With the DHT22 sensor the D1 Mini can be expanded to include a measurement option for temperature and humidity. • Humidity measurement range: 0 - 100% • Temperature measurement range: -40 - +80°C • Humidity tolerance: ± 2 - 5% • Temperature tolerance: ± 0.5°C. • Sampling rate: 0.5 Hz (every 2 seconds) Pin assignment • 3.3 V: 3.3-V power supply • D4: Data Pin • GND: Earth Note: Delivery includes 6 pin headers (2x 8-pin male–male, male–female, male long pin–female) https://elecena.pl/product/18047857/d1-shield-temperature-humidity-sensor-dht22 2021-04-29 https://elecena.pl/product/18047857/d1-shield-temperature-humidity-sensor-dht22 2022-06-07