Why a flashlight need SOS mode?

[hank]

> pattern

Yeah, the correct length of the bright pulse, and the interval between the letters, and the interval between the ‘words’ — are all defined for Morse Code.

http://www.nu-ware.com/NuCode%20Help/morse_code_structure_and_timing\_.htm

The basic element of Morse code is the dot and all other elements can be defined in terms of multiples of the dot length. The word PARIS is used because this is the length of a typical word in English plain text, it has a total length of 50 dot lengths. If the word PARIS can be sent ten times in a minute using normal Morse code timing then the code speed is 10 WPM.
The character speed is related to dot length in seconds by the following formula:
Speed (WPM) = 2.4 * (Dots per second)

Here are the ratios for the other code elements:
Dash length = Dot length x 3
Pause between elements = Dot length
Pause between characters = Dot length x 3
Pause between words (see note) = Dot length x 7

The blinking is amateurish coding. I have one lamp that sends “SOSOSOSOSOSOSOS” — yeah, it’s a SO-SO light.
All the rest I see do what Adoby describes, they just mush together dots and dashes.

It would be truly remarkable if the people programming the ubiquitous Chinese driver could get it right.