DHT22 sensor questions - Arduino Forum

| Arduino Forum :: Using Arduino :: Sensors :: DHT22 sensor questions

Pages: [1] Go Down

	Author	Topic: DHT22 sensor questions (Read 320 times)
0 Members and 1 Guest are viewing this topic.

mnxvolders

Offline

Newbie

Karma: 0

Posts: 26

DHT22 sensor questions

« on: November 05, 2012, 07:44:58 pm »

Bigger

Smaller

Reset

Hello,
I'm currently using the DHT22 sensor. I can read the data but i don't know how to put the sensor in stand by mode because i only need the data every +-5 minutes.


	Logged

mauried

Australia

Offline

Full Member

Karma: 6

Posts: 216

Re: DHT22 sensor questions

« Reply #1 on: November 05, 2012, 10:10:59 pm »

Bigger

Smaller

Reset

The sensor automatically goes into standby mode at the end of the reading cycle, and stays that way until you read it again.
It draws approx 50 uA in standby mode.


	Logged

robtillaart

Netherlands

Offline

Tesla Member

Karma: 101

Posts: 9553

In theory there is no difference between theory and practice, however in practice there are many...

Re: DHT22 sensor questions

« Reply #2 on: November 06, 2012, 01:44:37 pm »

Bigger

Smaller

Reset

possibly you could connect the 5V of the sensor to a digital pin and do digitalWrite(DHTVOLTAGE, HIGH);
place a transistor in between if the DHT draws too much current.

- http://arduino.cc/playground/Main/DHTLib -