TL;DR
The article discusses a project that creates a “freshness checker” for milk using gas sensors. Instead of relying on the traditional sniff test, which can be unreliable if your sense of smell is compromised, this device utilizes an SGP30 gas sensor to detect the presence of gases emitted by spoiled milk. The project is built around a CLUE board, which is a microcontroller designed to work with sensors and displays.