DS18B20 sensor code for arduino ide not working on platformio

Libraries
1

This is what i am trying to do,

class TEMP
{
private:

#define ONE_WIRE_BUS 26
OneWire oneWire(ONE_WIRE_BUS); 
DallasTemperature sensors(&oneWire);
public:
    TEMP();
    float getTemp();
};

and I have tried to crate them in the constructor but cannot return the values.

float TEMP::getTemp(){

}
TEMP::TEMP(){
    // Setup a oneWire instance to communicate with any OneWire devices  
// (not just Maxim/Dallas temperature ICs) 
OneWire oneWire(ONE_WIRE_BUS); 
// Pass our oneWire reference to Dallas Temperature. 
DallasTemperature sensors(&oneWire);
 sensors.begin(); 
}

Thanks

How can I create new object from the OneWire library and DallasTemperature library to use the sensor, vscode gives me this error.
image

2

We can’t say anything about this error without the platformio.ini.

3

this is my ini file

[env:esp32dev]
platform = espressif32
board = esp32dev
framework = arduino
lib_extra_dirs = ~/Documents/Arduino/libraries
4

Well this does not work anyways, you have to use use constructor initializer lists here. But the code you’ve shown that errors out is

See https://stackoverflow.com/a/11491003/5296568:

You can initialize the data members at the point of declaration, but not with () brackets:

Which means with a slight modifications this works

grafik
grafik730×770 43.2 KB

However, this is still all static data. What you should be doing is allow the class to have a construcot with the one wire pin and then forward that into the constructors of the underlying objects…

#include <Arduino.h>
#include <OneWire.h>
#include <DallasTemperature.h>

class TEMP
{
private:
    OneWire oneWire;
    DallasTemperature sensors;
public:
    TEMP(uint8_t pin) : 
        oneWire(pin), sensors(&oneWire) {}
    float getTemp() {
        DeviceAddress addr;
        sensors.getAddress(addr, 0);
        return sensors.getTempC(addr);
    }
};

#define ONE_WIRE_BUS 26
TEMP temp(ONE_WIRE_BUS);

void setup() {}
void loop() { float t = temp.getTemp(); }
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