💬 Air Humidity Sensor - DHT

[Efflon]

Ok! I just have to verify it on Atmega first. I'll be back..

[MLs]

DHT sketch version 2.1.0 no data i IDE seiel

And if i use DHT example sketch then I get data temp / hum

Did not have permission to post in the forum

[flopp]

@hek @mfalkvidd I read that you discussed about PIN 2 and 3.

Code say PIN 2, Wiring things up say PIN 2 and picture shows PIN 3.

It can't use PIN 2 or can it, PIN 2 is used by the radio, or am I to tired :)?

[meanmrgreen]

@flopp

thats the irq pin in the radio post.
Not used by the radio

[flopp]

@meanmrgreen said:

@flopp

thats the irq pin in the radio post.
Not used by the radio

I must have missed something or forgot. Is PIN 2 only used on Gateways?
Is it different between MyS version 1.x and 2.x?

[hek]

Tried to follow the history on the humidity file back in time on github.
At some point (2.0 release) the example was switched from HumiditySensor.ino (using pin 3) to DhtTemperatureAndHumiditySensor.ino (pin 2) created by @mozzbozz.

Not sure why the pin was switched, but you can run without the radio/IRQ-pin connection as long as not activating the MY_RX_MESSAGE_BUFFER_FEATURE.

[flopp]

@hek
All other examples are using PIN 3. Wouldn't it be easier to use PIN 3 for all examples? Maybe we shall wait and see if mozzbozz know why he changed to PIN 2.

[hek]

Ok, updated the example on github and instructions on the page back to pin 3.

[skywatch]

Hurrah! :)

Now I can sleep at night again ;)

Good job!

[hek]

@skywatch said:

Now I can sleep at night again

Haha, yeah, good to hear you will get a good nights sleep again.

[flopp]

@skywatch said:

Hurrah! :)

Now I can sleep at night again ;)

Good job!

haha, me too :)

[Pavel Larkin]

Hello. Maybe someone could help :) hopefully..
I have arduino1 with 1 DHT22, which is over arduinoGW connected to RSPi with latest domoticz.
when i connect stuff up, after some time i see some strange childids, not related to this arduino1 in no way.
Lots of unknown!, with V_TEMP values, with V_HUM values, even V_FORECAST, V_PRESSURE and etc. which arduino1 should not send (or no other arduino on my area).

Illustration:
<img href="http://www.lstudio.lt/wp-content/uploads/dht22problem.png">
http://www.lstudio.lt/wp-content/uploads/dht22problem.png

my code is quite simple (for ex only temperature is shown)

#define CHILD_DESCR "TEMP3"
#undef CHILD_ID
#define CHILD_ID 31
present(CHILD_ID, S_TEMP, CHILD_DESCR);
delay(250) ;

loop:

  temp3=dht3.readTemperature();

if (temp3 >= 120) {temp3 = lasttemp3;}
if (temp3 <= -50) {temp3 = lasttemp3;}
MyMessage msg31(CHILD_ID,V_TEMP);
send(msg31.set(temp3,1));

so.. that is basically all

[flopp]

@Pavel-Larkin

I have also seen this, I noticed it last week. Some of my Nodes have those Unknown-child, but it is working correctly anyway.
DZ 3.5877, MyS 1.5.1, RPi 2

[Gimlur]

Hello,
i have a problem with this sketch.
After downloading DTH.h froom Mysensors Examples, i have this error :
DhtTemperatureAndHumiditySensor:85: error: 'getConfig' was not declared in this scope

metric = getConfig().isMetric;

Any Idea of my mistake ?...

[hek]

It isn't your mistake, it's ours. The examples hasn't been updated correctly to reflect the most recent change in the api.

It should say getControllerConfig().isMetric

[johnecy]

I have the dht22 sensor hooked up and working on a pro mini on pin 3 I get a normal temp reading but the humidity always stays at 1.0 does not read.

[mfalkvidd]

@johnecy https://forum.mysensors.org/topic/5978/temperature-and-humidity-dht22

[donhuan78p]

Hello everybody,
hope, someone could help a newby :-)
I've installed the MQTT - GW and would use the Air/Humidity - sensor. But it doesn't work properly.
The Connection to the Gateway seems to be okay. But I get no Air/Humidity - Information.
The sensor does not measure anything.
I've tried to change the data - pin, I've tried the DHT11 and DHT22 - sensor. No choice.
I'm getting mad :-)

Thanks a lot.

[gohan]

Have you tried the basic arduino sketch that prints data to serial port?

[donhuan78p]

Hello,
thanks a lot for your answer.
Yes, I did. It produced the Messages as excepted.