So I've been trying to learn the boost::asio stuff to communicate to a serial device using RS232. The documementation is sparse and the examples are non-existent. Can't figure out exactly how to communicate with the device. The device can't send data so all I need to do is write, but other projects require actual back and forth communication so help with that would be appreciated. What code I have so far follows.

#include <boost/asio/serial_port.hpp>
using namespace::boost::asio;

int main()
{
    io_service io;
    serial_port port( io, "COM3" );
    port.set_option( serial_port_base::baud_rate( 19200 ) );

    unsigned char commands[4] = { 1, 128, 240, 0 };

    // write the commands to the device

    return 0;
}

In short: need help with the io part of the serial_port.

c++ boost
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