fix #462 publish immediately on any GPS state change

(don't wait until end of aquisition window)

src/gps/GPS.cpp

@@ -36,6 +36,23 @@ bool GPS::setup()
     return ok;
 }
 
+/// Record that we have a GPS
+void GPS::setConnected()
+{
+    if (!hasGPS) {
+        hasGPS = true;
+        shouldPublish = true;
+    }
+}
+
+void GPS::setNumSatellites(uint8_t n)
+{
+    if (n != numSatellites) {
+        numSatellites = n;
+        shouldPublish = true;
+    }
+}
+
 /**
  * Switch the GPS into a mode where we are actively looking for a lock, or alternatively switch GPS into a low power mode
  *
@@ -114,19 +131,23 @@ uint32_t GPS::getSleepTime() const
 
 void GPS::publishUpdate()
 {
-    DEBUG_MSG("publishing GPS lock=%d\n", hasLock());
+    if (shouldPublish) {
+        shouldPublish = false;
 
-    // Notify any status instances that are observing us
+        DEBUG_MSG("publishing GPS lock=%d\n", hasLock());
-    const meshtastic::GPSStatus status =
+
-        meshtastic::GPSStatus(hasLock(), isConnected, latitude, longitude, altitude, dop, heading, numSatellites);
+        // Notify any status instances that are observing us
-    newStatus.notifyObservers(&status);
+        const meshtastic::GPSStatus status =
+            meshtastic::GPSStatus(hasLock(), isConnected(), latitude, longitude, altitude, dop, heading, numSatellites);
+        newStatus.notifyObservers(&status);
+    }
 }
 
 void GPS::loop()
 {
     if (whileIdle()) {
         // if we have received valid NMEA claim we are connected
-        isConnected = true;
+        setConnected();
     }
 
     // If we are overdue for an update, turn on the GPS and at least publish the current status
@@ -147,8 +168,17 @@ void GPS::loop()
         }
 
         // If we've already set time from the GPS, no need to ask the GPS
-        bool gotTime = (getRTCQuality() >= RTCQualityGPS) || lookForTime();
+        bool gotTime = (getRTCQuality() >= RTCQualityGPS);
+        if (!gotTime && lookForTime()) { // Note: we count on this && short-circuiting and not resetting the RTC time
+            gotTime = true;
+            shouldPublish = true;
+        }
+
         bool gotLoc = lookForLocation();
+        if (gotLoc && !hasValidLocation) { // declare that we have location ASAP
+            hasValidLocation = true;
+            shouldPublish = true;
+        }
 
         // We've been awake too long - force sleep
         auto wakeTime = getWakeTime();
@@ -158,8 +188,6 @@ void GPS::loop()
         // or if we got a time and we are in GpsOpTimeOnly mode
         // DEBUG_MSG("gotLoc %d, tooLong %d, gotTime %d\n", gotLoc, tooLong, gotTime);
         if ((gotLoc && gotTime) || tooLong || (gotTime && getGpsOp() == GpsOperation_GpsOpTimeOnly)) {
-            if (gotLoc)
-                hasValidLocation = true;
 
             if (tooLong) {
                 // we didn't get a location during this ack window, therefore declare loss of lock
@@ -167,9 +195,12 @@ void GPS::loop()
             }
 
             setAwake(false);
-            publishUpdate(); // publish our update for this just finished acquisition window
+            shouldPublish = true; // publish our update for this just finished acquisition window
         }
     }
+
+    // If state has changed do a publish
+    publishUpdate();
 }
 
 void GPS::forceWake(bool on)

src/gps/GPS.h

@@ -22,9 +22,14 @@ class GPS
 
     bool wakeAllowed = true; // false if gps must be forced to sleep regardless of what time it is
 
+    bool shouldPublish = false; // If we've changed GPS state, this will force a publish the next loop()
+
+    bool hasGPS = false; // Do we have a GPS we are talking to
+
+    uint8_t numSatellites = 0;
+
     CallbackObserver<GPS, void *> notifySleepObserver = CallbackObserver<GPS, void *>(this, &GPS::prepareSleep);
 
-  protected:
   public:
     /** If !NULL we will use this serial port to construct our GPS */
     static HardwareSerial *_serial_gps;
@@ -37,9 +42,6 @@ class GPS
     uint32_t dop = 0;     // Diminution of position; PDOP where possible (UBlox), HDOP otherwise (TinyGPS) in 10^2 units (needs
                           // scaling before use)
     uint32_t heading = 0; // Heading of motion, in degrees * 10^-5
-    uint32_t numSatellites = 0;
-
-    bool isConnected = false; // Do we have a GPS we are talking to
 
     virtual ~GPS() {} // FIXME, we really should unregister our sleep observer
 
@@ -56,6 +58,9 @@ class GPS
     /// Returns ture if we have acquired GPS lock.
     bool hasLock() const { return hasValidLocation; }
 
+    /// Return true if we are connected to a GPS
+    bool isConnected() const { return hasGPS; }
+
     /**
      * Restart our lock attempt - try to get and broadcast a GPS reading ASAP
      * called after the CPU wakes from light-sleep state
@@ -99,6 +104,11 @@ class GPS
      */
     virtual bool lookForLocation() = 0;
 
