grove_imu_9dof_icm20600_ak09918 module seems to not work

[baterja]

I'm a pretty new user of Grove modules. I have successfully run 16x2 LCD and ultrasonic ranger with that Python library but I can't run IMU9DOFICM20600 (gyro/accelerometer/compass) with it.

What I try:

from grove.grove_imu_9dof_icm20600_ak09918 import GroveIMU9DOFICM20600

imu = GroveIMU9DOFICM20600()

and just instantly I get an error message being logged: Failed to open i2c bus /, error = -1. It's not an exception, I can still go on and run methods like imu.get_accel() or imu.get_gyro() but they keep returning all zeros. That module have no documentation in the library so I don't have an idea if I do something wrong. Did anyone use that module and can confirm it works?

Device info: Raspberry Pi 2B Raspbian 10 "Buster" Python 3.7.3 I use Grove Base Hat for Raspberry Pi. IMU 9DOF v.2.2 is connected to the first I2C port on the hat. I have the newest version of the library installed from source. I have other devices connected to the hat (ultrasonic ranger and LCD) but tried to remove them and it didn't help. I've run i2cdetect and it seems like 68 address is detected.

pi@raspberrypi:~/work $ sudo i2cdetect -y 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- 04 -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- 3e -- 
40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: -- -- -- -- -- -- -- -- 68 -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --      

[Chunchun-tian]

The content of this page may help you https://wiki.seeedstudio.com/Grove-IMU_9DOF-lcm20600+AK09918/#fuction-table