Stephen Carey has developed a hot tub monitoring system using an ESP32 microcontroller that checks water quality every minute and reports it on a mobile dashboard. The system uses sensors to track pH levels, Oxidation-Reduction Potential (ORP), and temperature, providing insights into water quality and energy use. The ESP32 sends data through WiFi and can generate alerts when values drift outside acceptable ranges. The system also includes a calibration mode to check sensor accuracy. Carey found affordable sensor alternatives on AliExpress.
Roku has launched a Home Monitoring System SE kit that includes two entry sensors, a motion sensor, a hub, and a keypad for $99. The system can be monitored through a phone, Roku media players, and compatible TVs. The company has partnered with Wyze for the hardware and offers an optional professional monitoring service for $100 per year. The move into smart home products could help Roku supplement its core business while competing against Amazon and others.
Researchers have developed a 3D-RAPID system that uses a camera array and software algorithm to create a 3D visualization of freely moving organisms such as zebrafish and ants. The system features a 9x6 camera grid with 66% overlap between cameras, allowing for high-resolution imaging at high data rates. The recorded data is processed using a computational 3D reconstruction and stitching algorithm, which can be used to automatically determine the behavior of the organisms. Possible applications include developmental biology and pharmaceutics.
