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How to connect Multiple Temperature Sensor DHT-11 to the IIC bus of the Arduino

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How to connect Multiple Temperature Sensor DHT-11 to the IIC bus of the Arduino

I understand that there is the SCL and the SDA pins on the Arduino.
The DHT-11 has 3 pins,  Vcc,GND and the DATA Pin.
It does NOT have the SCL pin, so how can I hook up multiple Temperature sensors to the IIC bus of the Arduino Uno.
asked Apr 18, 2017 by kiranshashi (140 points)

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hi,

DHT-11 work only on "One Wire" bus, you can`t conect this sensor to I2C bus. http://www.candrian.gr/index.php/dht-11-one-wire-bus/  look at this.

answered May 1, 2017 by giedrius (140 points)
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This is directly from the Adafruit web page: https://www.adafruit.com/product/385

Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin and the right most pin to ground. Although it uses a single-wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin! We have written an Arduino library with example code

You can use a digital multiplexer chip to select each unit or each one on it's own port. 

answered Jun 11, 2017 by gilshultzhome-com (17,730 points)

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