The TnH and AQI Probe equipped with the BME680 sensor is a high-performance environmental sensing device designed for IoT, industrial, and indoor air-quality monitoring applications. It measures Temperature (–40°C to +85°C), Humidity (0–100% RH), and Air Quality Index (0–500) with high stability and accuracy. The digital I2C interface enables easy integration with microcontrollers, embedded systems, automation platforms, and smart-building applications. With its compact design, low-power operation, and excellent long-term stability, this probe is ideal for HVAC systems, indoor air quality monitoring, smart home devices, and IoT-based environmental sensing.