Trouble with MPU6050_DMP6 example

Question

I tried to test the MPU6050 example on https://maker.pro/arduino/tutorial/how-to-interface-arduino-and-the-mpu-6050-sensor, but run into a number of compiler errors like these:

In file included from C:\Users\Thimo\AppData\Local\Temp\arduino_modified_sketch_323002\MPU6050_DMP6.ino:56:0:

D:\Users\Thimo\Documents\Arduino\libraries\MPU6050/MPU6050_6Axis_MotionApps20.h:69:26: error: conflicting declaration 'typedef uint32_t prog_uint32_t'

         typedef uint32_t prog_uint32_t;

                          ^

In file included from C:\Users\Thimo\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\cores\esp32/WString.h:29:0,

                 from C:\Users\Thimo\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\cores\esp32/Arduino.h:146,

                 from sketch\MPU6050_DMP6.ino.cpp:1:

C:\Users\Thimo\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4\cores\esp32/pgmspace.h:30:23: note: previous declaration as 'typedef long unsigned int prog_uint32_t'

 typedef unsigned long prog_uint32_t;

                       ^

exit status 1
Fout bij het compileren voor board WEMOS LOLIN32

Found a similar issue on github with a solution to remove some lines in the library file MPU6050_6Axis_MotionApps20.h, but then another error pops up:

D:\Users\Thimo\Documents\Arduino\libraries\I2Cdev\I2Cdev.cpp: In static member function 'static int8_t I2Cdev::readBytes(uint8_t, uint8_t, uint8_t, uint8_t*, uint16_t)':

D:\Users\Thimo\Documents\Arduino\libraries\I2Cdev\I2Cdev.cpp:276:62: error: 'BUFFER_LENGTH' was not declared in this scope

             for (uint8_t k = 0; k < length; k += min(length, BUFFER_LENGTH)) {

                                                              ^

D:\Users\Thimo\Documents\Arduino\libraries\I2Cdev\I2Cdev.cpp: In static member function 'static int8_t I2Cdev::readWords(uint8_t, uint8_t, uint8_t, uint16_t*, uint16_t)':

D:\Users\Thimo\Documents\Arduino\libraries\I2Cdev\I2Cdev.cpp:414:70: error: 'BUFFER_LENGTH' was not declared in this scope

             for (uint8_t k = 0; k < length * 2; k += min(length * 2, BUFFER_LENGTH)) {

                                                                      ^

exit status 1
Fout bij het compileren voor board WEMOS LOLIN32

Again, an error within a library file... What am I doing wrong? @FjodorvanSlooten, I used the libraries you provided on slack, but still the same errors appear.

Answer 1

Did you save the sketch under Documents\Arduino...? As I see references to C:\Users\xxxxxxxx\AppData\Local\Temp\arduino_modified_sketch_323002\MPU6050_DMP6.ino

One other thing: are you trying to compile it for board WEMOS LOLIN32? The note at the bottom "Fout bij het compileren voor board WEMOS LOLIN32" seems to suggest this... This might not work either as these sketches (and the i2cdev library also) are made for a regular Arduino Uno/Nano...