime() + sec2osticks(CATCFG_T_INTERVAL),
+      os_getTime() + sec2osticks(sleep_time_sec),
       startNewIterationCb);
   }
 }
 
 void startSendingUplink(bool firstTime)
 {
-  LedPattern savedLed = gLed.Set(LedPattern::Measuring);
+  LedPattern savedLed;
+  if (config_data.debug_level > 1) {
+    savedLed = gLed.Set(LedPattern::Measuring);
+  }
 
-  if (savedLed != LedPattern::Joining)
-    gLed.Set(LedPattern::Sending);
-  else
-    gLed.Set(LedPattern::Joining);
+  if (config_data.debug_level > 1) {
+    if (savedLed != LedPattern::Joining)
+      gLed.Set(LedPattern::Sending);
+    else
+      gLed.Set(LedPattern::Joining);
+  }
 
   bool fConfirmed = false;
   if (gCatena.GetOperatingFlags() & (1 << 16)) {
@@ -714,11 +746,14 @@ void startSendingUplink(bool firstTime)
       gCatena.SafePrintf("%010d - SendBuffer firstTime\n", millis());
     }
     gLoRaWAN.SendBuffer((uint8_t*)&lora_data_first, sizeof(LORA_data_first), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort);
+    send_in_progress = true;
+
   } else {
     if (config_data.debug_level > 0) {
       gCatena.SafePrintf("%010d - SendBuffer not firstTime\n", millis());
     }
     gLoRaWAN.SendBuffer((uint8_t*)&lora_data, sizeof(LORA_data), sendBufferDoneCb, NULL, fConfirmed, kUplinkPort);
+    send_in_progress = true;
   }
   ClearLoraData();
 }
@@ -729,7 +764,9 @@ static void sendBufferDoneCb(
 {
   osjobcb_t pFn;
 
-  gLed.Set(LedPattern::Settling);
+  if (config_data.debug_level > 1) {
+    gLed.Set(LedPattern::Settling);
+  }
 
   pFn = settleDoneCb;
   if (! fStatus)
@@ -762,7 +799,9 @@ static void txNotProvisionedCb(
     gCatena.SafePrintf("LoRaWAN not provisioned yet. Use the commands to set it up.\n");
   }
   gLoRaWAN.Shutdown();
-  gLed.Set(LedPattern::NotProvisioned);
+  if (config_data.debug_level > 1) {
+    gLed.Set(LedPattern::NotProvisioned);
+  }
 }
 
 
@@ -787,7 +826,9 @@ static void settleDoneCb(
 
 static void sleepDoneCb(osjob_t* pJob)
 {
-  gLed.Set(LedPattern::WarmingUp);
+  if (config_data.debug_level > 1) {
+    gLed.Set(LedPattern::WarmingUp);
+  }
 
   if (config_data.debug_level > 0) {
     gCatena.SafePrintf("%010d - sleepDoneCb\n", millis());
@@ -804,6 +845,7 @@ static void warmupDoneCb(osjob_t* pJob)
   if (config_data.debug_level > 0) {
     gCatena.SafePrintf("%010d - warmupDoneCb\n", millis());
   }
+  send_in_progress = false;
 }
 
 static void startNewIterationCb(osjob_t* pJob)
diff --git a/mini_beieli_node.h b/mini_beieli_node.h
index e80f553..6bf1a62 100644
--- a/mini_beieli_node.h
+++ b/mini_beieli_node.h
@@ -55,7 +55,7 @@ enum {
   |
   \****************************************************************************/
 
-static const int32_t fwVersion = 20191120;
+static const int32_t fwVersion = 20191121;
 static const byte MAX_VALUES_TO_SEND = 8;
 //static const byte MAX_VALUES_TO_SEND = 1;  // Testing
 static const uint8_t LORA_DATA_VERSION = 1;
@@ -69,7 +69,7 @@ typedef struct {
   long cal_w2_0;                                     // 4 Bytes, Wert Waegezelle 2 ohne Gewicht
   float cal_w1_factor;                               // 4 Bytes, Kalibrationsfaktor Waegezelle 1
   float cal_w2_factor;                               // 4 Bytes, Kalibrationsfaktor Waegezelle 2
-  byte debug_level;                                  // 0 => no debugging, 1 => infos, 2 => error, 3 => highest level
+  byte debug_level;                                  // 0 => no debugging, no led, 1 => infos, no led, 2 => infos, 3 => error, 4 => highest level
   byte fill[122];
 } __attribute__((packed)) CONFIG_data;