Bosch has stepped up their game with their new BMP280 sensor. An environmental sensor with temperature, barometric pressure that is the next generation pressure sensor. This sensor is great for all sorts of weather sensing and can even be used in both I2C and SPI!

This precision sensor from Bosch is the best low-cost, precision sensing solution for measuring barometric pressure with ±1 hPa absolute accuracy, and temperature with ±1.0°C accuracy. Because pressure changes with altitude, and the pressure measurements are so good, you can also use it as an altimeter with ±1 meter accuracy

Specifications

• Input voltage:
• Operation range: Pressure: 300...1100 hPa / Temperature: -40…85°C
• Absolute accuracy (950...1050 hPa, 0…+40°C):  ~ ±1 hPa
• Relative accuracy p = 700…900hPa (Temp. @ 25°C): ± 0.12 hPa (typical) equivalent to ±1 m
• Average typical current consumption sensor (1 Hz data rate): 3.4 μA @ 1 Hz
• Average current consumption sensor (1 Hz data refresh rate): 2.74 μA, typical (ultra-low power mode)
• Average measurement time: 5.5 msec (ultra-low power preset)
• Resolution of data: Pressure: 0.01 hPa ( < 10 cm), Temperature: 0.01° C
• Temperature coefficient offset (+25°…+40°C @900hPa) : 1.5 Pa/K, equiv. to 12.6 cm/K

Documents:

• Datasheet
• Library