Weather station based on esp8266 and BME280 sensor. Upload to thingspeak.com every 1 minutes. Read data from sensor every 3 seconds and post them on serial and oled screen. Every 3 minutes i get data from openweathermaps.org.
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)