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Low-cost digital temperature and humidity sensor — ideal for first projects and classroom experiments.
The DHT11 is the simplest way to measure room temperature and humidity. It reports 0–50 °C and 20–90 % RH over a single data wire, and the module includes the pull-up resistor so you only connect power, ground and one pin. Choose the DHT22 when you need wider range and better accuracy.
| Supply | 3.3 – 5 V |
|---|---|
| Temperature | 0 – 50 °C, ±2 °C |
| Humidity | 20 – 90 % RH, ±5 % |
| Sampling | Once per second |
| Interface | Single-wire digital |