linux/devices/GPSHyperionLinuxController.cpp

@@ -173,8 +173,19 @@ void GPSHyperionLinuxController::readGpsDataFromGpsd() {
   timeval time = {};
   time.tv_sec = gpsSet.unixSeconds.value;
   time.tv_usec = gps->fix.time.tv_nsec / 1000;
-  // Update the system time here for now. NTP seems to be unable to do so for whatever reason
-  settimeofday(&time, nullptr);
+  std::time_t t = std::time(nullptr);
+  if (time.tv_sec == t) {
+    timeIsConstantCounter++;
+  } else {
+    timeIsConstantCounter = 0;
+  }
+  // If the received time does not change anymore for whatever reason, do not set it here
+  // to avoid stale times
+  if(timeIsConstantCounter < 3) {
+    // Update the system time here for now. NTP seems to be unable to do so for whatever reason
+    settimeofday(&time, nullptr);
+  }
+
   Clock::TimeOfDay_t timeOfDay = {};
   Clock::convertTimevalToTimeOfDay(&time, &timeOfDay);
   gpsSet.year = timeOfDay.year;

linux/devices/GPSHyperionLinuxController.h

@@ -51,6 +51,7 @@ class GPSHyperionLinuxController : public ExtendedControllerBase {
   bool modeCommanded = true;
   gpsmm myGpsmm;
   bool debugHyperionGps = false;
+  uint32_t timeIsConstantCounter = 0;
 
   void readGpsDataFromGpsd();
 };