Hydra gps troubleshooting

variants/diy/v1/variant.h

@@ -4,9 +4,10 @@
 
 // GPS
 #undef GPS_RX_PIN
-#define GPS_RX_PIN 15
-//#undef GPS_TX_PIN
-//#define GPS_TX_PIN 12 // not connected
+#undef GPS_TX_PIN
+#define GPS_RX_PIN 12
+#define GPS_TX_PIN 15
+#define GPS_UBLOX
 
 #define BUTTON_PIN 39 // The middle button GPIO on the T-Beam
 #define BATTERY_PIN 35 // A battery voltage measurement pin, voltage divider connected here to measure battery voltage