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Error unknown typ name 'DS18B20'

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  • M Offline
    M Offline
    mrjj
    Lifetime Qt Champion
    wrote on 11 Jul 2020, 11:13 last edited by
    #34

    Hi
    Seems to come from
    https://www.arduino.cc/reference/en/language/functions/interrupts/nointerrupts/

    So I think we are down the wrong path using this with a pi board as it seems tied to
    Arduino.

    A 1 Reply Last reply 11 Jul 2020, 11:18
    0
    • M mrjj
      11 Jul 2020, 11:13

      Hi
      Seems to come from
      https://www.arduino.cc/reference/en/language/functions/interrupts/nointerrupts/

      So I think we are down the wrong path using this with a pi board as it seems tied to
      Arduino.

      A Offline
      A Offline
      AlexKrammer
      wrote on 11 Jul 2020, 11:18 last edited by
      #35

      @mrjj
      and what will be the right way. is it possible to use qt for this?
      is it possible to create a own library to convert the input of the sensor in a temperatur?

      M 1 Reply Last reply 11 Jul 2020, 11:21
      0
      • A AlexKrammer
        11 Jul 2020, 11:18

        @mrjj
        and what will be the right way. is it possible to use qt for this?
        is it possible to create a own library to convert the input of the sensor in a temperatur?

        M Offline
        M Offline
        mrjj
        Lifetime Qt Champion
        wrote on 11 Jul 2020, 11:21 last edited by
        #36

        @AlexKrammer
        Hi
        But do you have such sensor ?
        and hook it up to the board like they do here ?
        https://www.circuitbasics.com/raspberry-pi-ds18b20-temperature-sensor-tutorial/

        A 1 Reply Last reply 11 Jul 2020, 11:26
        0
        • M mrjj
          11 Jul 2020, 11:21

          @AlexKrammer
          Hi
          But do you have such sensor ?
          and hook it up to the board like they do here ?
          https://www.circuitbasics.com/raspberry-pi-ds18b20-temperature-sensor-tutorial/

          A Offline
          A Offline
          AlexKrammer
          wrote on 11 Jul 2020, 11:26 last edited by
          #37

          @mrjj yea for sure. but i want to use qt with c++. do create this application

          M 1 Reply Last reply 11 Jul 2020, 11:31
          0
          • A AlexKrammer
            11 Jul 2020, 11:26

            @mrjj yea for sure. but i want to use qt with c++. do create this application

            M Offline
            M Offline
            mrjj
            Lifetime Qt Champion
            wrote on 11 Jul 2020, 11:31 last edited by
            #38

            @AlexKrammer
            I think you need a c++ lib then like
            https://github.com/TeraHz/DS18B20
            to interface with the hardware.

            A 2 Replies Last reply 11 Jul 2020, 11:39
            0
            • M mrjj
              11 Jul 2020, 11:31

              @AlexKrammer
              I think you need a c++ lib then like
              https://github.com/TeraHz/DS18B20
              to interface with the hardware.

              A Offline
              A Offline
              AlexKrammer
              wrote on 11 Jul 2020, 11:39 last edited by AlexKrammer 7 Nov 2020, 11:39
              #39

              @mrjj to interface with the hardware ill use wiringpi. thats work good. i can turn on und off leds and i can read pins.
              how does this lib work?

              1 Reply Last reply
              0
              • M mrjj
                11 Jul 2020, 11:31

                @AlexKrammer
                I think you need a c++ lib then like
                https://github.com/TeraHz/DS18B20
                to interface with the hardware.

