Abstract: We investigate the problem of secure communication over parallel relay channel in the presence of a passive eavesdropper. We consider a four-terminal relay-eavesdropper channel which ...

So you want to control some mains electrical (or lower voltage) item using your phone, perhaps? This single ESP8266 plug-in controls a relay that is built in to the module. An Android app (.apk) ...

Abstract: This paper considers the use of energy harvesters, instead of conventional time-invariant energy sources, in wireless cooperative communication. For the purpose of exposition, we study the ...

This project provides firmware for an ESP32-based relay boards which you can find in great number at Aliexpress, Amazon or Botland. Alternatively, you can use this firmware if you want to contol any ...