This Is What Your WiFi Signal Looks Like In 3D


If you’re old enough to remember CRT TV’s with the big bunny ear antennas, you’re likely to understand how easily radio signal strength can be affected by even a tiny move of the receptor. A similar principle applies to WiFi signals, and the above visualization drives the point straight home. It’s a 3D map of YouTuber CNLohr‘s WiFi signal in his home, albeit that of the relatively small area (360x360x180mm) within his CNC mill. See, to get this done he hooked up a ESP8266 WiFi module to his laptop, which gave him signal strength in real-time at 500Hz. He then mounted the module inside a large gantry-style cnc mill and took several long exposure shots, which he then composited in Voxeltastic, [CNLohr’s] own HTML5/WEBGL based render engine. The results can be seen above, and although it looks completely organic, it follows a pattern: “the signal strength increases and decreases in nodes and anti-nodes which correspond to the 12.4 cm wavelength of a WiFi signal.” And it also goes to show that if you’re having problems with reception, you might want to consider just moving your router a tiny bit before you start cursing it.

[ CNLohr’s Instructables ] VIA [ Engadget ]