Multiple DHT22 on same pin?

Using Arduino Sensors
1

Hi there,
I have studied hundrets of tutorials regarding arduino and all this stuff. (Had not yet chance to try some thing out)

My question is: Can I operate multiple DHT22 on the same wire?
There was no single tutorial, demonstrating this.

Thanks for your replies.

Cheers

2

No.
The DHT22 is not addressable, so if you have more than one on the same wire, they will both try and send their data at the same time, which will give garbage.

3

hmmm what a pitty...
Thanks for your Answer. I thought it is 1-Wire.

Is there a one wire humidity-sensor which is addressable?

4

The DHT22 uses in fact 3 wires: GND 5V and DATA.

if you want to multiplex you need to multiplex the DATA line.
You could try one of these - https://www.sparkfun.com/products/9056 - and multiplex up to 16 DHT's with only 4 address lines. Never tried it but it might work.

The DS18B20 is an addressable temp. sensor. However It does not provide humidity like the DHT22..

5

as my konwledge, NO for the one-wire communication...

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