"You were right !!wire pinot was not correct! In particular VCC and ground were wrong..now is ok but still i recive same results.. I've tryed to invert TX and RX but apmplanner gives the same result ..no GPS ...don't understand...any idea?????"
apm 2.5 ,last firmware on board ..quad x drone .Arduplanner or Apmplanner both working, except the gps module...on screen, once connected Apm planner for istance, appear this frustrating advice.. "NO GPS "!!! In reality the module is wire…