gem 'twilio-ruby'

class TwilioController < ApplicationController

def index

end

def sent_sms
  account_sid = "I put my ID here"
  auth_token = "I put my auth token here"
  twilio_phone_number = "xxxxxxxxx"

  message_body = params["Body"]
  from_number = params["From"]

  @client = Twilio::REST::Client.new(account_sid, auth_token)
  @client.account.sms.messages.create(
    from: "+1#{twilio_phone_number}",
    to: "+1#{from_number}",
    body: "Hey there! I got a text from you"
  )
end

http://[yourdomain].com/Twilio/send_sms

twiml = Twilio::TwiML::Response.new do |r|
    r.Message "Hey there! I got a text from you."
end
twiml.text

<?xml version="1.0" encoding="UTF-8"?>
<Response>
    <Message>Hey there! I got a text from you.</Message>
</Response>