cannot declare variable 'bmp280' to be of abstract type 'DFRobot_BMP280'

Using Arduino Programming Questions
1

Hi,

I've seen other people having similar issues but I'm unsure how to adapt their solutions to my problem, what I am trying to do is read sensor data off of this IMU with this code supplied by the manufacturer:

#include <Wire.h>
#include "DFRobot_BMP280.h"

DFRobot_BMP280 bmp280; 

void setup() {
 Serial.begin(9600);
 Serial.println("BMP280 demo");


 if (!bmp280.begin()) {  
   Serial.println("Could not find a valid BMP280 sensor!");
   while (1);
 }
}

void loop() {
   Serial.print("Temperature = ");
   Serial.print(bmp280.readTemperatureValue());
   Serial.println(" *C");

   Serial.print("Pressure = ");
   Serial.print(bmp280.readPressureValue());
   Serial.println(" Pa");

   Serial.print("Altitude = ");
   Serial.print(bmp280.readAltitudeValue(1013.25)); // this should be adjusted to your local forcase
   Serial.println(" m");

   Serial.println();
   delay(2000);
}

But I keep getting this error:

Arduino: 1.8.3 (Windows 10), Board: "Arduino/Genuino Uno"


altitude_10dof:20: error: cannot declare variable 'bmp280' to be of abstract type 'DFRobot_BMP280'
DFRobot_BMP280 bmp280; 

               ^


In file included from \\uol.le.ac.uk\root\student\home\s\sb715\My Documents\Arduino\altitude_10dof\altitude_10dof.ino:18:0:
\\uol.le.ac.uk\root\student\home\s\sb715\My Documents\Arduino\libraries\DFRobot_BMP280-master/DFRobot_BMP280.h:31:7: note:   because the following virtual functions are pure within 'DFRobot_BMP280':
class DFRobot_BMP280 {

      ^

\\uol.le.ac.uk\root\student\home\s\sb715\My Documents\Arduino\libraries\DFRobot_BMP280-master/DFRobot_BMP280.h:225:19: note: virtual void DFRobot_BMP280::writeReg(uint8_t, uint8_t*, uint16_t)
  virtual void    writeReg(uint8_t reg, uint8_t *pBuf, uint16_t len) = 0;

                  ^


\\uol.le.ac.uk\root\student\home\s\sb715\My Documents\Arduino\libraries\DFRobot_BMP280-master/DFRobot_BMP280.h:226:19: note: virtual void DFRobot_BMP280::readReg(uint8_t, uint8_t*, uint16_t)
  virtual void    readReg(uint8_t reg, uint8_t *pBuf, uint16_t len) = 0;

                  ^

\\uol.le.ac.uk\root\student\home\s\sb715\My Documents\Arduino\altitude_10dof\altitude_10dof.ino: In function 'void loop()':
altitude_10dof:34: error: 'class DFRobot_BMP280' has no member named 'readTemperatureValue'
    Serial.print(bmp280.readTemperatureValue());

                        ^


altitude_10dof:38: error: 'class DFRobot_BMP280' has no member named 'readPressureValue'
    Serial.print(bmp280.readPressureValue());

                        ^

altitude_10dof:42: error: 'class DFRobot_BMP280' has no member named 'readAltitudeValue'
    Serial.print(bmp280.readAltitudeValue(1013.25)); // this should be adjusted to your local forcase


                        ^

exit status 1
cannot declare variable 'bmp280' to be of abstract type 'DFRobot_BMP280'


This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.

I have all the library's requested so I'm unsure why it's unable to declare this variable

Any help would be much appreciated

Thanks,
Scott

2

Please post a link (using the chain links icon on the toolbar to make it clickable) to where you downloaded that library from. Or if you installed it using Library Manger (Sketch > Include Library > Manage Libraries in the Arduino IDE or Libraries > Library Manager in the Arduino Web Editor) then say so and state the full name of the library.

3

pert:
Please post a link

This was the page:

With the library for BMP280 being:

4

The DFRobot_BMP280 class has two pure virtual functions. The DFRobot_BMP280_IIC class implements those functions. You can't create an instance of a class that has pure virtual functions. You can only create instances of classes that have all real functions, such as DFRobot_BMP280_IIC.

5

If you want to see how to use the library correctly, take a look at File > Examples > DFRobot_BMP280 > read_data.

6