                A Offline
                A Offline
                AlexKrammer
                wrote on 11 Jul 2020, 12:08 last edited by
                #40

                @mrjj ou i just saw. it looks like that one right?
                "are you using the DS18B20::DS18B20(const char* address) version"

                M 1 Reply Last reply 11 Jul 2020, 16:09
                0
                • A AlexKrammer
                  11 Jul 2020, 12:08

                  @mrjj ou i just saw. it looks like that one right?
                  "are you using the DS18B20::DS18B20(const char* address) version"

                  M Offline
                  M Offline
                  mrjj
                  Lifetime Qt Champion
                  wrote on 11 Jul 2020, 16:09 last edited by
                  #41

                  @AlexKrammer
                  Heh yes but on this is says it should work with PI
                  and it has more includes.
                  So maybe this will actually work once we find out what that address should be :)

                  A 1 Reply Last reply 13 Jul 2020, 10:43
                  0
                  • M mrjj
                    11 Jul 2020, 16:09

                    @AlexKrammer
                    Heh yes but on this is says it should work with PI
                    and it has more includes.
                    So maybe this will actually work once we find out what that address should be :)

                    A Offline
                    A Offline
                    AlexKrammer
                    wrote on 13 Jul 2020, 10:43 last edited by
                    #42

                    @mrjj
                    Now i tried to evaluate the temperatur with the c++ library.
                    The code looks good. There is no error, but if i run the projekt. its going to do this step

                    char w1_address [ 16 ];
                    DS18B20 w1Device1 (w1_address);
                    tempNow = w1Device1. getTemp ();
                    

                    its going to crash. So i think there is a mistake in the adress.
                    i put in the raspberry pin.

                    M 1 Reply Last reply 13 Jul 2020, 12:00
                    0
                    • A AlexKrammer
                      13 Jul 2020, 10:43

                      @mrjj
                      Now i tried to evaluate the temperatur with the c++ library.
                      The code looks good. There is no error, but if i run the projekt. its going to do this step

                      char w1_address [ 16 ];
                      DS18B20 w1Device1 (w1_address);
                      tempNow = w1Device1. getTemp ();
                      

                      its going to crash. So i think there is a mistake in the adress.
                      i put in the raspberry pin.

                      M Offline
                      M Offline
                      mrjj
                      Lifetime Qt Champion
                      wrote on 13 Jul 2020, 12:00 last edited by
                      #43

                      @AlexKrammer
                      im not sure a pin is right there.
                      Try read some the many tuts and see what they use for adress.

                      A 1 Reply Last reply 14 Jul 2020, 10:04
                      0
                      • M mrjj
                        13 Jul 2020, 12:00

                        @AlexKrammer
                        im not sure a pin is right there.
                        Try read some the many tuts and see what they use for adress.

                        A Offline
                        A Offline
                        AlexKrammer
                        wrote on 14 Jul 2020, 10:04 last edited by AlexKrammer
                        #44

                        @mrjj
                        Now it works.
                        i reached the slave-address each sensor, made a code like this

                        char w1_address[16];
                        const char* adr1  = "10-000803673bfb";
                        DS18B20 w1Device1 (adr1);
                        actualTemp1 = w1Device1.getTemp();
                        

                        And it's working.
                        But unfortunately if i add a new sensor. i have to find out his address and add it to the code. its not only plug and play^^

                        But now a basic c++ problem.
                        I created a class:
                        checktemperature.h

                        #ifndef CHECKTEMPERATURE_H
                        #define CHECKTEMPERATURE_H
                        
                        #include <settemperature.h>
                        #include <readtemperature.h>
                        #include <wiringPi.h>
                        
                        class CheckTemperature
                        {
                        private:
                            SetTemperature S;
                            ReadTemperature R;
                        public:
                            void CheckTemp();
                            float TempEin;
                            float TempAus;
                        };
                        
                        #endif // CHECKTEMPERATURE_H
                        
                        

                        checktemperature.cpp

                        #include "checktemperature.h"
                        
                        void CheckTemperature::CheckTemp()
                        {
                            TempEin = S.getHystTemperature();
                            TempAus = S.getHystTemperature();
                        
                            if (R.actualTemp1 <= TempEin) digitalWrite(31, LOW);
                            else if (R.actualTemp1 >= TempAus) digitalWrite(31, HIGH);
                        
                            if (R.actualTemp2 <= TempEin) digitalWrite(26, LOW);
                            else if (R.actualTemp2 >= TempAus) digitalWrite(26, HIGH);
                        
