MEMS is a fascinating technology, the shortcut stands for Micro Electro Mechanical System and with this the company Bosch creates an incredible small sensor that measure environmental parameter: pressure, temperature and humidity.https://ae-bst.resource.bosch.com/media/_tech/media/datasheets/BST-BME280_DS001-12.pdfOf course this sensor needs and application. Ok, the idea to build a weather station isn't fancy but a good start into following projects. These are my visions :-) :
1. Arduino application running on ESP8266+BME280 which presents weather data by html with google charts
2. use solar power
3. build a MQTT based home automation with different sensors and actuators ( seems that is a job for the next years :-) )
4. implement other sensors like fine dust, this is currently a big issue in germany/europe