Abstract: This article presents a novel liquid level monitoring system based on passive ultrahigh-frequency (UHF) radio frequency identification (RFID) technology, which is designed to provide ...

Abstract: Radio-frequency (RF) signal transmission is highly susceptible to environmental factors such as the properties of materials. This paper presents an analysis of an ultra-high frequency (UHF) ...

ESP32 → SD 卡模組 GPIO32 → CS GPIO25 → SCK GPIO27 → MOSI GPIO26 → MISO 5V → VCC GND → GND /audio/ ├── MAHJONG_TON_1.wav (一筒) ├── MAHJONG_TON_2.wav (二筒) ├── ... ├── MAHJONG_SUO_1.wav (一索) ├── ...

From its inception in 2001, SALTO was created with one objective: to devise a world-class access control system that was simple to use and extremely efficient, giving users the ability to control all ...