Guru Meditation Error & Magnetic Interference (EMI/RFI)

[robert-hh]

@combaindeft YES! That could be the proof for earth rays, long sought by esotarian people!

[combaindeft]

@robert-hh said in Guru Meditation Error & Magnetic Interference (EMI/RFI):

@combaindeft YES! That could be the proof for earth rays, long sought by esotarian people!

HaHa 😇

But NOT! ... more like they didn't put good shielding around the things they put underground .... and yes ... it only follows the road(s) that are paved / have put something along underground ...

and, @robert-hh ... having looked more into the Error code in the Core-Dump ... it's looks like there are places in the Firmware code one needs to add Try-Catch(es) ...

Since, say after 12-20 reboots & core dumps ... it does actually run the code once to the end (last line) and then reboots 12-20 times ... and runs once again ... so forth and so on ...

[Martinnn]

@combaindeft Very interesting. In my case, the proposed correlation between USB cable and gurus did not hold. It more seems that some devices crash more regularly than others.
Maybe you should make yourself a pair of divining rods. This can be a very enlightening experience, particularly for a science-believing engineer (not joking)!
Do you have a spectrum analyzer? I'd suggest using it together with some near field probes (E and H field) when driving around.

[crumble]

@robert-hh said in Guru Meditation Error & Magnetic Interference (EMI/RFI):

@combaindeft YES! That could be the proof for earth rays, long sought by esotarian people!

Or a good place to dig for gold. @combaindeft you can easily test if it an expensive metal. Switch the GPS antennawit a plug and an active antenna. Shield the device and tell us the result. It will be only copper when it works, so you share the result ;)

[Paul Thornton]

@combaindeft I should be at my local hackspace this weekend at somepoint. Ill give your test script a run then. That place has enough RF/EMF noise that all laptop trackpads die when entering the building and refuse to work untill we leave (You try debugging that one in the room full of random hardware...)

That said. I've run a ton of Pycom boards there in the past without major issue.

[combaindeft]

@paul-thornton

Any results? :-)

@crumble, @Martinnn, @Paul-Thornton:

So we ran both PySense+FiPY & PyTrack+FiPy devices side by side (in the car, on the dashboard), no usb, both running same "boot_debug_Lights.py" script.

Our findings:

• Both had issues :-(
• The PySense seamed to bit a bit less vunerable and ran a little better ... but it it failed.

[Paul Thornton]

@combaindeft said in Guru Meditation Error & Magnetic Interference (EMI/RFI):

@paul-thornton

Any results? :-)

@crumble, @Martinnn, @Paul-Thornton:

So we ran both PySense+FiPY & PyTrack+FiPy devices side by side (in the car, on the dashboard), no usb, both running same "boot_debug_Lights.py" script.

Our findings:

• Both had issues :-(
• The PySense seamed to bit a bit less vunerable and ran a little better ... but it it failed.

Sadly no results (they worked fine). Will mention this issue again in tomorrows standup.

[combaindeft]

@paul-thornton

Here is a video you can show them:
Direkt download Link
InDirekt Link

Would it be possible for you to send us one of your devices that worked in your "test area"? ... so we can field test them in our "Area"? (and we'll send it back ASAP...)

So we can exclude if it's something between different HW Devices or not.

[johand]

@combaindeft
Have you found a soultion for this issue? I have the same problem (also in Sweden) with a W01 on a custom board. Have found a couple of places where this happens everytime passing with a car. This is on the country side, there could be smaller power lines under ground (power lines feeding a few houses, nothing big).

[johand]

Seems like this is related to WIFI in some way. When turning off WIFI (pycom.wifi_on_boot(False)) problem goes away. I am not using WIFI in any way, but maybe powerlines or WIFI accesspoint makes my W01 panic?

This is the application I have been running during the test:

from machine import Pin
import utime

LED.append(Pin('P3', mode=Pin.OUT))

while True:
    LED.value(1)
    utime.sleep_ms(100)
    LED.value(0)
    utime.sleep_ms(100)

I havent been able to decode the core dumps, can I send them to someone for investigation? This forum didn´t allow me to post it here.