Real-Time Collection of Electromagnetic Field Measurements Using a Metropolitan Wireless Mesh Network

We present a system for real-time collection of electromagnetic field (EMF) measurements. The two innovative features of the system that differentiate it from other similar monitoring systems are the use of a low-cost EMF measurement device and the collection and access of measurements through a metropolitan wireless mesh network. The low-cost EMF measurement device is connected to a mini-ITX based PC, and both are located in a water-proof enclosure. The EMF monitoring node is connected to a metropolitan wireless mesh network, which we have deployed in the city of Heraklion, Crete. A set of software module are responsible for collecting, processing, and presenting the EMF measurements in the form of graphs that are accessible from a web browser. The software modules support per-band, per-operator, and time-series monitoring, in addition to on-demand monitoring of a specific frequency range and time interval.