>       int res;
>       const unsigned char artst[4]={1,2,3,4};
> 
>       { Flio_Serial_Port* o = new Flio_Serial_Port(30,440,70,120);
>               res = o-> open("COM1", 19200);
>               printf ("\n\n\n COM1 = %d",res); //returns 0 so ok
>               printf ("\nDisp: %s",dispchar);
>               res = o-> write(artst,sizeof(artst));
>               printf ("\n\n\n COM1 = %d",res);  //returns -1
>       }
> 
> I am doing something wrong when i am using the 'write' 
> 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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