DHT11 Humidity and Temperature Sensor

The DHT11 is a low-cost digital temperature and humidity sensor providing calibrated digital output, operating from 3.3V to 5.5V, and capable of measuring humidity (20–90% RH) and temperature (0–50°C) with ±1%–2°C accuracy.

Key Features

• Sensing Capabilities: Measures temperature from 0°C to 50°C with ±2°C accuracy and relative humidity from 20% to 90% with ±5% accuracy.
• Digital Output: Provides a digital signal via a single-wire serial interface, making it easy to interface with microcontrollers like Arduino, Raspberry Pi, and ESP8266.
• Low Cost and Compact: Its small size and affordability make it suitable for DIY electronics, educational projects, and embedded IoT devices.
• Operating Voltage: Typically runs on 3.3V to 5V, consuming very little power, which allows use in battery-operated systems.

Key Specifications

• Temperature Range: 0°C to 50°C (±2°C accuracy)
• Humidity Range: 20% to 90% RH (±5% accuracy)
• Operating Voltage: 3.3–5.5V DC
• Operating Current: 0.3 mA (measuring), 60–150 μA (standby)
• Digital Output: Single-wire serial interface
• Resolution: 8-bit for both temperature and humidity
• Sampling Period: 1 second (1 Hz)

Typical Applications

• Home automation: Monitoring room temperature and humidity.
• Weather stations: Collecting environmental data in small-scale projects.
• HVAC systems: Basic monitoring of air conditions.
• IoT devices: Integrating environmental sensing in connected systems.