Tweets per day in ruby

tpd.rb

#!/usr/bin/env ruby

# This snippet can be used to feed a megabitmeter
# with the number of tweets on a feed
# see also http://megabitmeter.de/
# Twitter-API: https://dev.twitter.com/apps

require 'rubygems'
require 'twitter'


Twitter.configure do |config|
  config.consumer_key = "someConsumerKey"
  config.consumer_secret = "TheConsumerSecret"
  config.oauth_token = "anOauth-Token" 
  config.oauth_token_secret = "The secret"
end

while (true) 

  timeline = Twitter.home_timeline
  ts_20th_tweet = timeline[-1].created_at.to_i
  #print "seconds difference: #{Time.now.to_i - ts_20th_tweet}\n"
  seconds_per_tweet = (Time.now.to_i - ts_20th_tweet ) / 20
  #print "seconds per tweet #{seconds_per_tweet}\n"
  tweets_per_second = 1 / seconds_per_tweet.to_f
  #print "tweets per second #{tweets_per_second}\n"
  tweets_per_week = tweets_per_second * 60 * 60 * 24 * 7
  print "tweets_per_week #{tweets_per_week}\n"
  #print "#{tweets_per_week.to_i}\n"
  `echo #{tweets_per_week.to_i} > /dev/ttyUSB0`
  `sleep 90`
  print "and again .."
end