hi, how can i do a test before a data transmmision to know if a port is being used or not?<br>thnaks<br clear="all"><br>-- <br>Ing Pedro Alonso Chaparro Valero<br>Ciudad Politecnica de la Innovación<br>iTEAM - Mobile Communications Group<br>
Polytechnic University of Valencia<br>C\ Camino de Vera S/N, Edificio 8G<br>46022 Valencia, Spain<br>