The DHT11 is an ultra-low-cost, digital temperature and humidity sensor widely popular in the maker community for basic data logging, weather stations, and home automation. It uses a capacitive humidity sensor to measure relative humidity and a Negative Temperature Coefficient (NTC) thermistor to capture ambient temperature. Inside its distinctive blue plastic shell, an 8-bit microcontroller processes these analog readings and transmits them as a digital signal over a single-wire proprietary protocol.Key Technical SpecificationsThe core specifications include:

• Operating Voltage: 3V to 5.5V DC
• Current Consumption: 2.5mA maximum during data conversion
• Temperature Range: 0C to 50C (32F to 122F)
• Temperature Accuracy: 2.0C
• Humidity Range: 20% to 90% Relative Humidity (RH)
• Humidity Accuracy: 5.0% RH
• Sampling Rate: 1 Hz (one reading every second)