The ESP32 that I went for is specifically the ESP32-DevKitC, which is easy to find, cheap, and compatible with most things ...

High-precision measurement of permittivity and thickness enables advanced quality control of microwave substrates. In this article, a subwavelength planar microwave sensor is proposed, which is ...

Furthermore, the strong impedance matching between the microwave sensor and the human body enhances the efficacy of glucose detection. This work shows promise for advancing non-invasive blood glucose ...