💬 Air Humidity Sensor - DHT

[hek]

Yes, didn't see that one @mfalkvidd. Hmm.. Not sure I have the source photoshop psd available any more.

[mfalkvidd]

@hek you mean you delete files? :fearful:

[hek]

Ha, probably not, just a matter of find it. :sweat:

[skywatch]

What @Skywatch meant was that "#define DHT_DATA_PIN 2" is STILL in the example code on this page. Anyone who even gets as far as working it all out and wiring it all up and it still it won't work like that! - Not when it needs to be connected to PIN 3 instead (esp if the NRF is using pin 2, which is likely).
Happy New Year to you all! :)

[Efflon]

Just a note, tried following this for adding a DHT11 to the ESP8266 MQTT gateway. The MySensors example lib does not work with esp8266 (temperatures around 17000+). However the adafruit DHT library 1.3.0 works just fine.Any reason that couldn't be used here?

[hek]

Nope. Most of the examples were only verified using Atmega. If you find a better lib working on both platforms, please create a pull request including the updated example and library.

[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 ?...