From: "B. Randy" Date: 2009-03-13T23:49:20+09:00 Subject: Re: serial port connection Hello, Very intersting ... I'll try it late. Well, I suppose that you are under Win$ and you must notice that the SERIAL link is a "funny" game. 1 - Use a modem-cable, to link the two RS232 ports of your PC or an other RS232 on a other PC. 2 - Test with classics tools the communication. On Win$, there is "Hyper Terminal", any other kind of tool is good. On Linux, "minicom" for example. Configure the two tools : same speed, no hardware handshaking, no software handshaking, same parity, same stop-bits. After, when you type some words in one window, you must see the text in the other. At this point, your link is good. 3 - Replace one of the tools (Hyper Terminal, minicom) by your Ruby code. Try to send some text. I'll take the example from : http://ruby-serialport.rubyforge.org/ and make some modifications. require 'rubygems' require 'serialport' sp = SerialPort.new "COM1", 9600, 1, NONE sp.write "Hello world !" puts sp.read You should see the text on the new window. At this point, the soft is good. You can play with a modem too. 4 - For you HW. I don't know the kind of your HW, so I'll be "large". Don't forget to verify the protocol of your HW board. Some HW wants some special escape caracters before and after the message, or special sequence for initiate the link, or want work only in dialog mode. In this later case when you send something you must read something, if you don't make this the HW will block. Sangeeta Huddar wrote: [...] > now i want to use this and access the board .i tried d simple ways i > could think but nothing worked :( [...] > can anyone help me with simple program to use serial.so > or is there any other way i can connect to board via serial port > thanks in advance, > -sangeeta -- Posted via http://www.ruby-forum.com/.