                            if (R.actualTemp3 <= TempEin) digitalWrite(27, LOW);
                            else if (R.actualTemp3 >= TempAus) digitalWrite(27, HIGH);
                        
                            if (R.actualTemp4 <= TempEin) digitalWrite(28, LOW);
                            else if (R.actualTemp4 >= TempAus) digitalWrite(28, HIGH);
                        
                            if (R.actualTemp5 <= TempEin) digitalWrite(29, LOW);
                            else if (R.actualTemp5 >= TempAus) digitalWrite(29, HIGH);
                        }
                        
                        

                        i call that funktion every 500ms in loop.
                        But the values of R.actualTemp and S.getHystTemperature the value does not adjust, so they still at the moment when i start the program.
                        Do you know whats wrong, cause i call that funktion every 500ms and at the beginning "TempEin= ..." and S.getHystTemperature(); is already changing^

                        M 1 Reply Last reply 14 Jul 2020, 10:22
                        0
                        • A AlexKrammer
                          14 Jul 2020, 10:04

                          @mrjj
                          Now it works.
                          i reached the slave-address each sensor, made a code like this

                          char w1_address[16];
                          const char* adr1  = "10-000803673bfb";
                          DS18B20 w1Device1 (adr1);
                          actualTemp1 = w1Device1.getTemp();
                          

                          And it's working.
                          But unfortunately if i add a new sensor. i have to find out his address and add it to the code. its not only plug and play^^

                          But now a basic c++ problem.
                          I created a class:
                          checktemperature.h

                          #ifndef CHECKTEMPERATURE_H
                          #define CHECKTEMPERATURE_H
                          
                          #include <settemperature.h>
                          #include <readtemperature.h>
                          #include <wiringPi.h>
                          
                          class CheckTemperature
                          {
                          private:
                              SetTemperature S;
                              ReadTemperature R;
                          public:
                              void CheckTemp();
                              float TempEin;
                              float TempAus;
                          };
                          
                          #endif // CHECKTEMPERATURE_H
                          
                          

                          checktemperature.cpp

                          #include "checktemperature.h"
                          
                          void CheckTemperature::CheckTemp()
                          {
                              TempEin = S.getHystTemperature();
                              TempAus = S.getHystTemperature();
                          
                              if (R.actualTemp1 <= TempEin) digitalWrite(31, LOW);
                              else if (R.actualTemp1 >= TempAus) digitalWrite(31, HIGH);
                          
                              if (R.actualTemp2 <= TempEin) digitalWrite(26, LOW);
                              else if (R.actualTemp2 >= TempAus) digitalWrite(26, HIGH);
                          
                              if (R.actualTemp3 <= TempEin) digitalWrite(27, LOW);
                              else if (R.actualTemp3 >= TempAus) digitalWrite(27, HIGH);
                          
                              if (R.actualTemp4 <= TempEin) digitalWrite(28, LOW);
                              else if (R.actualTemp4 >= TempAus) digitalWrite(28, HIGH);
                          
                              if (R.actualTemp5 <= TempEin) digitalWrite(29, LOW);
                              else if (R.actualTemp5 >= TempAus) digitalWrite(29, HIGH);
                          }
                          
                          

                          i call that funktion every 500ms in loop.
                          But the values of R.actualTemp and S.getHystTemperature the value does not adjust, so they still at the moment when i start the program.
                          Do you know whats wrong, cause i call that funktion every 500ms and at the beginning "TempEin= ..." and S.getHystTemperature(); is already changing^

                          M Offline
                          M Offline
                          mrjj
                          Lifetime Qt Champion
                          wrote on 14 Jul 2020, 10:22 last edited by
                          #45

                          @AlexKrammer
                          Hi
                          So it works fine the first time you run ?
                          Have you checked with debugger what happens when you read and set
                          R.actualTemp1 ?

                          Its hard to guess from this code.

