Mindwave

This gem is a library for Neurosky Mindwave headsets. It reads out EEG-data from the ThinkGear Serial Stream and provides callback-methods for processing the data. this library works for Mindwave and Mindwave-Mobile.

Installation

Install from rubygems.org

gem install mindwave

Using bundler

gem 'mindwave', :git => "https://github.com/whotwagner/mindwave.git",

Manual installation

git clone https://github.com/whotwagner/mindwave
cd mindwave
rake build
gem install pkg/mindwave-<VERSION>.gem

Usage

In the following example the default callback-methods are invoked:

#!/usr/bin/env ruby

require 'mindwave'

# create a new instance
mw = Mindwave::Headset.new
mw.log.level = Logger::INFO

# if we hit ctrl+c then just stop the run()-method
Signal.trap("INT") do
    mw.stop
end

# Create a new Thread
thread = Thread.new { mw.run }
# ..and run it
thread.join

mw.close

The callback-methods can be overwritten with own code:

#!/usr/bin/env ruby

require 'mindwave'

class EEG < Mindwave::Headset
    # override Attention-Callback-Method
    def attentionCall(attention)
            str = eSenseStr(attention)
            puts "this is an attention #{attention} #{str}\n"
    end
end

# create a new instance
mw = EEG.new
# mw.log.level = Logger::DEBUG

# if we hit ctrl+c then just stop the run()-method
Signal.trap("INT") do
    mw.stop
end

# Create a new Thread
thread = Thread.new { mw.run }
# ..and run it
thread.join

mw.close

Callback for EEG-powers:

#!/usr/bin/env ruby

require 'mindwave'

class EEG < Mindwave::Headset
  # override Attention-Callback-Method
  def asicCall(asic)

    puts "DEBUG: ASIC array: #{asic}\n"

    # pass asic to parseASIC and store result
    parsed = parseASIC(asic)

    # print the values of the waves to STDOUT
    puts "delta:     #{parsed[0]}"
    puts "theta:     #{parsed[1]}"
    puts "lowAlpha:  #{parsed[2]}"
    puts "highAlpha: #{parsed[3]}"
    puts "lowBeta:   #{parsed[4]}"
    puts "highBeta:  #{parsed[5]}"
    puts "lowGamma:  #{parsed[6]}"
    puts "midGamma:  #{parsed[7]}"
  end

end

# create a new instance
mw = EEG.new
# mw.log.level = Logger::DEBUG

# if we hit ctrl+c then just stop the run()-method
Signal.trap("INT") do
    mw.stop
end

# Create a new Thread
thread = Thread.new { mw.run }
# ..and run it
thread.join


mw.close

Documentation

rubydoc.info

Resources

• http://developer.neurosky.com/docs/lib/exe/fetch.php?media=app_notes:mindwave_rf_external.pdf
• http://developer.neurosky.com/docs/doku.php?id=thinkgear_communications_protocol
• https://github.com/BarkleyUS/mindwave-python

Development

After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/whotwagner/mindwave. I am highly interested at pull requests for the mindwave-mobile-headset.