How to connect the button to the computer?


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Want to make the button on the cable (~3M) connected to the computer, such as USB. Was formerly RS-232 and LPT - everything was just. How to do it in segodnyashnih realities? Soldering iron in hands to hold. Yes, and as this button then poll (or wait call) from code in C, Java or Python?
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Digispark
Digispark-attiny85-Micro-USB-Arduino.jpg
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Through Arduino as an option.
Although I don't like this toy, Ah such purposes it is simpler not to think. Worth a penny, examples of the network tons.
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Using any microcontroller (the most primitive version of Arduino) and work with UART (RX/TX) as a normal COM port.
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