                          A 1 Reply Last reply 14 Jul 2020, 10:29
                          0
                          • M mrjj
                            14 Jul 2020, 10:22

                            @AlexKrammer
                            Hi
                            So it works fine the first time you run ?
                            Have you checked with debugger what happens when you read and set
                            R.actualTemp1 ?

                            Its hard to guess from this code.

                            A Offline
                            A Offline
                            AlexKrammer
                            wrote on 14 Jul 2020, 10:29 last edited by AlexKrammer
                            #46

                            @mrjj
                            yes it works. its still working. Thats a other problem.
                            So R.actualTemp is the temperature from the sensor.
                            if i show the R.actualTemp is changing his value.
                            So if i show S.getHystTemperature(); its changing the value too.

                            But if i show e.g. TempEin its not changing the Value its always the value as i run the program.

                            A other example. If i put R,actualTemp into a variable in this class and im going to show the variable. its dont change the value too. If i show R.actualTemp its changing.

                            Are you understanding my problem?

                            M 1 Reply Last reply 14 Jul 2020, 10:41
                            0
                            • A AlexKrammer
                              14 Jul 2020, 10:29

                              @mrjj
                              yes it works. its still working. Thats a other problem.
                              So R.actualTemp is the temperature from the sensor.
                              if i show the R.actualTemp is changing his value.
                              So if i show S.getHystTemperature(); its changing the value too.

                              But if i show e.g. TempEin its not changing the Value its always the value as i run the program.

                              A other example. If i put R,actualTemp into a variable in this class and im going to show the variable. its dont change the value too. If i show R.actualTemp its changing.

                              Are you understanding my problem?

                              M Offline
                              M Offline
                              mrjj
                              Lifetime Qt Champion
                              wrote on 14 Jul 2020, 10:41 last edited by
                              #47

                              @AlexKrammer
                              Hi
                              Your naming confuses me a bit. :)
                              So S.getHystTemperature(); changes but
                              TempEin = S.getHystTemperature(); dont ?

                              A 1 Reply Last reply 14 Jul 2020, 10:58
                              0
                              • M mrjj
                                14 Jul 2020, 10:41

                                @AlexKrammer
                                Hi
                                Your naming confuses me a bit. :)
                                So S.getHystTemperature(); changes but
                                TempEin = S.getHystTemperature(); dont ?

                                A Offline
                                A Offline
                                AlexKrammer
                                wrote on 14 Jul 2020, 10:58 last edited by
                                #48

                                @mrjj
                                Ohhh im sry TempEin means TempOn, TempAus means TempOff:)
                                I like to show you my completely code but i dont know how:P

                                yes if i try to: qDebug() << S.getHystTemperature(); in mainwindow.cpp
                                the value is changing in relation when im moving the horizontal slider.
                                The same with R.actualTemp.
                                But if i try to: qDebug() << S.getHystTemperature(); in checktemperature.cpp
                                its taking the value of the veriable when i run the program. e.g. i declared in setTemperature.h "float HystTemperature;" So its got value 0;
                                So qDebug() just show 0.

                                In conclusion it can be said that in class CheckTemperature the variable and values do not adapt to the current values. They stuck on the values when the program start to run.

                                M 1 Reply Last reply 14 Jul 2020, 11:02
                                0
                                • A AlexKrammer
                                  14 Jul 2020, 10:58

                                  @mrjj
                                  Ohhh im sry TempEin means TempOn, TempAus means TempOff:)
                                  I like to show you my completely code but i dont know how:P

                                  yes if i try to: qDebug() << S.getHystTemperature(); in mainwindow.cpp
                                  the value is changing in relation when im moving the horizontal slider.
                                  The same with R.actualTemp.
                                  But if i try to: qDebug() << S.getHystTemperature(); in checktemperature.cpp
                                  its taking the value of the veriable when i run the program. e.g. i declared in setTemperature.h "float HystTemperature;" So its got value 0;
                                  So qDebug() just show 0.

                                  In conclusion it can be said that in class CheckTemperature the variable and values do not adapt to the current values. They stuck on the values when the program start to run.

