Weather monitor/logger
In this project I wanted to try out different kinds of sensors and see how reliable and consistent they were, and analyze the data received. The initial idea was simply to log all data to an SD card, and swap it out once a month to recover the data periodically. This attempt did not work well, because of the microcontrollers difficulties at keeping the time, so I ended up just sending all the data to a Raspberry Pi 2, where a python script helped me collect the serial data to a file. The results can also be viewed live on an LCD on the arduino (the microcontroller)
Barometic pressure sensor (also indoor temperature)
Waterproof temperature sensor (-50C to +125C)
Air humidity sensor (and tempsensor down to 0C)
Raindrop sensor
A bit of cable mess :)
LCD with I2C interface module
The entire project: To the left: Raspberry pi, driven by a 2A 5V Micro USB charger. To the right: Arduino UNO, with all sensors connected, connected to the Pi via USB. (Cables to temp and humid sensors continue out the window)