BMP280 barometric pressure sensor module 3.3V for use with Arduino and other micro controllers
A very small barometric pressure sensor mounted on a breakout board, these units measure absolute barometric pressure and temperature data. As well as producing the sort of raw data you'd want for a weather station, the readings produced are accurate enough to calculate changes in altitude to around 1-metre accuracy.
The BMP280 provides more accurate measurements than the older BMP180 and offer ability to interface via either SPI or i2c (BMP180 modules are i2c only)
Dimensions 15mm * 12mm
Supplied with a 6-pin male header for you to solder if required.
These units require 3.3V supply but can cope with 5v i/o so are easily hooked up directly to 3.3V arduinos (Pro Mini, Pro Micro) or 5V Arduinos that have a 3.3V output (Nano or UNO)
The unit offers two i2C addresses: a default address of 0x76 and a second address of 0x77.
Libraries- there are several BMP280 libraries available to use with these units Most users tend to go for the AdaFruit BMP280 library If you want to use this in i2c mode then don't forget to tie the units Pin 6 to Pin 1 (VCC), as AdaFruit use 0x77 as the default address for their version, whereas non AdaFruit units (and Libraries) tend to default to an i2c address of 0x76