Navio2 No INS backends available

Navio / Edge Hardware
1

Hello,

after about one month since i bought my navio2, all that time i was slowly progressing and getting to know about how to setup navio2. I managed to set telemetry transfer and video transfer as well through 3g network.
However, yesterday i finally put my navio2 onto my quadcopter and started doing a compass calibration according to your docs using onboard calibration process of mission planner. I realised that compass1 was not getting updated with green values. Then i tried to power off and on again navio and i realised that suddenly APM couldnt even be autostarted but could neither be manually started using the command sudo ArduCopter-quad -A udp:xxx.xxx.xxx.xxx:14550 as it was returning NO INS backends available. So i went to sleep

Today, I powered again my quadcopter and the APM autostarted normally as expected. But again when i tried to make the compass calibration through mission planner compass1 would still not get updated with green values but it was showing red values. THen, again when i rebooted navio i couldnt autostart again APM. So I decided to format my sdcard and install from scratch raspbian image (using the latest image 20160718) and APM according to your docs. After a fresh install again i couldnt start APM because I was getting the same message NO INS backends available

SO i decided to run the navio2 examples that you offer. THe result of running these examples is shown in the attached image. I am confused and i dont know whats going on. Why APM cannot get started and why does compass calibration never updated compass1 values??? For a whole month I never had problems starting APM and never received this message NO INS backends available . Why does it suddenly start to appear ??
THe above issues occur no matter if i supply power to navio through microusb or through the power module.

Please advise
Thank you

P60801-223438[1].jpg4192×3104 1.84 MB

2

Hello,

It looks like there is no electrical contact between Raspberry PI and Navio2, please check that board is screwed tightly and spacer connector is firmly connected.

3

Dear Igor,

i really doubt that there is no electrical contact between rpi2 and navio2 because my boards are inside the 3d-printed navio2 case and the case is screwed normally and tight. However I will check again later although i dont think there is something wrong.

are there any other suspisions about what might be wrong ?

thank you

4

What this error says is that ArduPilot (and example) is not able to establish connection to MPU9250 sensor. Possible reasons could be: bad connection between boards, dead sensor, dead SPI bus on RPi. Try to run other examples, do they work?

5

ok.

i will let you know later

6

So, finally it seems that the problem was bad connection between boards as you said… Quite strange as my boards were screwed normally between a 3d printed navio case… SO when i applied even a very very small pressure in any direction on the case, the compass would be recognized .

I suspect that my navio case is slightly distorted that causes tha boards to be stressed a little bit causing this interminnent contact problems… I have now removed the case and everything is OK

THank you