DHT11 HUMIDITY AND TEMPERATURE SENSOR MODULE 

The DHT11 Humidity and Temperature Sensor Module is a cost-effective digital sensor designed to measure ambient temperature and relative humidity. It integrates a resistive humidity sensing element, an NTC temperature sensor, and an onboard microcontroller to provide calibrated, accurate digital readings.

The module version includes convenient onboard components such as a pull-up resistor and indicator LED, allowing direct interfacing with microcontrollers like Arduino, ESP32, ESP8266, Raspberry Pi, and PLC systems. It communicates using a simple single-wire digital protocol, providing easy integration into IoT devices, educational projects, and environmental monitoring applications.

The humidity sensor measures relative humidity based on resistance changes, while the NTC sensor detects ambient temperature. The microcontroller processes these signals and outputs digital values with a temperature range of 0°C–50°C (±2°C accuracy) and a humidity range of 20%–90% RH (±5% RH accuracy). The module has a sampling rate of approximately 1 reading per second, making it suitable for basic monitoring tasks.

Applications include indoor and outdoor environmental monitoring, weather display projects, smart home and automation systems, educational experiments, and IoT or DIY electronics projects. Its compact design, low power consumption, and digital output make the DHT11 module an ideal choice for beginners and hobbyists looking for a reliable, easy-to-use temperature and humidity sensor.