This is an experiment to see if barometric pressure and its time derivative can be correlated with weather conditions for up to 12 hours . Data is from Dark Sky relayed through an ESP8266 running Arduino code. Weather is in Centreville, Virginia.
This is my homemade digital anemometer. It is made of cups rotating with a magnet triggering a reed switch. The wires are connected to an Arduino Uno that calculates the time between consecutive pulses (after reed switch debouncing by my arduino software)