+    /// Record that we have a GPS
+    void setConnected();
+
+    void setNumSatellites(uint8_t n);
+
   private:
     /// Prepare the GPS for the cpu entering deep or light sleep, expect to be gone for at least 100s of msecs
     /// always returns 0 to indicate okay to sleep

src/gps/NMEAGPS.cpp

@@ -84,7 +84,7 @@ bool NMEAGPS::lookForLocation()
             heading = reader.course.value() * 1e3; // Scale the heading (in degrees * 10^-2) to match the expected degrees * 10^-5
         }
         if (reader.satellites.isValid()) {
-            numSatellites = reader.satellites.value();
+            setNumSatellites(reader.satellites.value());
         }
 
         // expect gps pos lat=37.520825, lon=-122.309162, alt=158

src/gps/UBloxGPS.cpp

@@ -8,20 +8,23 @@ UBloxGPS::UBloxGPS() {}
 
 bool UBloxGPS::tryConnect()
 {
-    isConnected = false;
+    bool c = false;
 
     if (_serial_gps)
-        isConnected = ublox.begin(*_serial_gps);
+        c = ublox.begin(*_serial_gps);
 
-    if (!isConnected && i2cAddress) {
+    if (!c && i2cAddress) {
         extern bool neo6M; // Super skanky - if we are talking to the device i2c we assume it is a neo7 on a RAK815, which
                            // supports the newer API
         neo6M = true;
 
-        isConnected = ublox.begin(Wire, i2cAddress);
+        c = ublox.begin(Wire, i2cAddress);
     }
 
-    return isConnected;
+    if (c)
+        setConnected();
+
+    return c;
 }
 
 bool UBloxGPS::setupGPS()
@@ -45,7 +48,7 @@ bool UBloxGPS::setupGPS()
     for (int i = 0; (i < 3) && !tryConnect(); i++)
         delay(500);
 
-    if (isConnected) {
+    if (isConnected()) {
         DEBUG_MSG("Connected to UBLOX GPS successfully\n");
 
         if (!setUBXMode())
@@ -106,8 +109,8 @@ bool UBloxGPS::factoryReset()
     for (int i = 0; (i < 3) && !tryConnect(); i++)
         delay(500);
 
-    DEBUG_MSG("GPS Factory reset success=%d\n", isConnected);
+    DEBUG_MSG("GPS Factory reset success=%d\n", isConnected());
-    if (isConnected)
+    if (isConnected())
         ok = setUBXMode();
 
     return ok;
@@ -127,7 +130,7 @@ void UBloxGPS::whileActive()
     // Update fixtype
     if (ublox.moduleQueried.fixType) {
         fixType = ublox.getFixType(0);
-        DEBUG_MSG("GPS fix type %d, numSats %d\n", fixType, numSatellites);
+        // DEBUG_MSG("GPS fix type %d, numSats %d\n", fixType, numSatellites);
     }
 }
 
@@ -170,7 +173,7 @@ bool UBloxGPS::lookForLocation()
     bool foundLocation = false;
 
     if (ublox.moduleQueried.SIV)
-        numSatellites = ublox.getSIV(0);
+        setNumSatellites(ublox.getSIV(0));
 
     if (ublox.moduleQueried.pDOP)
         dop = ublox.getPDOP(0); // PDOP (an accuracy metric) is reported in 10^2 units so we have to scale down when we use it
@@ -189,8 +192,7 @@ bool UBloxGPS::lookForLocation()
 
             // bogus lat lon is reported as 0 or 0 (can be bogus just for one)
             // Also: apparently when the GPS is initially reporting lock it can output a bogus latitude > 90 deg!
-            foundLocation =
+            foundLocation = (latitude != 0) && (longitude != 0) && (latitude <= 900000000 && latitude >= -900000000);
-                (latitude != 0) && (longitude != 0) && (latitude <= 900000000 && latitude >= -900000000) && (numSatellites > 0);
         }
     }
 

src/mesh/MeshService.cpp

@@ -247,10 +247,10 @@ void MeshService::sendToMesh(MeshPacket *p)
     nodeDB.updateFrom(*p); // update our local DB for this packet (because phone might have sent position packets etc...)
 
     // Strip out any time information before sending packets to other  nodes - to keep the wire size small (and because other
-    // nodes shouldn't trust it anyways) Note: for now, we allow a device with a local GPS to include the time, so that gpsless
+    // nodes shouldn't trust it anyways) Note: we allow a device with a local GPS to include the time, so that gpsless
     // devices can get time.
     if (p->which_payload == MeshPacket_decoded_tag && p->decoded.which_payload == SubPacket_position_tag) {
-        if (!gps->isConnected) {
+        if (getRTCQuality() < RTCQualityGPS) {
             DEBUG_MSG("Stripping time %u from position send\n", p->decoded.position.time);
             p->decoded.position.time = 0;
         } else

src/mesh/PhoneAPI.cpp

@@ -113,7 +113,7 @@ size_t PhoneAPI::getFromRadio(uint8_t *buf)
         // app not to send locations on our behalf.
         myNodeInfo.has_gps = (radioConfig.preferences.location_share == LocationSharing_LocDisabled)
                                  ? true
-                                 : (gps && gps->isConnected); // Update with latest GPS connect info
+                                 : (gps && gps->isConnected()); // Update with latest GPS connect info
         fromRadioScratch.which_variant = FromRadio_my_info_tag;
         fromRadioScratch.variant.my_info = myNodeInfo;
         state = STATE_SEND_RADIO;