$GPGGA,235954.030,0000.0000,N,00000.0000,E,0,00 ( Number of satallite visible) ,,0.0,M,0.0,M,,0000*4C From this it is clear that no of visible satallite is 0. so try to get minimum three satallite to find location go in open space and try if satallite not found you have to use external antenna.
