Now we will see what Matthias says. Thanks anyway.
>
> > int res;
> > const unsigned char artst[4]=3D{1,2,3,4};
> >=20
> > { Flio_Serial_Port* o =3D new Flio_Serial_Port(30,440,70,120);
> > res =3D o-> open("COM1", 19200);
> > printf ("\n\n\n COM1 =3D %d",res); //returns 0 so ok
> > printf ("\nDisp: %s",dispchar);
> > res =3D o-> write(artst,sizeof(artst));
> > printf ("\n\n\n COM1 =3D %d",res); //returns -1
> > }
> >=20
> > I am doing something wrong when i am using the 'write'=20
> > command. Please help.
>
> Don't know.
> Looks OK but I'm not sure what Matthias' code does "behind the scenes".
> I'd try sending some "ASCII safe" values to see if that was any better -
> any byte value less than 0x20 *might* be getting interpreted as a
> control character somewhere along the way...
>
>
>
>
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