diff --git a/platformio.ini b/platformio.ini
index 3f2f9c0d..d64d1be7 100644
--- a/platformio.ini
+++ b/platformio.ini
@@ -30,7 +30,7 @@ description = Paxcounter is a proof-of-concept ESP32 device for metering passeng
 
 [common]
 ; for release_version use max. 10 chars total, use any decimal format like "a.b.c"
-release_version = 1.7.141
+release_version = 1.7.143
 ; DEBUG LEVEL: For production run set to 0, otherwise device will leak RAM while running!
 ; 0=None, 1=Error, 2=Warn, 3=Info, 4=Debug, 5=Verbose
 debug_level = 3
diff --git a/src/display.cpp b/src/display.cpp
index 7f9adbea..cf3207c7 100644
--- a/src/display.cpp
+++ b/src/display.cpp
@@ -139,6 +139,12 @@ void refreshtheDisplay() {
 
     uint8_t msgWaiting;
     char buff[16]; // 16 chars line buffer
+    const char timeNosyncSymbol = '?';
+#ifdef HAS_IF482
+    const char timesyncSymbol = '+';
+#else
+    const char timesyncSymbol = '*';
+#endif
 
     // update counter (lines 0-1)
     snprintf(
@@ -210,10 +216,15 @@ void refreshtheDisplay() {
 #else
     // update time/date display (line 6)
     time_t t = myTZ.toLocal(now());
+    char timeState =
+        timeStatus() == timeSet ? timesyncSymbol : timeNosyncSymbol;
+#ifdef RTC_INT // make timestatus symbol blinking
+    if (second(t) % 2)
+      timeState = ' ';
+#endif         // RTC_INT
     u8x8.printf("%02d:%02d:%02d%c %2d.%3s", hour(t), minute(t), second(t),
-                timeStatus() == timeSet ? '*' : '?', day(t),
-                printmonth[month(t)]);
-#endif
+                timeState, day(t), printmonth[month(t)]);
+#endif         // HAS_RTC
 
     // update LMiC event display (line 7)
     u8x8.setCursor(0, 7);
diff --git a/src/hal/ttgofox.h b/src/hal/ttgofox.h
index daff6a38..f7cd3033 100644
--- a/src/hal/ttgofox.h
+++ b/src/hal/ttgofox.h
@@ -25,11 +25,11 @@
 #define RTC_INT GPIO_NUM_34 // interrupt input from rtc
 
 // Settings for IF482 interface
-//#define HAS_IF482 9600, SERIAL_7E1, GPIO_NUM_12, GPIO_NUM_14 // IF482 serial port parameters
+#define HAS_IF482 9600, SERIAL_7E1, GPIO_NUM_12, GPIO_NUM_14 // IF482 serial port parameters
 
 // Settings for external GPS chip
-//#define HAS_GPS 1 // use on board GPS
-//#define GPS_SERIAL 9600, SERIAL_8N1, GPIO_NUM_17, GPIO_NUM_16 // UBlox NEO 6M or 7M with default configuration
+#define HAS_GPS 1 // use on board GPS
+#define GPS_SERIAL 9600, SERIAL_8N1, GPIO_NUM_17, GPIO_NUM_16 // UBlox NEO 6M or 7M with default configuration
 
 // Pins for LORA chip SPI interface, reset line and interrupt lines
 #define LORA_SCK  (5) 
diff --git a/src/if482.cpp b/src/if482.cpp
index 3914c7d2..f64e0c07 100644
--- a/src/if482.cpp
+++ b/src/if482.cpp
@@ -1,13 +1,14 @@
-#if defined HAS_IF482 && defined HAS_RTC
+#if defined HAS_IF482 && defined RTC_INT
 
 /* NOTE:
 The IF482 Generator needs an high precise 1 Hz clock signal which cannot be
 acquired in suitable precision on the ESP32 SoC itself. Additional clocking
 hardware is required, ususally the clock signal is generated by external RTC or
-GPS chip or a GPS chip which can generate a precise clock signal (+/- 2ppm). In
-this example code we use a Maxim DS3231 RTC chip, and configure it's interrupt
-output as clock output. The clock signal triggers an interrupt on the ESP32,
-which controls the realtime output of IF482 telegram. This is why code in
+GPS which can generate a precise time pulse signal (+/- 2ppm).
+
+In this example code we use a Maxim DS3231 RTC chip, and configure the chips's
+interrupt output pin as clock. The clock signal triggers an interrupt on the
+ESP32, which controls the realtime output of IF482 telegram. This is why code in
 IF482.cpp depends on code in RTCTIME.cpp.
 */
 
