Mpu6050_servo

Projects Programming
1

Hello, i have a sketch below that is supposed to tilt the mpu6050 forward and backward and this will move a servo according to the mpu6050.
I am getting this error message

Arduino: 1.8.12 (Windows Store 1.8.33.0) (Windows 10), Board: "Arduino Nano, ATmega328P"

C:\Users\tjone\AppData\Local\Temp\ccc5GsJj.ltrans0.ltrans.o:(.rodata+0x6): undefined reference to `Print::write(unsigned char const*, unsigned int)'

c:/program files/windowsapps/arduinollc.arduinoide_1.8.33.0_x86__mdqgnx93n4wtt/hardware/tools/avr/bin/../lib/gcc/avr/7.3.0/../../../../avr/lib/avr5/crtatmega328p.o:(.init9+0x0): undefined reference to `main'

collect2.exe: error: ld returned 1 exit status

exit status 1
Error compiling for board Arduino Nano.

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

and here is the code

#include <Wire.h>

#include <MPU6050.h>

#include <Servo.h>   

Servo sg90;          

int servo_pin = 2;

MPU6050 sensor ;

int16_t ax, ay, az ;

int16_t gx, gy, gz ;

void setup ( )

{ 

sg90.attach ( servo_pin );

Wire.begin ( );

Serial.begin  (9600); 

Serial.println  ( "Initializing the sensor" ); 

sensor.initialize ( ); 

Serial.println (sensor.testConnection ( ) ? "Successfully Connected" : "Connection failed"); 

delay (1000); 

Serial.println ( "Taking Values from the sensor" );

delay (1000);

}




void loop ( ) 

{ 

sensor.getMotion6 (&ax, &ay, &az, &gx, &gy, &gz);

ax = map (ax, -17000, 17000, 0, 180) ;

Serial.println (ax);

sg90.write (ax); 
                                                                                           
delay (200);

}
2

Please always do an Auto Format (Tools > Auto Format in the Arduino IDE or Ctrl + B in the Arduino Web Editor) on your code before posting it. This will make it easier for you to spot bugs and make it easier for us to read.

Please remove unnecessary blank lines from your code before posting to the forum. One or two to separate code into logical sections is fine but large spaces for no reason or random blank lines just make for more scrolling when we're trying to read your code.

Try this:

  • File > New
  • Sketch > Verify/Compile

Do you get the same "undefined reference to `main'" error?

3

pert:
Please always do an Auto Format (Tools > Auto Format in the Arduino IDE or Ctrl + B in the Arduino Web Editor) on your code before posting it. This will make it easier for you to spot bugs and make it easier for us to read.

Please remove unnecessary blank lines from your code before posting to the forum. One or two to separate code into logical sections is fine but large spaces for no reason or random blank lines just make for more scrolling when we're trying to read your code.

Try this:

  • File > New
  • Sketch > Verify/Compile

Do you get the same "undefined reference to `main'" error?

Yes i auto-formated , made a new sketch and verified/complete and i still got the same error message.

4

pert:
Please always do an Auto Format (Tools > Auto Format in the Arduino IDE or Ctrl + B in the Arduino Web Editor) on your code before posting it. This will make it easier for you to spot bugs and make it easier for us to read.

Please remove unnecessary blank lines from your code before posting to the forum. One or two to separate code into logical sections is fine but large spaces for no reason or random blank lines just make for more scrolling when we're trying to read your code.

Try this:

  • File > New
  • Sketch > Verify/Compile

Do you get the same "undefined reference to `main'" error?

Thanks , i actually re-opened my Arduino IDE and it works

5

I'm glad to hear it's working now!