Save data posted from your cloudtrax WiFi network
This will setup Heroku app with an end point to collect Cloudtrax Presence Reporting data into a ClearDB MySQL DB. You can get (or change) your DB credentials in your Heroku App's Config Variables
You will then configure your Cloudtrax Presence Reporting 'Server Location' to your Heroku app location.
I have a Ruby/MongoDB implementation here: https://github.com/Skeyelab/cloudtrax-presence