@@ -16,6 +17,7 @@ IF482.cpp depends on code in RTCTIME.cpp.
 /*
 IF482 Generator to control clocks with IF482 telegram input (e.g. BÜRK BU190)
    
+
 Example IF482 telegram: "OAL160806F170400"
 
 IF482 Specification:
diff --git a/src/lorawan.cpp b/src/lorawan.cpp
index fa53fdd7..654b1469 100644
--- a/src/lorawan.cpp
+++ b/src/lorawan.cpp
@@ -455,12 +455,9 @@ void user_request_network_time_callback(void *pVoidUserUTCTime,
 
   // Update system time with time read from the network
   setTime(*pUserUTCTime);
+  ESP_LOGI(TAG, "LoRaWAN network has set the system time");
 #ifdef HAS_RTC
-  if (!set_rtctime(*pUserUTCTime))
+  if (set_rtctime(*pUserUTCTime))
     ESP_LOGE(TAG, "RTC set time failure");
 #endif
-  time_t t = myTZ.toLocal(now());
-  ESP_LOGI(TAG,
-           "LORA Network has set system time to %02d/%02d/%d %02d:%02d:%02d",
-           month(t), day(t), year(t), hour(t), minute(t), second(t));
-}
+}
\ No newline at end of file
diff --git a/src/main.cpp b/src/main.cpp
index 64c50093..5703501f 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -197,7 +197,8 @@ void setup() {
     ESP_LOGI(TAG, "Unable to sync system time with RTC");
   else
     ESP_LOGI(TAG, "RTC has set the system time");
-  setSyncInterval(TIME_SYNC_INTERVAL_RTC);
+  setSyncInterval(TIME_SYNC_INTERVAL_RTC * 60);
+#endif // HAS_RTC
 
 #ifdef HAS_IF482
   strcat_P(features, " IF482");
@@ -212,8 +213,6 @@ void setup() {
                           0);          // CPU core
 #endif                                 // HAS_IF482
 
-#endif                                 // HAS_RTC
-
 // initialize wifi antenna
 #ifdef HAS_ANTENNA_SWITCH
   strcat_P(features, " ANT");
@@ -427,13 +426,18 @@ void setup() {
   setSyncProvider(&get_gpstime);
   if (timeStatus() != timeSet)
     ESP_LOGI(TAG, "Unable to sync system time with GPS");
-  else
+  else {
     ESP_LOGI(TAG, "GPS has set the system time");
-  setSyncInterval(TIME_SYNC_INTERVAL_GPS);
+#ifdef HAS_RTC
+    if (set_rtctime(now()))
+      ESP_LOGE(TAG, "RTC set time failure");
+#endif
+  }
+  setSyncInterval(TIME_SYNC_INTERVAL_GPS * 60);
 #endif
 
 // start RTC interrupt
-#if defined HAS_IF482 && defined HAS_RTC
+#if defined HAS_IF482 && defined RTC_INT
   // setup external interupt for active low RTC INT pin
   assert(IF482Task != NULL); // has if482loop task started?
   ESP_LOGI(TAG, "Starting IF482 output...");
diff --git a/src/paxcounter.conf b/src/paxcounter.conf
index 11151144..a97f8b9e 100644
--- a/src/paxcounter.conf
+++ b/src/paxcounter.conf
@@ -82,9 +82,9 @@
 #define RESPONSE_TIMEOUT_MS             60000   // firmware binary server connection timeout [milliseconds]
 
 // settings for syncing time of node and external time sources
-#define TIME_SYNC_INTERVAL_GPS          5       // sync time each ... minutes with GPS [default = 5], comment out means off          
-#define TIME_SYNC_INTERVAL_RTC          5       // sync time each ... minutes with RTC [default = 5], comment out means off          
-//#define TIME_SYNC_INTERVAL_LORA         60      // sync time each ... minutes with LORA network [default = 60], comment out means off          
+#define TIME_SYNC_INTERVAL_GPS          60      // sync time each ... minutes with GPS [default = 60], comment out means off          
+#define TIME_SYNC_INTERVAL_RTC          60      // sync time each ... minutes with RTC [default = 60], comment out means off          
+//#define TIME_SYNC_INTERVAL_LORA       60      // sync time each ... minutes with LORA network [default = 60], comment out means off          
 #define IF482_OFFSET                    984     // 1sec minus IF482 serial transmit time [ms]: e.g. 9 bits * 17 bytes * 1/9600 bps = 16ms
 
 // time zone, see https://github.com/JChristensen/Timezone/blob/master/examples/WorldClock/WorldClock.ino