DHT11 DHT 11 High Accuracy Temperature and Humidity Moisture Sensor Detect 3.3V 5V Module **FREE CABLE TechMakers

The DHT11 is a basic, ultra low-cost digital temperature and humidity sensor. 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). Its fairly simple to use, but requires careful timing to grab data. 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. Combined with a basic ADC chip inside that convert and spits out digital data at the DATA pin, which can be read easily from any 8 bit microcontroller.

TECHNICAL DETAILS:

- Low cost
- 3 to 5V power and I/O
- 2.5mA max current use during conversion (while requesting data)
- Good for 20-80% humidity readings with 5% accuracy
- Good for 0-50°C temperature readings ±2°C accuracy
- No more than 1 Hz sampling rate (once every second)
- 4 pins with 0.1" spacing

Tutorial & Coding:

Tutorial: https://goo.gl/KMgnnW

Code:  https://goo.gl/u9qL8z