Embedded Device Free Passive (EDfP) System: Sensitivity of ESP32

Internet of Things (IoT) concept fueled the commercial market to produce cheap, small and energy efficient IoT enablers working in a multitude of communication protocols. Among those, 802.11 WiFi based devices have a winning edge as WiFi infrastructure is ubiquitously available in Malaysia. In this study, we evaluate the sensitivity of an ESP32 to the presence of human entity in a residential living hall of 13.44 square meters. The key objective of this study is to prove the potential of an IoT enabler to perform Device Free Passive (DfP) tasks such as detection, localization and tracking of human entity using a single link with an Access Point (AP) without any intervention from an application server. The sensitivity is measured using embeddable deterministic methods on Received Signal Strength Indicator (RSSI) data. Sensitivity measurement using average and variance resulted with average accuracy of 100% and 73.5% respectively for human presence detection. In overall, it is possible to perform DIP tasks using IoT enablers especially ESP32.