Have you seen our Arduino library for the Maestro? The maestro-arduino library makes it easy to control a Maestro via its TTL serial interface. (For more information about the Maestro's serial interface, see the "Serial Interface" section in the Maestro's user's guide.) To get started, you can read the README in the maestro-arduino's repository and look at its examples to get an idea of how the library works.
If you write some code (or modify one of the examples) and run into problems, you can post your code here, and I would be happy to take a look.