Installing ruby-serial port

Hi guys,

Ive been trying to install the gem, ruby-serialport but having troubles
with it on windows. I have installed the Devkit but no luck with
installing the serialport. I have seen a few people having similar
problems but haven’t found a solution.

C:\Ruby192\bin>gem install ruby-serialport
Temporarily enhancing PATH to include DevKit…
Building native extensions. This could take a while…
ERROR: Error installing ruby-serialport:
ERROR: Failed to build gem native extension.

    C:/Ruby192/bin/ruby.exe extconf.rb

checking for OS… mingw
checking for termios.h… no
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers. Check the mkmf.log file for more
details. You may need configuration options.

Provided configuration options:
–with-opt-dir
–without-opt-dir
–with-opt-include
–without-opt-include=${opt-dir}/include
–with-opt-lib
–without-opt-lib=${opt-dir}/lib
–with-make-prog
–without-make-prog
–srcdir=.
–curdir
–ruby=C:/Ruby192/bin/ruby

Gem files will remain installed in
C:/Ruby192/lib/ruby/gems/1.9.1/gems/ruby-serialport-0.7.0 for
inspection.
Results logged to
C:/Ruby192/lib/ruby/gems/1.9.1/gems/ruby-serialport-0.7.0/ext/gem_make.out

Help will be much appreciated!! Thanks