…if you don't have one already. The currently supported models include the 6, 6S, 7E, 8, 8S, 10, 12, 12S, 12E, F4, F7 and F12E, and you can read some opinions here: Which Devo TX should I buy?
First ensure your TX is supported. DEVO 4, 7, 12E and F12 are not supported at the moment. Some might be supported later, others probably never will be.
Second, give deviation a try without any risks: download the emulator, which is a PC program that mimics the user interface of the real TX, so you can see if you like it at all. You can download it for each TX from the Deviation Releases section of the Downloads menu. Their name start with “deviation-emu_devo…”.
Deviation can be simple to use, but like any sophisticated Radio Control system, there is a learning curve. Do yourself a favor and read the manual. It will ease the transition.
You can read the actual documentation online by clicking on the appropriate User Manual submenu on the left (DEVO 6/8/12, DEVO 7E/10), or you can download it as a PDF (DEVO 6/8/12, DEVO 7E/10).
You can download it for each TX from the Deviation Releases section of the Downloads menu.
There are three type of releases:
If you have successfully installed deviation, you can start using these protocols, supported by the standard in-built RF module:
You can find ready to use model configs in the forum or in the Wiki for your models, which you can download, and simply copy into your TX through USB, just like you copy to any USB drive.
In order to have more protocols, you can install additional RF modules into your TX with a simple hardware mod.
You can check which model uses which protocol and RF module on the list of Supported Models.
…always look for an answer first in the Frequently Asked Questions (FAQ) list.
The Tutorials and How-Tos can also be helpful.
If you haven't found an answer for your particular question, just ask away in the Forum. However, when you start a new topic, please select a category appropriate to your question! And only pick one to start with. Creating two threads just makes things confusing, and if it's in the wrong place that can be dealt with later.