A quick script to turn on your Audi A3 E Tron's climate control remotely.

climate.rb

#!/usr/bin/env ruby

require 'unirest'

# Set these by going to etron.audiusa.com/web/aucwp/login once by hand and figuring them out
EMAIL = "me@example.com"
PASSWORD = "password"
ACCOUNT = 9999
PIN = 9999

# A really simple wrapper around Unirest so that we can have some cookie support
class CookieJar
  def initialize
    @jar = {}
  end

  def save_cookies(cookies)
    (cookies || []).each do |c|
      c = CGI::Cookie::parse(c).to_a
      @jar[c[0][0]] = c[0][1][0]
    end
  end

  def export
    header = ""

    @jar.each do |name, value|
      header += "#{name}=#{value}; "
    end

    return {Cookie: header[0...-2]}
  end

  def inspect
    return @jar.inspect
  end

  def post(url, options = {})
    resp = Unirest.post(url, options.merge(headers: export))

    save_cookies(resp.headers[:set_cookie])

    if resp.headers[:location]
      get(resp.headers[:location])
    else
      resp
    end
  end

  def get(url)
    resp = Unirest.get(url, {headers: export})

    save_cookies(resp.headers[:set_cookie])

    if resp.headers[:location]
      get(resp.headers[:location])
    else
      resp
    end
  end
end

cookies = CookieJar.new

cookies.get "https://etron.audiusa.com/web/aucwp/login"

puts "Submitting username and password..."

cookies.post "https://etron.audiusa.com/web/aucwp/login?p_p_id=58&p_p_lifecycle=1&p_p_state=normal&p_p_mode=view&p_p_col_id=column-1&p_p_col_count=1&_58_struts_action=%2Flogin%2Flogin",
    parameters: {
      _58_formDate: Time.now.to_i * 1000,
      _58_brand: "AUDI",
      _58_saveLastPath: false,
      _58_doActionAfterLogin: false,
      _58_login: EMAIL,
      _58_password: PASSWORD,
      _58_cwpRemember: "on",
      _58_userTimeZone: "America/Los_Angeles",
      _58_chkEnabled: "on"}

puts "Submitting account number and pin..."

cookies.post "https://etron.audiusa.com/web/aucwp/login?p_p_id=58&p_p_lifecycle=2&p_p_state=normal&p_p_mode=view&p_p_cacheability=cacheLevelPage&p_p_col_id=column-1&p_p_col_count=1",
    parameters: {
      _58_accountNo: ACCOUNT,
      _58_pin: PIN}

puts "Checking vehicle status..."

resp = cookies.post "https://etron.audiusa.com/group/aucwp/status?p_p_id=audidashboardportlet_WAR_audidashboardportlet&p_p_lifecycle=2&p_p_state=normal&p_p_mode=view&p_p_resource_id=GET_VEHICLE_STATUS&p_p_cacheability=cacheLevelPage&p_p_col_id=column-1&p_p_col_count=1"
data = resp.body

state_of_charge = data["StateOfCharge"].to_i
climate_on = data["isClimatisationOn"]

if state_of_charge <= 10
  puts "Oh no! Battery needs to be more than 10% charged to turn on climate control!"
  exit
end

if climate_on
  puts "The climate control is already on, silly!"
  exit
end

puts "\n"
puts "State of charge: #{state_of_charge}%"
puts "Plugged in: #{data["isChargingPlugConnected"]}"
puts "Charging: #{data["isBatteryCharging"]}"
puts "\n"

puts "Turning on climate control..."

resp = cookies.post 'https://etron.audiusa.com/group/aucwp/climate?p_p_id=etronclimateportlet_WAR_etronclimateportlet&p_p_lifecycle=2&p_p_state=normal&p_p_mode=view&p_p_resource_id=serveClimateTransaction&p_p_cacheability=cacheLevelPage&p_p_col_id=column-1&p_p_col_count=1',
    parameters: {_etronclimateportlet_WAR_etronclimateportlet_climateOnOffIconStatus: true}

transactionId = resp.body["transactionId"]
responseCode = "FAILURE"

while responseCode == "FAILURE"
  resp = cookies.post 'https://etron.audiusa.com/group/aucwp/climate?p_p_id=etronclimateportlet_WAR_etronclimateportlet&p_p_lifecycle=2&p_p_state=normal&p_p_mode=view&p_p_resource_id=pollClimateOnOff&p_p_cacheability=cacheLevelPage&p_p_col_id=column-1&p_p_col_count=1',
    parameters: {
      _etronclimateportlet_WAR_etronclimateportlet_climateTransactionId: transactionId,
      _etronclimateportlet_WAR_etronclimateportlet_climateOnOffIconStatus: true
    }

  responseCode = resp.body["responseCode"]
  sleep 3
end

puts "Climate control turned on!"

All you need to do is edit lines 4-7, make sure you have Ruby (plus the unirest library) installed, then run it like so:

ruby climate.rb