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  1. Home
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  3. 💬 Air Humidity Sensor - DHT

💬 Air Humidity Sensor - DHT

Scheduled Pinned Locked Moved Announcements
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  • hekH Offline
    hekH Offline
    hek
    Admin
    wrote on last edited by
    #41

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

    1 Reply Last reply
    0
    • skywatchS Offline
      skywatchS Offline
      skywatch
      wrote on last edited by
      #42

      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! :)

      1 Reply Last reply
      1
      • EfflonE Offline
        EfflonE Offline
        Efflon
        wrote on last edited by
        #43

        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?

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        0
        • hekH Offline
          hekH Offline
          hek
          Admin
          wrote on last edited by
          #44

          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.

          1 Reply Last reply
          0
          • EfflonE Offline
            EfflonE Offline
            Efflon
            wrote on last edited by
            #45

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

            1 Reply Last reply
            0
            • M Offline
              M Offline
              MLs
              wrote on last edited by
              #46

              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

              1 Reply Last reply
              0
              • F Offline
                F Offline
                flopp
                wrote on last edited by flopp
                #47

                @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 :)?

                meanmrgreenM 1 Reply Last reply
                1
                • F 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 :)?

                  meanmrgreenM Offline
                  meanmrgreenM Offline
                  meanmrgreen
                  wrote on last edited by
                  #48

                  @flopp

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

                  F 1 Reply Last reply
                  0
                  • meanmrgreenM meanmrgreen

                    @flopp

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

                    F Offline
                    F Offline
                    flopp
                    wrote on last edited by flopp
                    #49

                    @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?

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                    • hekH Offline
                      hekH Offline
                      hek
                      Admin
                      wrote on last edited by
                      #50

                      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.

                      F 1 Reply Last reply
                      0
                      • hekH 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.

                        F Offline
                        F Offline
                        flopp
                        wrote on last edited by
                        #51

                        @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.

                        1 Reply Last reply
                        0
                        • hekH Offline
                          hekH Offline
                          hek
                          Admin
                          wrote on last edited by hek
                          #52

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

                          1 Reply Last reply
                          3
                          • skywatchS Offline
                            skywatchS Offline
                            skywatch
                            wrote on last edited by
                            #53

                            Hurrah! :)

                            Now I can sleep at night again ;)

                            Good job!

                            F 1 Reply Last reply
                            2
                            • hekH Offline
                              hekH Offline
                              hek
                              Admin
                              wrote on last edited by
                              #54

                              @skywatch said:

                              Now I can sleep at night again

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

                              1 Reply Last reply
                              0
                              • skywatchS skywatch

                                Hurrah! :)

                                Now I can sleep at night again ;)

                                Good job!

                                F Offline
                                F Offline
                                flopp
                                wrote on last edited by
                                #55

                                @skywatch said:

                                Hurrah! :)

                                Now I can sleep at night again ;)

                                Good job!

                                haha, me too :)

                                1 Reply Last reply
                                0
                                • Pavel LarkinP Offline
                                  Pavel LarkinP Offline
                                  Pavel Larkin
                                  wrote on last edited by gohan
                                  #56

                                  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

                                  F 1 Reply Last reply
                                  0
                                  • Pavel LarkinP 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

                                    F Offline
                                    F Offline
                                    flopp
                                    wrote on last edited by flopp
                                    #57

                                    @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

                                    1 Reply Last reply
                                    0
                                    • GimlurG Offline
                                      GimlurG Offline
                                      Gimlur
                                      wrote on last edited by
                                      #58

                                      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 ?...

                                      1 Reply Last reply
                                      1
                                      • hekH Offline
                                        hekH Offline
                                        hek
                                        Admin
                                        wrote on last edited by
                                        #59

                                        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

                                        1 Reply Last reply
                                        2
                                        • johnecyJ Offline
                                          johnecyJ Offline
                                          johnecy
                                          wrote on last edited by
                                          #60

                                          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.

                                          mfalkviddM 1 Reply Last reply
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