This is the business logic for my portfolio project on kankawabata.com/morse_code. Some of the code here were lifted out of my previous kivy implementation see here
The MorseEngine class takes one parameter tapping_speed. tapping_speed determines the duration that the user needs to press to register as a dot/dash/short pause/long pause. The smaller the number the quicker the user will have to tap.
The Morse Engine "signal" is a sequence of number and alternating "U"s and "D"s, such as the one seen below:
23U1D1U1D1U1D1U1D
There are two states when transmitting morse code the pressed and unpressed states. the number in the signal represents the number of frame (10ms increments) of the state and the U/D following after indicates the state (unpressed/pressed respectively)
So for example in the above signal 23U represents 23 frames (230ms) of the key not being pressed followed by 1 frame of the key being pressed (1d), etc.