We have implemented a near-ultrasonic communication protocol in the 18.5-20 kHz band, which is inaudible to most humans, using commodity smartphone speakers and microphones to transmit and receive ...

This paper proposes a fully 3D-printed electromagnetic (EM) microfluidic sensor using rectangular substrate integrated waveguide (SIW) for liquid complex permittivity characterization. The proposed ...

Adaptive Cruise Control System using ESP32 and AWS IoT Core This project demonstrates a basic Adaptive Cruise Control (ACC) system that uses an ultrasonic sensor to detect distance, sends real-time ...