Why wonder where the source of a Wi-Fi signal is when you can see its location in color? A software scientist has found a way to build color 3d maps that represent Wi-Fi signal strength. All that is needed for this is a colored LED flashlight, a laptop and a coordinate machine.
Dominic Tibout, a Smith College professor, faced this discovery when he attached an LED to a battery and a computer chip designed to measure Wi-Fi power. Taking the resulting contraption in his hands, the professor moved from room to room, and at each point the chip sent data to the laptop about the quality of the Wi-Fi signal, as well as about the corresponding color. Weak signal areas are highlighted in red, blue and green indicate high-quality Wi-Fi.
The researcher drew attention to the fact that when moving, the colors change greatly, even in adjacent points that are close to each other. Then he filmed his trajectory and signal strength with a digital camera, and found a huge number of places with poor Wi-Fi reception.
Taibout then attached his rig to the tine of a woodworking coordinate machine that could move in three dimensions (with this rig, you can create intricate curves for the most incredible psychedelic products). As the machine moved, the attached color-coded sensor moved around the room, mapping with the appropriate signal strength.