Thanks to Bosch, now we’ve got a three-in-one, low-cost and high-precision environmental sensor, the Grove - Temp&Humi&Barometer Sensor (BME280).

It is based on their new BME280 sensor, which is even superior to BMP280 used in Grove – Barometer Sensor (BMP280), and any other former versions like BMP180 used in Grove – Barometer Sensor (BMP180).

The module provides precise measurement of not only barometric pressure and temperature, but also the humidity in the environment. The air pressure can be measured in a range from 300 hPa to 1100hPa with ±1.0 hPa accuracy, while the sensor works perfectly for temperatures between - 40 and 85 with an accuracy of ±1 . As for the humidity, you can get a humidity value with an error less than 3%.

Another great thing about this module is that, you don’t even need to worry about the I2C collisions as it provides both I2C and SPI interfaces.To use SPI, simply de-solder the bonding pads on the back. If you go with I2C, the board also provides 2 I2C addresses for you to select as you want.

Technical specification:

• Input Voltage: 3.3V or 5V
  
• Working current 0.4mA
  
• Operating Temperature: -40 to 85 Çalışma
  
• Atmospheric pressure sensor measuring range: ± 1.0 hPa with precision 300 - 1100 hPa  (1 hPa = face Pa)
  
• Moisture sensor measurements with ± 3% accuracy in the range of 0% to 100% relative humidity
  
• Measuring Modes: SPI, forced or periodic
  
• Compatible with Grove shield
  
• Dimensions: 40mm x20mm x15mm
  
• Weight: 10g
  
  

Technical Documents:

• Grove - Barometer Sensor (BME280) wiki
• Arduino GitHub Library
• BME280 Datasheet