speedtest.rb

require 'csv'

last_result = `tail -n1 /usr/share/cacti/site/scripts/speedtest.csv`

def bits_to_mbit(bits)
  bits / 1024.0 / 1024.0
end

CSV.parse(last_result) do |row|
  @ping = row[5].to_f
  @down_speed = bits_to_mbit(row[6].to_f)
  @up_speed = bits_to_mbit(row[7].to_f)
end

puts "down:#{@down_speed.round(1)} up:#{@up_speed.round(1)} ping:#{@ping.round(1)}"