AHRS - What does "Error identifying IMU: remote I/O error" - mean?

[davidkjackson54]

1. Stratux version:V1.6r1-eu028-us

2. Stratux config:

   SDR

   • single
   • dual

   GPS

   • yes
   • no
     type:

   AHRS

   • yes
   • no

   power source: direct power supply whilst testing

   usb cable:

3. EFB app and version: (e.g., WingX Pro7 8.6.2) not applicable

   EFB platform: (e.g., iOS 9.2) not applicable

   EFB hardware: (e.g., iPad Mini 2) not applicable

4. Description of your issue:

I have installed a GY-91 and set the pins to the Raspberry PI 3B correctly.
I open up 192.168.1.10 and try to set AHRS orientation but get the error "Orientation failed'
The log shows:
Error identifying IMU: remote I.O error

but I can find nothing to indicate what this actually means and if there is a solution.
Is there any documentation that might help on this error message?

[securedirective]

Did you ever find a solution? I'm getting this now too. It was working fine a few months ago, and I changed nothing at all. I'm wondering if it's actually a hardware failure, perhaps of the MPU9250 chip.

[brightproject]

Hello @cyoung and @jpoirier
A little off-topic, but could you please tell me, Stratux uses data from MEMS sensors that are already prepared, i.e. is sensor fusion done inside the sensor or does the fusion happen in stratux code?
For example here

stratux/main/sensors.go

Line 168 in eec0b15

func sensorAttitudeSender() {

As far as I understand, Stratux works with two types of sensors ICM20948 and MPU9250, and they seem to contain DMP - digital motion processor.
I want to use lsm6ds3 or l3gd20 MEMS sensors.
They unfortunately don't do sensor fusion, and so I'm wondering if there is some kind of magic in the stratux code?
P.S. I program in C++, I understand a little Python, but I don’t quite understand the Go language.