The lack of means of communication blocks patients with disabilities such as the Locked-In Syndrome (LIS). These persons are able to express their desire in their brain but they are unable to perform it. Here, we propose a method of temporal classification of the EEG (ElectroEncephalogram) signals from the scalp of those people and translate them into Morse code. Thus, they have the ability to write a word or, furthermore, an understandable sentence by using a Brain-Computer Interface (BCI). The LIS attendant will only see the letters shown on screen, not the inherent manipulations.