+#if AO_SERIAL_SPEED_UBLOX == AO_SERIAL_SPEED_57600
+#define SERIAL_SPEED_STRING "57600"
+#define SERIAL_SPEED_CHECKSUM "2d"
+#endif
+#if AO_SERIAL_SPEED_UBLOX == AO_SERIAL_SPEED_19200
+#define SERIAL_SPEED_STRING "19200"
+#define SERIAL_SPEED_CHECKSUM "23"
+#endif
+#if AO_SERIAL_SPEED_UBLOX == AO_SERIAL_SPEED_9600
+#define SERIAL_SPEED_STRING "9600"
+#define SERIAL_SPEED_CHECKSUM "16"
+#endif
+
+static const char ao_gps_set_nmea[] =
+ "\r\n$PUBX,41,1,3,1," SERIAL_SPEED_STRING ",0*" SERIAL_SPEED_CHECKSUM "\r\n";