BME680 datasheet & valid addresses | library

BME680 air quality sensor air quality sensor

The BME680 is a multifunctional environmental sensor that measures temperature, humidity, air pressure, and air quality (VOC gases). It’s compact, highly integrated, and designed for applications in smart homes, air purifiers, weather stations, and portable IoT devices. Featuring low power consumption and high measurement accuracy, the BME680 can continuously monitor environmental changes and easily connects to microcontrollers or MCUs through I²C or SPI interfaces, making it ideal for smart devices requiring precise environmental sensing.

BME680 Pinout

Note:

• For I²C operation, connect the CS pin directly to VDD, and use SDI as SDA.

• For SPI operation, use CS, SDI, SDO, and SCK accordingly.

BME680 Equivalent

When selecting a replacement for the BME680, consider the specific requirements of your application, such as the need for integrated sensing capabilities, power consumption constraints, and the necessity for AI-based gas detection.

BME680 sensor Arduino

First, we have two main power pins, VDD and VDDIO, typically connected to voltages between 1.8V and 3.3V. You’ll also notice two small capacitors (C11 and C12, each 0.1µF), which smooth out any power noise to keep the sensor stable.

Communication:
The BME680 can communicate through two common protocols—SPI or I²C. In this particular schematic, it’s using SPI, with clearly labeled pins:

SDI (pin 3): data input to the sensor.

SDO (pin 5): data output from the sensor.

SCK (pin 4): clock signal for timing.

CSB (pin 2): this is the chip select pin, active low, which tells the sensor when to start or stop communication.

BME680 vs BME280

• BME680 includes an additional gas sensor for VOC detection, making it suitable for advanced air-quality monitoring.

• BME280 focuses solely on temperature, humidity, and pressure measurements, ideal for standard environmental sensing tasks without gas detection needs.