Measuring Humidity with DHT11 Sensor

Posted on 09/07/2013 by c00kiemon5ter Posted in Arduino Tutorials — 2 Comments ↓

Required Hardware

• DHT11 Humidity Sensor
• Arduino Board
• Resistor 4.7K
• Breadboard
• Jumper Cables

The dht11 sensor is an economic way to sense the humidity of the air in arduino projects. Small size & low consumption & long transmission distance(20m) enable DHT11 to be suited in all kinds of harsh application occasions. Single-row packaged with four pins, making the connection very convenient.

Wiring DHT11 Sensor with Arduino

To wire your Humidity DHT11 Sensor to your Arduino, connect the following pins:

• DHT11 Pin 1 (Vss) –> Arduino +5V
• DHT11 Pin 2 (Signal) –> Arduino Pin 2
• DHT11 Pin 2 (Signal) –> Arduino +5V via Resistor 4.7K
• DHT11 Pin 3 –> N/C
• DHT11 Pin 4 (GND) –> Arduino Ground

Recommended Software

• none

Instructions and Code

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Tagged with: arduino, humidity, sensor, temperature

2 comments on “Measuring Humidity with DHT11 Sensor”

1. John Kitchen says:

   25/07/2015 at 11:36 pm

   Great, simple tutorial! I’ve used your tutorial for a couple of different projects now – Thanks!

   Reply
2. David says:

   15/09/2015 at 6:31 am

   Why the 4.7k resistor from signal to 5v? I have not seen that else where.

   Reply