The DHT-11 is a reliable, low-cost sensor designed to measure both temperature and humidity in the surrounding air. Equipped with a capacitive humidity sensor and a thermistor, it delivers data as a digital signal via its data pin, eliminating the need for analog input handling.

Although simple to use, the DHT-11 requires precise timing to capture data correctly. A key limitation is its ability to refresh data only once every two seconds, so it’s best to set your code to read sensor values at intervals of two seconds or longer. While it lacks the accuracy and range of the DHT22, it remains a practical option for projects where size and cost are key factors.

Compact and easy to integrate, the DHT-11 is ideal for basic applications where size and cost-efficiency take precedence over high precision.