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kriswiner / MPU9250

Arduino sketches for MPU9250 9DoF with AHRS sensor fusion
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MPU9250_BMP280_BasicAHRS_t3 for GY-91 ? #318

Open funwey opened 5 years ago

funwey commented 5 years ago

Hi Kris;

I connect two units of GY-91 (with one of the SDO connect to 3.3 V) to a mega2560 board, and use your MPU9250_BMP280_BasicAHRS_t3 code and only included the wire.h :

include "Wire.h"

//#include //#include

plus some other modification to the code so that it compiled and uploaded. The serial output was a follow: Scanning... I2C device found at address 0x68 ! I2C device found at address 0x69 ! I2C device found at address 0x76 ! I2C device found at address 0x77 ! done

MPU9250 9-axis motion sensor... MPU9250 I AM 73 I should be 71 Could not connect to MPU9250: 0x73

... I have also used the "MPU9250BasicAHRS" code on this same hardware and it also replied that '73' was found. I previously ran the same code on MPU9250 and it was OK. I have tried switching the 0x68 to 0x69 and it still gave the same problem.

Would like to know if there was previously any problem with GY-91's combined with mega 2560 with your code?

Rgds

Fun Wey

kriswiner commented 5 years ago

These are MPU9255 on your boards, they have WHO_AM_I 0x73.

" MPU9250 I AM 73 I should be 71"

change the check to 0x73 from 0x71 and the sketch should work.

On Sun, Oct 28, 2018 at 3:15 AM funwey notifications@github.com wrote:

Hi Kris;

I connect two units of GY-91 (with one of the SDO connect to 3.3 V) to a mega2560 board, and use your MPU9250_BMP280_BasicAHRS_t3 code and only included the wire.h :

include "Wire.h"

//#include //#include

plus some other modification to the code so that it compiled and uploaded. The serial output was a follow: Scanning... I2C device found at address 0x68 ! I2C device found at address 0x69 ! I2C device found at address 0x76 ! I2C device found at address 0x77 ! done

MPU9250 9-axis motion sensor... MPU9250 I AM 73 I should be 71 Could not connect to MPU9250: 0x73

... I have also used the "MPU9250BasicAHRS" code on this same hardware and it also replied that '73' was found. I previously ran the same code on MPU9250 and it was OK. I have tried switching the 0x68 to 0x69 and it still gave the same problem.

Would like to know if there was previously any problem with GY-91's combined with mega 2560 with your code?

Rgds

Fun Wey

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mjs513 commented 5 years ago

I've run into that a few times and after changing to 0x73 I can confirm it does work no problem.

funwey commented 5 years ago

Thanks Kris. Yes I have tried the code it works. Will buy you beer sometime.