We will see how to interface BM e 280 sensor with STM 32. This sensor can measure the temperature, pressure and relative humidity. I have written a library for it, which I will upload on the GitHub and you can get it from there. As we progress along the project, I will also explain the code and how you can write one yourself using the datasheet. The library covers a lot of things, but there are still few things which you need to manually implement. So watch the project carefully as you might need to make changes in the library based on what requirements you have from the sensor. This is the datasheet for the device. Here I have highlighted few important things that I will cover in today's project. I will leave the link to this data sheet in the description. Let's start with cube ID and create a new project I am using STM 32 F 103 controller give some name to the project and click finish first of all I am enabling the external crystal for the clock. The blue pill have eight megahertz crystal on board and I want the system to run at maximum 72 megahertz clock. Enable the serial wire debug. The sensor can use both the eye to C and SPI for communication. You can use either of those but I am going to go with the eye to see enable the eye to see interface and leave everything to default.