Summary
- An enhanced spectrum analysis tool that maps WiFi signals in the 2.4 GHz band in real time has been developed by maker Jeija.
- Called ESPARGOS, it uses an array of eight ESP32-S2FH4 microcontrollers and eight 2.4 GHz WiFi patch antennas to detect WiFi packets.
- It can then visualise the strengths of the signals, and where they come from, using a heat map on an image of the same setting.
- This allows the user to see where signals originate, what objects they reflect off, and whether they penetrate certain materials.
- Jeija also used two arrays to detect a moving WiFi source, similar to a system that triangulates positional data.
- The innovation could have many applications, including using machine learning to detect objects behind walls.
By Dan Maloney
Original Article