Good for 0-50☌ temperature readings ☒☌ accuracy.Good for 20-80% humidity readings with 5% accuracy.2.5mA max current use during conversion (while requesting data).You need external 10K or 4.7K pull up on data pin to VCC. If you are using module it comes with a 4.7K or 10K resistor. Compared to the DHT22, this sensor is less precise, less accurate and works in a smaller range of temperature/humidity, but its smaller and less expensive. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so when using our library, sensor readings can be up to 2 seconds old. Its fairly simple to use, but requires careful timing to grab data. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and spits out a digital signal on the data pin (no analog input pins needed). The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. Only 3 wires are needed: VCC, GND and the data line. The electric connection to the ESP32 DevKit is very simple, as the DHT series can be powered direct with 3.3V. The communicate with a ESP32 is over a single wire, but unfortunately it is not compatible with the 1-Wire protocol defined by Dallas Semiconductors. The DHT11 (or DHT22 and similar) are cheap temperature and humidity sensors. In this tutorial we are interfacing DHT11 or DHT22 Humidity temperature sensor with ESP32 DevKit.
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