jefmenegazzo/mpu-i2c-drivers-python

no values for magnometer,

pdrewes opened this issue · 7 comments

pdrewes commented

only x68 shows up,
acceleration / velocity work fine running master-slave-mode.py
raspberry pi 3b, latest OS (Jan 2021) just loaded ran the install scripts as desired from the instructions.

running master-only-mode.py
gets
File "/usr/local/lib/python3.7/dist-packages/mpu9250_jmdev/mpu_9250.py", line 1012, in writeAK
self.bus.write_byte_data(self.address_ak, register, value)
File "/usr/local/lib/python3.7/dist-packages/smbus2/smbus2.py", line 434, in write_byte_data
ioctl(self.fd, I2C_SMBUS, msg)
OSError: [Errno 121] Remote I/O error
thread sampling - run.py gets the same I/O error.
VCC 5v, GND, , SCL / SDA connected

jefmenegazzo commented

@pdrewes

Please provide more information about your environment:

  • Which platform? Raspberry Pi?
  • Which MPU model? 9250?
  • How are you using it? Just an MPU? Two, a slave and a master?
  • Provide your source code.

If you are using something simple like just an MPU in RPi, use the master-only-mode.py' file in the examples folder.

pdrewes commented
jefmenegazzo commented

  • The OSError: [Errno 121] Remote I/O error means that the OS's I2C bus could not find the address of your magnetometer (AK8963). So it's a hardware problem, not this library.

  • Run sudo i2cdetect -y 1, your magnetometer should appear at address 0x0C.

  • If you are not using the MPU as a master slave, then use only master-only-mode.py as described in the documentation.

  • I recommend running:

import sys
sys.path.append("")

import time
from mpu9250_jmdev.registers import *
from mpu9250_jmdev.mpu_9250 import MPU9250

mpu = MPU9250(
    address_ak=AK8963_ADDRESS, 
    address_mpu_master=MPU9050_ADDRESS_68, # In 0x68 Address
    address_mpu_slave=None, 
    bus=1, 
    gfs=GFS_1000, 
    afs=AFS_8G, 
    mfs=AK8963_BIT_16, 
    mode=AK8963_MODE_C100HZ)

mpu.reset()

Afterwards, restart your RPi and re-run sudo i2cdetect -y 1 to see if the address 0x0C appears.

pdrewes commented
JGonzalga commented

Hello, I am struggling with the same problem, I only see the 0x68 device when running sudo i2cdetect -y 1 and then the master-only-mode.py script shows the same error: OSError: [Errno 121] Remote I/O error

were you able to solve it?

Thanks,
Josué

pdrewes commented
JGonzalga commented

I was not able to solve it with these libraries. I had to use other ones to get all the data. It would not recognize the magno portion of the sensor no matter what I did.
…
On Jun 21, 2021, at 8:34 AM, JGonzalga @.***> wrote:  Hello, I am struggling with the same problem, I only see the 0x68 device when running sudo i2cdetect -y 1 and then the master-only-mode.py script shows the same error: OSError: [Errno 121] Remote I/O error were you able to solve it? Thanks, Josué — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub, or unsubscribe.

Can you share which libraries did work for you?