Sleep Module for mruby mruby sleep module install by mrbgems add conf.gem line to build_config.rb MRuby::Build.new do |conf| # ... (snip) ... conf.gem :git => 'https://github.com/matsumoto-r/mruby-sleep.git' end example Sleep::sleep(10) Sleep::usleep(10000) License under the MIT License: http://www.opensource.org/licenses/mit-license.php