Avid recently released one of the most exciting iPad apps ever, and it free! PT|Control is downloadable from the App Store for iPad only (no iPhone). Not only is it capable of wirelessly putting control of Pro Tools at your fingertips, it can also work with almost any other DAW or Video Editor such as Sternberg Cubase 8, Nuendo 6.6, Avid Media Composer, or Apple Logic Pro X.
The first step is to download PT|Control from the App Store. Once you've downloaded the app, make sure to launch it and go through the setup process to Login to your Avid Account.
Now you will need to download the EuControl Application for your computer. This needs to be present in order for the iPad App to communicate with Pro Tools. Login to your Avid Account on your computer and download the EuControl application located in the "My Products and Subscriptions" link of your account.
Click on the Pro Tools | Control and EuControl menu to show all the available downloads. Go ahead and download the appropriate version for your computer, Mac or Windows.
NOTE: Make sure you are running the latest version of Pro Tools 12. The iPad app only works with Pro Tools 12.2 or 12.2.1
Once you've installed the EuControl Application on your computer, it's a good idea to Restart. Give all those gremlins inside your computer a re-boot. When your computer restarts your will notice that EuControl automatically starts when your computer boots up. It's running in the background at all times, along with the Avid Account Manager.
You must now also turn on EUCON inside of the Pro Tools software. Make sure to launch Pro Tools. Once it has fully launched, set up EuControl by going to the Setup Menu and clicking on "Peripherals"
Click on the "Ethernet Controllers" tab in the Peripherals window. At the very bottom you will see "Enable EUCON". Click the box to make sure it is selected & enabled. This tells Pro Tools to look for available EUCON controllers attached to your network.
NOTE: The most Important part of the setup is making sure your computer and iPad are on the same Wireless Network
Once you have finished setting up your system, double-check to make sure your iPad and computer are both connected to the same wireless network. Launch a session in Pro Tools as well as also launching the iPad App. If everything is communicating properly, the EuControl icon will appear as a solid color (instead of grey-ghost color) to indicate communication.
If everything is set up correctly, the App should have already populated with the Pro Tools session. Your iPad is now a full featured part of your Pro Tools system. You'll notice immediately the basics, Tracks, Volume Faders, Rec, Solo, Mute buttons, etc... However, the most innovative features are the ability to support multi-touch gesture control, allowing you to touch multiple parameters at once. Furthermore, the app will automatically update it's controls to any app that you bring into focus on your computer. For example, if you are running Logic and Pro Tools simultaneously, the app automatically switches control between them when you switch on screen. Brilliant!
Depending on the scale of Pro Tools system you have, the app can extend it functionally in the system. You can use the app to wirelessly control Pro Tools on a laptop, or you can use it along with a work-surface such as the Avid Artist Mix or S6.
Here are some useful links for you in case you run into any problems.
Link - PT | Control User Guide