DHT11 Temperature and Humidity Sensor

The DHT11 is a low-cost digital sensor used to measure temperature and relative humidity. It outputs calibrated digital data, making it very easy to use with Arduino, ESP32, ESP8266, and Raspberry Pi.

It is commonly available in two versions:

• 🔹 Bare 4-pin sensor

• 🔹 Module with PCB (3-pin: VCC, GND, DATA)

🔹 Key Features

• Measures temperature & humidity

• Digital single-wire communication

• Factory calibrated

• Low power consumption

• Beginner-friendly

🔹 Technical Specifications

• Temperature Range: 0°C to 50°C

• Humidity Range: 20% to 90% RH

• Temperature Accuracy: ±2°C

• Humidity Accuracy: ±5% RH

• Operating Voltage: 3.3V – 5V

• Sampling Rate: 1 reading per second

🔹 Applications

• Weather monitoring systems

• Smart home automation

• Indoor climate monitoring

• IoT environmental projects

• DIY electronics learning projects