Fetch the most recent power meter reading from EPB.

epb.rb

require 'io/console'
require 'capybara/dsl'
require 'capybara-webkit'

URL = 'https://webconnect.epb.net/iwr/consumption/customer-energyOnDemand.seam'

print 'Username: '
username = gets.chomp

print 'Password: '
password = STDIN.noecho(&:gets).chomp
puts

Capybara.javascript_driver = :webkit

session = Capybara::Session.new(:webkit).tap do |session|
  session.visit URL
end

session.fill_in 'username', with: username
session.fill_in 'password', with: password
session.click_button 'Login'

reading = session.find('[id="energyOnDemand:j_id160"]').text

puts "Last Reading: #{reading}"

Gemfile

source 'https://rubygems.org/'

gem 'capybara'
gem 'capybara-webkit'