Fix #362 by @a-f-G-U-C - I was mispelling NMEA ;-)

src/gps/NMEAGPS.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include "../concurrency/PeriodicTask.h"
+#include "GPS.h"
+#include "Observer.h"
+#include "TinyGPS++.h"
+
+/**
+ * A gps class thatreads from a NMEA GPS stream (and FIXME - eventually keeps the gps powered down except when reading)
+ *
+ * When new data is available it will notify observers.
+ */
+class NMEAGPS : public GPS
+{
+    TinyGPSPlus reader;
+
+    uint32_t lastUpdateMsec = 0;
+
+  public:
+    virtual void loop();
+};