DHT ProShield DHT-22 - (Wemos D1 Mini)

The DHT ProShield is a digital sensor shield for the Wemos D1 Mini, featuring the DHT-22 (also known as A22) temperature and humidity sensor. It provides accurate environmental readings, making it suitable for weather stations or climate monitoring projects.

The sensor communicates via a 1-Wire protocol on pin D4 of the Wemos D1 Mini. For reliable readings, maintain an interval of at least 2 seconds between measurements, as the sensor performs a new acquisition after each read.

Specifications

• SENSOR : DHT-22 (Sensirion SHT21 compatible)
• TEMPERATURE RANGE : -40 to 80 °C (accuracy ±0.5 °C)
• HUMIDITY RANGE : 0 to 99.9% RH (accuracy ±2% RH)
• INTERFACE : 1-Wire on pin D4
• COMPATIBILITY : Wemos D1 Mini (ESP8266)

Wiring

Software and Libraries

For use with the Arduino IDE, install the Adafruit DHT sensor library. A pre-configured example is available in the IDE: File > Examples > D1_mini_Examples > 04.Shields > DHT_Shield.

For NodeMCU (Lua) usage, you can compile a custom firmware via the NodeMCU custom build service, then flash it using esptool-ck. Refer to the NodeMCU documentation for the dht module usage.