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Topic: Arduino DUE and MPU 9250 Connection failed (Read 856 times) previous topic - next topic


I have connected my Arduino DUE up to the Seeed Studio Grove 10DOF V2 board which has the MPU9250 and the sensor board is 5v/3V3 compatible.


When I run the following test script


I get that the MPU9250 connection failed.

So far..

1) I have tried the other possible I2C address (0x69)
2) I have also run an I2C scanner and there is a device at address 0x68 as expected.
3) I can make a successful connection when I swap out the Arduino DUE for the Arduino MEGA
4) Another Grove sensor works with the Arduino DUE

Since the magnetometer on the 10DOF is connecting successfully I am confused why the DUE wont connect with the MPU9250.

Any ideas on how to solve this issue would be greatly appreciated!


If you have already I2C pull-ups on the beakout board, you can't use SDA/SCL on the DUE side since they have 1K pull-ups. However, SDA1/SCL1 (Wire1) don't have pull-ups and can be used by adding this line at the beginning ogf your sketch:

#include <Wire.h>
#define Wire Wire1


Thanks! I tried that but it made no difference, the MPU 9250 is still failing to connect. I dont understand why the BMP280 magnetometer is working but not the MPU9250 as they are on the same IMU board

I am getting numbers being output on serial even though the connection has failed which seems weird.


Your issue may be, the MEGA is a 5 volt device, the Due is a 3.3 volt device. The MPU9250 is a 3.3 volt device but inputs 5 volts to an on board 3.3 volt regulator. Well the one I got does. I soldered the bypass jumper on my MPU9250 board so I can input 3.3V directly.
1/18/2018, got my first Arduino Uno.

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