DHT11 Sensor

The DHT11 Temperature and Humidity Sensor is a widely used, ultra-low-cost digital sensor designed for hobbyists and professionals alike. It combines a capacitive humidity sensor and a thermistor to measure the surrounding air, providing a calibrated digital signal output. The sensor operates at 3.5V to 5.5V DC and communicates via a single-wire serial interface, making it extremely easy to integrate with microcontrollers like Arduino, Raspberry Pi, and ESP32. Key features include a measurement range of 20-90% RH for humidity and 0-50°C for temperature, with an accuracy of ±5% RH and ±2°C. It comes in a compact 4-pin package, often mounted on a small PCB module that includes a pull-up resistor and an LED indicator for power status. Common applications include home automation, weather stations, HVAC systems, and data logging projects. Choose the DHT11 for its simplicity, reliability, and cost-effectiveness in basic environmental sensing tasks.