Error compiling with mpu6050 (undefined reference)

Jobin7 · June 5, 2018, 10:30am

Hello I am an extreme beginner
I am using nodemcu 1.0 (ESP 12E moule)
ARDUINO-1.8.5

flash size - 4M (3M SPIFFS)
Debug port -Serial
Debug Level - None
IwIP Varriant - v2 lower memorry
CPU Frequency - 80Mhz
Speed Level- 115200
erase flash- sketch only

THIS IS THE CODE THAT I AM TRYING TO COMPILE
undefined reference to `MPU6050

full error message is attached with the message

whenever I compile the file i get the following error messages which I have copied in the attached file

PLEASE CAN ANYONE HELP ME WITH IT, I AM STUCK HERE SINCE 1 WEEK

THANKS IN ADVANCE

error message.txt (14.5 KB)

code.txt (12.5 KB)

pylon · June 5, 2018, 11:37am

Uncomment the MPU6050.h include. The include may not be necessary from a C compiler standpoint but the IDE magic to get the necessary libraries for the linker may need it.

Jobin7 · June 5, 2018, 11:55am

Thank you very much for your help but I am getting the same message.
even if I try to compile MPU6050 DMP6 I get the same error

pylon · June 5, 2018, 2:24pm

How did you install the MPU6050 library? Did you use the library manager of the IDE?

Jobin7 · June 5, 2018, 3:15pm

I had installed a library named - mpu6050 from library manager and also added mpu6050.h file in the folder containing the ino file

pylon · June 5, 2018, 3:57pm

Remove that mpu6050.h file in the same folder as the .ino file. If it’s there the IDE expects the corresponding library code to be in the same folder.

Jobin7 · June 6, 2018, 7:52am

Thanks for your answer sir but it is still showing an error message its different than the previous one

ERROR MESSAGE-

Arduino: 1.8.5 (Windows 7), Board: "NodeMCU 1.0 (ESP-12E Module), 80 MHz, 4M (3M SPIFFS), v2 Lower Memory, Disabled, None, Only Sketch, 9600"

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: In member function 'float Quaternion::getMagnitude()':

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:74:46: error: 'sqrt' was not declared in this scope

             return sqrt(w*w + x*x + y*y + z*z);

                                              ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: At global scope:

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:94:9: error: 'int16_t' does not name a type

         int16_t x;

         ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:95:9: error: 'int16_t' does not name a type

         int16_t y;

         ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:96:9: error: 'int16_t' does not name a type

         int16_t z;

         ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:104:29: error: expected ')' before 'nx'

         VectorInt16(int16_t nx, int16_t ny, int16_t nz) {

                             ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: In constructor 'VectorInt16::VectorInt16()':

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:99:13: error: 'x' was not declared in this scope

             x = 0;

             ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:100:13: error: 'y' was not declared in this scope

             y = 0;

             ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:101:13: error: 'z' was not declared in this scope

             z = 0;

             ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: In member function 'float VectorInt16::getMagnitude()':

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:111:25: error: 'x' was not declared in this scope

             return sqrt(x*x + y*y + z*z);

                         ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:111:31: error: 'y' was not declared in this scope

             return sqrt(x*x + y*y + z*z);

                               ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:111:37: error: 'z' was not declared in this scope

             return sqrt(x*x + y*y + z*z);

                                     ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:111:40: error: 'sqrt' was not declared in this scope

             return sqrt(x*x + y*y + z*z);

                                        ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: In member function 'void VectorInt16::normalize()':

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:116:13: error: 'x' was not declared in this scope

             x /= m;

             ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:117:13: error: 'y' was not declared in this scope

             y /= m;

             ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:118:13: error: 'z' was not declared in this scope

             z /= m;

             ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: In member function 'VectorInt16 VectorInt16::getNormalized()':

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:122:27: error: 'x' was not declared in this scope

             VectorInt16 r(x, y, z);

                           ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:122:30: error: 'y' was not declared in this scope

             VectorInt16 r(x, y, z);

                              ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:122:33: error: 'z' was not declared in this scope

             VectorInt16 r(x, y, z);

                                 ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: In member function 'void VectorInt16::rotate(Quaternion*)':

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:138:29: error: 'x' was not declared in this scope

             Quaternion p(0, x, y, z);

                             ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:138:32: error: 'y' was not declared in this scope

             Quaternion p(0, x, y, z);

                                ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:138:35: error: 'z' was not declared in this scope

             Quaternion p(0, x, y, z);

                                   ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: In member function 'VectorInt16 VectorInt16::getRotated(Quaternion*)':

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:153:27: error: 'x' was not declared in this scope

             VectorInt16 r(x, y, z);

                           ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:153:30: error: 'y' was not declared in this scope

             VectorInt16 r(x, y, z);

                              ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:153:33: error: 'z' was not declared in this scope

             VectorInt16 r(x, y, z);

                                 ^

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp: In member function 'float VectorFloat::getMagnitude()':

C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050\helper_3dmath.h.cpp:178:40: error: 'sqrt' was not declared in this scope

             return sqrt(x*x + y*y + z*z);

                                        ^

Multiple libraries were found for "Wire.h"
 Used: C:\Users\JOBIN JESSI\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.1\libraries\Wire
 Not used: C:\Users\JOBIN JESSI\Documents\Arduino\libraries\MPU6050
Multiple libraries were found for "EEPROM.h"
 Used: C:\Users\JOBIN JESSI\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.4.1\libraries\EEPROM
 Not used: C:\Users\JOBIN JESSI\Documents\Arduino\libraries\arduino-NVM
exit status 1
Error compiling for board NodeMCU 1.0 (ESP-12E Module).
Invalid library found in C:\Users\JOBIN JESSI\Documents\Arduino\libraries\Arduino-PID-Library-master: C:\Users\JOBIN JESSI\Documents\Arduino\libraries\Arduino-PID-Library-master
Invalid library found in C:\Users\JOBIN JESSI\Documents\Arduino\libraries\Arduino-PID-Library-master: C:\Users\JOBIN JESSI\Documents\Arduino\libraries\Arduino-PID-Library-master

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

Jobin7 · June 6, 2018, 10:25am

Please can anyone help me out with this problem I am stuck here since a week

Lys · June 6, 2018, 10:36am

Have you tried to install a "math" library in your code ?
This might help to make the function "sqrt" work.

Jobin7 · June 6, 2018, 12:36pm

I tried what you said but there was still the error message
and I read the math.h file there was no mentioning of sqrt

THANKS FOR YOUR ADVICE BUT STILL HAVE AN ERROR MESSAGE.

pylon · June 6, 2018, 5:23pm

My library manager doesn't offer an "MPU6050" library for installation, the only match I have is for MPU6050_tockn but that doesn't include a Wire.h file. It seems that you produced a mess in your library folder.

system · May 6, 2021, 11:11am