                                  M Offline
                                  M Offline
                                  mrjj
                                  Lifetime Qt Champion
                                  wrote on 14 Jul 2020, 11:02 last edited by
                                  #49

                                  @AlexKrammer
                                  And you only have one instance of the CheckTemperature class?
                                  since S.getHystTemperature(); in mainwindow.cpp Works
                                  it should also in CheckTemperature so i wonder if you have 2 of them or something like that ?

                                  A 1 Reply Last reply 14 Jul 2020, 11:24
                                  0
                                  • M mrjj
                                    14 Jul 2020, 11:02

                                    @AlexKrammer
                                    And you only have one instance of the CheckTemperature class?
                                    since S.getHystTemperature(); in mainwindow.cpp Works
                                    it should also in CheckTemperature so i wonder if you have 2 of them or something like that ?

                                    A Offline
                                    A Offline
                                    AlexKrammer
                                    wrote on 14 Jul 2020, 11:24 last edited by AlexKrammer
                                    #50

                                    @mrjj
                                    no i only have one instance.
                                    i only have one checktemp in class CheckTemperature, one gethysttemperature() in class SetTemperature, and one actualTemp in class ReadTemperature.
                                    thats why im wondering too.
                                    cause im calling checktemp() every 500ms in loop mainwindow.

                                    Is there any possibility that i can't call object in a method of a single class. But there is no sense

                                    M 1 Reply Last reply 14 Jul 2020, 11:28
                                    0
                                    • A AlexKrammer
                                      14 Jul 2020, 11:24

                                      @mrjj
                                      no i only have one instance.
                                      i only have one checktemp in class CheckTemperature, one gethysttemperature() in class SetTemperature, and one actualTemp in class ReadTemperature.
                                      thats why im wondering too.
                                      cause im calling checktemp() every 500ms in loop mainwindow.

                                      Is there any possibility that i can't call object in a method of a single class. But there is no sense

                                      M Offline
                                      M Offline
                                      mrjj
                                      Lifetime Qt Champion
                                      wrote on 14 Jul 2020, 11:28 last edited by
                                      #51

                                      @AlexKrammer
                                      That is very odd then.
                                      The 500ms loop is a QTimer?

                                      Sorry I cant guess what could be wrong. It sounds like the parts are working but
                                      not in all use cases.

                                      A 1 Reply Last reply 14 Jul 2020, 11:31
                                      0
                                      • M mrjj
                                        14 Jul 2020, 11:28

                                        @AlexKrammer
                                        That is very odd then.
                                        The 500ms loop is a QTimer?

                                        Sorry I cant guess what could be wrong. It sounds like the parts are working but
                                        not in all use cases.

                                        A Offline
                                        A Offline
                                        AlexKrammer
                                        wrote on 14 Jul 2020, 11:31 last edited by
                                        #52

                                        @mrjj yes for sure. other thing in the loop are working. e.g. if i call directly in the loop every 500ms "ui->temperature4lable->setText(QString::number(S.getHystTemperature()));"
                                        the value changes every 500ms if i change the horizontal slider.

                                        M 1 Reply Last reply 14 Jul 2020, 11:33
                                        0
                                        • A AlexKrammer
                                          14 Jul 2020, 11:31

                                          @mrjj yes for sure. other thing in the loop are working. e.g. if i call directly in the loop every 500ms "ui->temperature4lable->setText(QString::number(S.getHystTemperature()));"
                                          the value changes every 500ms if i change the horizontal slider.

                                          M Offline
                                          M Offline
                                          mrjj
                                          Lifetime Qt Champion
                                          wrote on 14 Jul 2020, 11:33 last edited by
                                          #53

                                          Hi
                                          Ok but that
                                          S.getHystTemperature()
                                          seems out side of the CheckTemperature class, correct ?

                                          so you have
                                          SetTemperature S;
                                          ReadTemperature R;

                                          in mainwindow too ? and those works but
                                          inside the CheckTemperature they are not ?

                                          A 1 Reply Last reply 14 Jul 2020, 11:37
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