One of our interests is weather monitoring. It seems like a natural thing for a ham radio operator to be interested in, so we applied our micro-controller expertise and came up with the following project. In it’s current version, it tracks humidity and temperature, but we have plans for adding barometric pressure (we blew up our first baro chip), wind speed & direction, a rain gauge, and solar intensity. It can also be used as a thermostat / climate control system.
We used a Sensiron SHT-21 Temp/humidity module, a Arduino Uno, and a 4 line white on blue LCD. If you have problems finding the SHT-21, I’ve been told the DHT-11 is a good (much cheaper) substitute, but I’m sure there will be code differences. Here is how we built ours:
You can also get a complete kit that has all the pieces!