begin cleanup on gps code

src/GPS.cpp

@@ -0,0 +1,42 @@
+
+#include "GPS.h"
+
+HardwareSerial _serial_gps(GPS_SERIAL_NUM);
+
+GPS gps;
+
+GPS::GPS() : PeriodicTask(30 * 1000)
+{
+}
+
+void GPS::setup()
+{
+#ifdef GPS_RX_PIN
+    _serial_gps.begin(GPS_BAUDRATE, SERIAL_8N1, GPS_RX_PIN, GPS_TX_PIN);
+#endif
+}
+
+void GPS::loop()
+{
+    PeriodicTask::loop();
+
+#ifdef GPX_RX_PIN
+    while (_serial_gps.available())
+    {
+        _gps.encode(_serial_gps.read());
+    }
+#endif
+}
+
+void GPS::doTask()
+{
+}
+
+String GPS::getTime()
+{
+    static char t[12]; // used to sprintf for Serial output
+
+    snprintf(t, sizeof(t), "%02d:%02d:%02d", time.hour(), time.minute(), time.second());
+    return t;
+}
+