
This enables a SPI device such as the pressure sensor to be connected to any Arduino pins. Software SPI refers to using the Arduino SPI driver to emulate SPI hardware using "bit banging".

Also see the GY-BMP280-3.3 pressure sensor module pinout for pin numbering and circuit diagram of the module pictured below. It contains a BMP280 sensor from Bosch that can measure both atmospheric pressure as well as temperature. The image below shows the pressure sensor module used in this tutorial. This is easily done as the library can be installed from within the Arduino IDE without the need for a complicated manual installation. To use the pressure sensor module, a library must be installed in the Arduino IDE. The module operates from 3.3V and is not 5V tolerant, so it is important to wire it correctly to 5V Arduinos using level shifters and 3.3V for power.


Either I☬ or SPI interfaces can be used to connect the module to Arduino.
