LEDs used to map Wi-Fi

The article “Immaterials: Light painting WiFi” by Einar Sneve Martinussen was published about a year ago and I confess I have only just stumbled across this.  It is an excellent piece of art meets engineering where LEDs and long image exposure times are used to visually map out Wi-Fi signal strength.

LEDs map out Wi-Fi in OsloI found the piece interesting in itself but also because it makes an interesting comparison between Wi-Fi and Li-Fi.  With Wi-Fi, to get the best data rate you must seek out the best signal strength – which is invisible. With Li-Fi it is obvious where the best data rate can be achieved – just find a spot which is well lit.


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