The BME680 is a digital 4in1 sensor for humidity, pressure and temperature measurement based on proven sensing principles. Key features Digital interface: supports I2C with an onboard voltage regulator and a levelshift chip for reliable operation across different supply levels. Compatibility: direct compatibility with 3.3V and 5V systems. The SPI interface is reserved for future expansion, enabling easy integration in diverse designs. Compact and integrated: combines sensing capabilities with power regulation and level shifting in a compact package to simplify system design and reduce component count. Typical applications Indoor air quality monitoring, smart home automation and control, and Internet of Things (IoT) projects. Weather forecasting and environmental monitoring. GPSrelated enhancements such as timetofirstfix improvement, dead reckoning, and slope detection. Indoor navigation including floorchange detection and elevator detection. Outdoor navigation, leisure and sports tracking. Vertical velocity indication such as rise and sink speed. Benefits and practical advantages Provides a single, consolidated sensor solution for multiple environmental measurements, reducing board space and BOM. Flexible integration through I2C with optional SPI compatibility for future expansion. Easy system integration thanks to an onboard regulator and levelshift circuitry, supporting both 3.3V and 5V operating environments. Suitable for a wide range of applications from consumer smart devices to industrial monitoring and outdoor activities. Use scenarios Smart thermostat with realtime humidity, pressure and temperature readings to optimize heating, ventilation and air quality. Portable weather station or outdoor sensor node for precise ambient condition tracking and reliable data logging. Indoor navigation system in smart buildings to detect floor transitions and elevator movement, improving user experience and asset tracking.