Questions tagged [dht22]

a low cost humidity and temperature sensor with a single wire digital interface. The sensor is calibrated and doesn’t require extra components so you can get right to measuring relative humidity and temperature.

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99% humidity during the night and indoors using DHT22

I've been playing with the DHT22, but the humidity values are very intriguing. During the night or indoors the sensor is returning 99%. While the temperature values looks good. Here is a ...
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Windows 10 iot, Raspberry Pi 2, DHT22/AM2302 Sensor Not Receiving Data

Currently I am using the DHT22/AM2302 which has a built in 5.1k resistor, using the program provided from https://ms-iot.github.io/content/en-US/win10/samples/GpioOneWire.htm and connected the sensors ...
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2answers
296 views

AM2302 no signal using Raspberry Pi 3

I am trying to setup a AM2302 (DHT22) to use with Raspberry Pi, and unable to get a signal. What I need help is to be able to conclude whether the problem is due to (1) sensor fault (2) wiring fault (...
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Using Raspberry Pi to Receive Float from Arduino using NRF24L01

Good day. I've been learning on how to transfer data from Arduino to Raspberry Pi wirelessly using NRF24L01 based on the following reference: Raspberry Pi 3 Tutorial 14 – Wireless Pi to Arduino ...
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0answers
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DHT22 not working on Raspberry Pi2

I have DHT22 sensor hooked up to my Raspberry Pi2 running default Raspbian image. I have similar setup on Raspberry Pi B and it is working. I am using Adafruit library for DH22. However when I try ...
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My Relay suddenly turns on and off, and this happens in a second

Well, I had written a code for Automatic Cooling with DHT 11, but I did not get any successful result in it, I want the Relay turn on when the humidity rises up, and I did not have any errors in my ...
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369 views

DHT22 Sensor not working

I'm using a Pi 3 running Raspbian with a DHT22 sensor. When I run the DHT22 code: import Adafruit_DHT from time import sleep DELAY_INTERVAL = 0.3 dht_sensor = Adafruit_DHT.DHT22 DHT_PIN = 4 while ...
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146 views

DHT22 temp sensor. Randomly showing -11.1

I have two DHT22 sensors, connected to GPIO 4 AND GPIO 22 and 3.3V. It randomly shows -11.1 or 11.1 as output occasionally. See the sample log of polling it every few seconds using the "AdafruitDHT.py"...
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744 views

How to determine if DHT22 is working?

I got this DHT22 sensor (COM-FOUR DHT22 AM2302) but I'm not able to extract any data from it... Current setup is Rpi2 -> Breadboard -> DHT22 Pi is based on standard configuration where I've only ...
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1answer
82 views

Can I use a DHT22 sensor with the servo hat installed on my RPi-3?

the title pretty much says it all... My son an I are doing some robotics experimenting with the RPi-2 and RPi-3, we are using the Servo Hat to control several servos on them. We would like to ...
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Raspberry Pi 2 : DHT11 : Oracle Java ME Embedded

Anyone integrated DHT11 temperature sensor on Raspberry Pi2 with Oracle Java ME Embedded system? Any direction will be helpful.