nopn0p / blink

bypass airgaps by flashing LEDs

blink: bypassing airgaps by flashing LEDs

This is a fun little afternoon project that I decided to do because I was reminded of the existence of LEDitgo, so I wanted to see how easy this would be to implement in python at a much lower scale. (spoiler alert, it's easy)

usage

Transmitting text file through HDD activity LED on HP laptop running Arch Linux: sudo python main.py test.txt /sys/class/leds/hp\:\:hddprotect/brightness

configuration

You can set 3 values in main.py: led_interval, bit_interval and byte_interval.

1. led_interval determines the time that passes between each activation/deactivation of the LED.
2. bit_interval determines the time that passes between the transmission of each bit.
3. byte_interval determines the time that passes between the transmission of each byte.