DHT11 and DHT22 temperature humidity sensor code

[Daniel Sitnik]

Cool!

I'm a complete newcomer to the hardware/circuit/IoT stuff and for my first hardware project I was thinking about doing something with the Omega and a DHTXX.

I've seen some examples of the DHTXX with Arduino and Raspberry, but I'm a little clueless about how to do it with the Omega since the output voltages seem to be different (only 2.8 for the Omega).

Can you please share a picture or diagram of your setup?!

[esunayg]

It works!

On pin 1 and +3.3V

Screenshot:

[Daniel Sitnik]

Mine works too!!

[Thomas Krampe]

I'm a C dummy, how can I use it on my onion. Is there something in Python available.

Thomas

[riccardoch]

@Thomas-Krampe Here an example in python:

# -*- coding: utf-8 -*-
import subprocess

pinNumber = 8
sensorModel = 'DHT11'

proc = subprocess.Popen(['./checkHumidity ' + str(pinNumber) + ' ' + sensorModel], stdout=subprocess.PIPE, shell=True)
(out, err) = proc.communicate()

sensor_data = out.split('\n')
humidity = sensor_data[0]
temperature = sensor_data[1]

print "Humidity:"
print str(humidity) + "%"

print "Temperature:"
print str(temperature) + "°C"

[Michael Ketslah]

@Riccardo-Chiarini this is the script that actually uses the same application. i don't think he was looking for that kind of an example

[József Schuck]

Hello!
I'm a real newbie and can't solve a problem. after the line checkHumidity/bin# ./checkHumidity 11 DHT11 it says: syntax error: unexpected "(" (expecting ")")
What does that mean? I'm really hopeless..

[WereCatf]

@József-Schuck You're using the Omega1 binaries. They don't work on the Omega 2.

[Felipe Cespedes]

@WereCatf Where the binaries for omega2 can be found? Thanks.

[h0l0gram]

Hi all
Good news. I migrated original code successfully to work on Omega2!
See https://github.com/h0l0gram/omega2-checkHumidity for binary and source.

Make sure your Omega2 has firmware >=0.1.10 b160 or it won't work.

root@Omega-1234:~# oupgrade -c
> Device Firmware Version: 0.1.10 b160
> Checking latest version online...
> Repo Firmware Version: 0.1.10 b160
> Comparing version numbers
> Device firmware is up to date!
root@Omega-1234:~# 

See https://docs.onion.io/omega2-docs/updating-the-omega.html

Example

root@Omega-1234:~/checkHumidity# ./checkHumidity 19 DHT22
48.299999
28.299999