After the connection port specification in the Freedom Scientific Braille display configuration string, you can optionally specify the required Braille dot firmness as a number from 0 to 255. 0 is the least firm. Firmness increases from the 0 representation up to the highest, represented by 255. The default is 128, just over 50%.
If specified, the dot firmness must be placed after the connection port information, separated by a comma, you cannot change the order of the settings.
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