diff --git a/src/cyclic.cpp b/src/cyclic.cpp
index 45bac2f2..42556acf 100644
--- a/src/cyclic.cpp
+++ b/src/cyclic.cpp
@@ -34,6 +34,7 @@ void doHousekeeping() {
   if (rcmdTask != NULL)
     ESP_LOGD(TAG, "Rcommand interpreter %d bytes left | Taskstate = %d",
              uxTaskGetStackHighWaterMark(rcmdTask), eTaskGetState(rcmdTask));
+
 #if (HAS_LORA)
   if (lmicTask != NULL)
     ESP_LOGD(TAG, "LMiCtask %d bytes left | Taskstate = %d",
@@ -43,11 +44,18 @@ void doHousekeeping() {
              uxTaskGetStackHighWaterMark(lorasendTask),
              eTaskGetState(lorasendTask));
 #endif
+
 #if (HAS_GPS)
   if (GpsTask != NULL)
     ESP_LOGD(TAG, "Gpsloop %d bytes left | Taskstate = %d",
              uxTaskGetStackHighWaterMark(GpsTask), eTaskGetState(GpsTask));
+  // (only) while device time is not set or unsynched, and we have a valid
+  // GPS time, we call calibrateTime to poll time immeditately from GPS
+  if ((timeSource == _unsynced || timeSource == _set) &&
+      (gpstime.isUpdated() && gpstime.isValid() && gpstime.age() < 1000))
+    calibrateTime();
 #endif
+
 #ifdef HAS_SPI
   if (spiTask != NULL)
     ESP_LOGD(TAG, "spiloop %d bytes left | Taskstate = %d",
diff --git a/src/gpsread.cpp b/src/gpsread.cpp
index aecef475..6aef95b0 100644
--- a/src/gpsread.cpp
+++ b/src/gpsread.cpp
@@ -273,23 +273,17 @@ void gps_loop(void *pvParameters) {
       // feed GPS decoder with serial NMEA data from GPS device
       while (GPS_Serial.available())
         if (gps.encode(GPS_Serial.read()))
-          break; // NMEA sentence complete
-
-      // (only) while device time is not set or unsynched, and we have a valid
-      // GPS time, we call calibrateTime to poll time immeditately from GPS
-      if ((timeSource == _unsynced || timeSource == _set) &&
-          (gpstime.isUpdated() && gpstime.isValid() && gpstime.age() < 1000))
-        calibrateTime();
+          break; // leave encode loop after each NMEA complete sentence
 
       // show NMEA data, very noisy,  useful only for debugging GPS
       // ESP_LOGV(TAG, "GPS NMEA data: passed %u / failed: %u / with fix:
       //                  %u", gps.passedChecksum(), gps.failedChecksum(), gps
       //                       .sentencesWithFix());
 
-      delay(2);
+      delay(5);
     } // inner while loop
 
-    delay(2);
+    delay(1000);
   } // outer while loop
 
 } // gps_loop()
diff --git a/src/lorawan.cpp b/src/lorawan.cpp
index 403cf19f..ab5b2fe7 100644
--- a/src/lorawan.cpp
+++ b/src/lorawan.cpp
@@ -305,7 +305,7 @@ esp_err_t lmic_init(void) {
                           "lmictask", // name of task
                           4096,       // stack size of task
                           (void *)1,  // parameter of the task
-                          8,          // priority of the task
+                          1,          // priority of the task
                           &lmicTask,  // task handle
                           1);         // CPU core
 
diff --git a/src/main.cpp b/src/main.cpp
index 9cd922fc..b1d12fbb 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -29,16 +29,16 @@ Task          	Core  Prio  Purpose
 -------------------------------------------------------------------------------
 ledloop*      	0     1    blinks LEDs
 spiloop#      	0     2    reads/writes data on spi interface
-lmictask*     	1     8    MCCI LMiC LORAWAN stack
+lmictask*     	1     1    MCCI LMiC LORAWAN stack
 clockloop#    	1     6    generates realtime telegrams for external clock
 mqttloop#     	1     5    reads/writes data on ETH interface
 timesync_proc#	1     7    processes realtime time sync requests
-irqhandler#   	1     4    cyclic tasks (i.e. displayrefresh) triggered by
-gpsloop*      	1     3    reads data from GPS via serial or i2c
+irqhandler#   	1     4    application IRQ (i.e. displayrefresh)
+gpsloop*      	1     1    reads data from GPS via serial or i2c
 lorasendtask# 	1     2    feeds data from lora sendqueue to lmcic
 rmcd_process# 	1     1    Remote command interpreter loop
 
-* spinning task
+* spinning task, always ready
 # blocked/waiting task
 
 Low priority numbers denote low priority tasks.
@@ -322,7 +322,7 @@ void setup() {
                             "gpsloop", // name of task
                             8192,      // stack size of task
                             (void *)1, // parameter of the task
-                            3,         // priority of the task
+                            1,         // priority of the task
                             &GpsTask,  // task handle
                             1);        // CPU core
   }
diff --git a/src/rcommand.cpp b/src/rcommand.cpp
index ecaadca7..fe333b1f 100644
--- a/src/rcommand.cpp
+++ b/src/rcommand.cpp
@@ -484,7 +484,7 @@ void rcmd_process(void *pvParameters) {
     rcmd_execute(RcmdBuffer.cmd, RcmdBuffer.cmdLen);
   }
 
-  delay(2); // yield to CPU
+  delay(5); // yield to CPU
 } // rcmd_process()
 
 // enqueue remote command