WiFi has become so omnipresent that losing signal for five minutes feels like the end of civilisation, but there may be a new contender on the horizon that uses light instead of radio waves to send data.
PureLiFi, a spin out project from the University of Edinburgh, was created in 2011 by professor of mobile communications, Professor Harald Haas.
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For the past five years, PureLiFi has been building a range of devices to turn this concept into a reality