What did OP mean by this?
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What did OP mean by this?
>>54487812
>What did OP mean by this?
Aren't you OP?
Something called Lifi, search it up
>>54487812
They mean using the lights in a room to transmit data to devices.
>>54487812
>>54487913
Optical wireless networks.
Essentially, you can modulate (brighten/darken or change color) certain light sources (not old incandescents, but LEDs work) at a speed much faster than the human eye can see
This results in a light bulb/source which APPEARS to be steady (enough you could never detect it with your eyes) but actually is flashing some sort of pattern. Other devices with tiny photo-detectors or cameras can pick up on this high frequency flashing and read the data encoded in its pattern.
>>54487949
Ain't that insecure?
>>54489078
Jesus Christ at least do some research. Radio waves = electromagnetic waves = light
>>54489078
no different to wifi, smart guy
>>54489078
It's actually more secure. Wifi operates on frequencies that are capable of penetrating walls. Network engineers use specialized antennas to maximize coverage while minimizing leakage (signal leaking outside via windows or due to being near walls). Using a light-based medium is significantly safer because it's only accessible by looking in the window or being in the room.
That's also a huge downside. It only works in that one room.