The writers() function attempts to write nbytes from buffer to the serial port associated with handle.

The function returns the number of bytes written to the serial port.

A return value of -1 indicates an error.

int writers(int fd,char *data,int datalen,int timeout_ms)

Example:

void main() 

{

     int fd = openrs(RS232_1,9600,8,0,1,'>');

     int len = writers(fd,"Hello serial",strlen("Hello serial"), 1000);

     closers(fd);

}