AirMidi is an iPad App that lets you connect your device to your favorite DAW throw a Wifi connection.
Steps.
1) Turn on your WiFi spot.
2) Open MIDI Setup on Utilities folder.
3) Click on "Show MIDI Window"
4) Double click on Network section.
5) Open Logic or your favorite DAW.
6) Assign key-commands by "learning" MIDI.
7) Save. Enjoy.