Starting with Machine Learning on devices like MCU - Part 22 (Interfacing DHT11 Temp and Humidity Sensor to Arduino Nano BLE 33 board)

 

Above diagram shows the interfacing between the Arduino NANO 33 BLE board and DHT11 Temperature and Humidity sensor. The beauty of this interfacing is we need just 3 signals and DHT11 operates on 3.3V power supply.

DHT11 Pin	Connect To
VCC	3.3 V
GND	GND
DATA	Any digital pin (we’ll use D2)

The pin out, differences between the DHT11 and DHT22 sensor can be understood from the below link.

https://embeddeddesignblog.blogspot.com/2024/06/dht11-vs-dht22-what-are-differences.html