From: Luis Lavena <luislavena@...>
Date: 2010-02-04T21:44:15+09:00
Subject: Re: ruby-serialport with Ruby 1.9 error

On Feb 4, 3:40 am, Tim Ngua <techro...@yahoo.co.uk> wrote:
> I'm a newbie programmer and I've been trying to communicate with an
> Arduino using the ruby-serialport library. If I run this:
>
> require 'rubygems'
> require 'serialport'
> sp = SerialPort.new "COM3", 9600
> sp.write "H"
> puts sp.read   # hopefully "OK" ;-)
>
> I get this error (as a windows pop-up box):
>
> 'The application has failed to start because msvcrt-ruby18.dll was not
> found. Re-installing the application may fix the problem.'
>
> and this ruby error in my command line window:
>
> D:/Ruby19/lib/ruby/gems/1.9.1/gems/ruby-serialport/lib/serialport.rb:1:in
> `require': 126:
> The specified module could not be found.   -
> D:/Ruby19/lib/ruby/1.9.1/i386-mingw32/serialport.so (LoadError)
>         from
> D:/Ruby19/lib/ruby/gems/1.9.1/gems/ruby-serialport/lib/serialport.rb:1:in
> `<top (required)>'
>         from ser.rb:2:in `require'
>         from ser.rb:2:in `<main>'
>
> As far as I can see, the serialport library was supposed to work with
> 1.8. There doesn't seem to be a 1.9 version on the GitHub repository
> either.
>

You've installed a Binary gem for 1.8 when you've tried to use Ruby
1.9

Please install a gem binary gem that is compatible with Ruby 1.9 or
force the compilation process indicating the "ruby" platform:

gem install ruby-serialport --platform=ruby

I can't comment on the state of the gem itself, but if you used
RubyInstaller and the Development Kit, building other gems could be
straight forward as *nix OS.

http://rubyinstaller.org/
http://wiki.github.com/oneclick/rubyinstaller/development-kit

--
Luis Lavena