Adding access to the vehicle hobbs meter

src/Vehicle/Vehicle.cc

@@ -2873,6 +2873,25 @@ void Vehicle::sendPlan(QString planFile)
     PlanMasterController::sendPlanToVehicle(this, planFile);
 }
 
+QString Vehicle::hobbsMeter()
+{
+    static const char* HOOBS_HI = "LND_FLIGHT_T_HI";
+    static const char* HOOBS_LO = "LND_FLIGHT_T_LO";
+    //-- TODO: Does this exist on non PX4?
+    if (_parameterManager->parameterExists(FactSystem::defaultComponentId, HOOBS_HI) &&
+        _parameterManager->parameterExists(FactSystem::defaultComponentId, HOOBS_LO)) {
+        Fact* factHi = _parameterManager->getParameter(FactSystem::defaultComponentId, HOOBS_HI);
+        Fact* factLo = _parameterManager->getParameter(FactSystem::defaultComponentId, HOOBS_LO);
+        uint64_t hobbsTimeSeconds = ((uint64_t)factHi->rawValue().toUInt() << 32 | (uint64_t)factLo->rawValue().toUInt()) / 1000000;
+        int hours   = hobbsTimeSeconds / 3600;
+        int minutes = (hobbsTimeSeconds % 3600) / 60;
+        int seconds = hobbsTimeSeconds % 60;
+        QString timeStr;
+        timeStr.sprintf("%04d:%02d:%02d", hours, minutes, seconds);
+        return timeStr;
+    }
+    return QString("0000:00:00");
+}
 
 //-----------------------------------------------------------------------------
 //-----------------------------------------------------------------------------

src/Vehicle/Vehicle.h

@@ -319,6 +319,7 @@ public:
     Q_PROPERTY(bool              initialPlanRequestComplete READ initialPlanRequestComplete                             NOTIFY initialPlanRequestCompleteChanged)
     Q_PROPERTY(QVariantList         staticCameraList        READ staticCameraList                                       CONSTANT)
     Q_PROPERTY(QGCCameraManager*    dynamicCameras          READ dynamicCameras                                         NOTIFY dynamicCamerasChanged)
+    Q_PROPERTY(QString              hobbsMeter              READ hobbsMeter                                             NOTIFY hobbsMeterChanged)
 
     // Vehicle state used for guided control
     Q_PROPERTY(bool flying                  READ flying NOTIFY flyingChanged)                               ///< Vehicle is flying
@@ -690,7 +691,9 @@ public:
 
     bool capabilitiesKnown      (void) const { return _vehicleCapabilitiesKnown; }
     uint64_t capabilityBits     (void) const { return _capabilityBits; }    // Change signalled by capabilityBitsChanged
+
     QGCCameraManager*           dynamicCameras      () { return _cameras; }
+    QString                     hobbsMeter          ();
 
     /// @true: When flying a mission the vehicle is always facing towards the next waypoint
     bool vehicleYawsToNextWaypointInMission(void) const;
@@ -736,6 +739,7 @@ signals:
     void firmwareTypeChanged(void);
     void vehicleTypeChanged(void);
     void dynamicCamerasChanged();
+    void hobbsMeterChanged();
     void capabilitiesKnownChanged(bool capabilitiesKnown);
     void initialPlanRequestCompleteChanged(bool initialPlanRequestComplete);
     void capabilityBitsChanged(uint64_t capabilityBits);