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A very compact barometer that works with I2C or SPI. The BME280 is an 3-in-1 module that can measure temperature, pressure and humidity.
For more information see the datasheet under the tab "Downloads and Links".
The module can only be powered with 3.3VDC. The I2C/SPI only works on 3.3V, therefore a level converter is required when using a 5V Arduino. Or the level converter version can be used.
The module uses I2C by default and the default I2C address of this module is 0x76. This may need to be changed from 0x77 to 0x76 in the example code / library. If you connect the SDO pin with Vcc, then the I2C address becomes 0x77.
If you want to use the module with SPI, you have to connect the CSB pin to GND.
Notice: The picture is based on the BMP280 module, but the supplied module has a BME280.