Restart if Guru Meditation Error

[jensknudsen]

Is it possible to automatically restart the ESP if it experiences a Guru Meditation Error?

Sometimes my ESP freezes and the serial monitor shows Guru Meditation Error (+some description). This of course needs debugging in itself, but it happens quite rarely and I find it hard to recreate those bugs. So for now, it would be extremely useful if the ESP restarted instead of freesing.

Any clues?

[ESP_Dazz]

In menuconfig, the config option CONFIG_ESP32_PANIC should allow you to set the panic behavior to:

• Print registers and halt

• Print registers and reboot

• Silent reboot

• Invoke GDBStub

[jensknudsen]

Thank you for your reply!

I forgot to mention that I am using Arduino to compile.. Do you know how to configure this using Arduino?

[ESP_Dazz]

It should already be configured to print and reboot on Arduino, at least according to the sdkconfig file. Could you paste the serial output of the Guru Meditation error you're seeing?

[jensknudsen]

Hi,
Yes, that seems to correct, is there any way of editing this?

Here is the output I got:

Gu Meditation Error: Core panic'ed (Interrupt wdt timeout on CPU1

The missing letters and formatting might suggest problems with power(??). However I did not get any brownout detection.

[ESP_Dazz]

If configured to print and reboot, the log output should look something like this (notice how it prints "Rebooting" at the end).

Code: Select all

Hello World
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x400d395c  PS      : 0x00060630  A0      : 0x800d0ab1  A1      : 0x3ffb4f10
A2      : 0x00000001  A3      : 0x00000001  A4      : 0x00000001  A5      : 0x00000001
A6      : 0x00060021  A7      : 0x00060023  A8      : 0x00000000  A9      : 0x3ffb4ef0
A10     : 0x0000000a  A11     : 0x8001f880  A12     : 0x06ff1ff8  A13     : 0x00000000
A14     : 0x3ffaffe0  A15     : 0x3ffb6870  SAR     : 0x00000014  EXCCAUSE: 0x0000001d
EXCVADDR: 0x00000000  LBEG    : 0x400014fd  LEND    : 0x4000150d  LCOUNT  : 0xfffffffc

ELF file SHA256: 65fb33f22df59b8c8dd3dfcc1623e455b128afd6ea5d49090eb4dcafd83d2c2a
Backtrace: 0x400d3959:0x3ffb4f10 0x400d0aae:0x3ffb4f30 0x40086fd5:0x3ffb4f50

Rebooting...

If configured to print and halt, the log output should look something like this:

Code: Select all

Hello World
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x400d395c  PS      : 0x00060630  A0      : 0x800d0ab1  A1      : 0x3ffb4f10
A2      : 0x00000001  A3      : 0x00000001  A4      : 0x00000001  A5      : 0x00000001
A6      : 0x00060021  A7      : 0x00060023  A8      : 0x00000000  A9      : 0x3ffb4ef0
A10     : 0x0000000a  A11     : 0x8001f880  A12     : 0x06ff1ff8  A13     : 0x00000000
A14     : 0x3ffaffe0  A15     : 0x3ffb6870  SAR     : 0x00000014  EXCCAUSE: 0x0000001d
EXCVADDR: 0x00000000  LBEG    : 0x400014fd  LEND    : 0x4000150d  LCOUNT  : 0xfffffffc

ELF file SHA256: cb4f0853599e287873217f5050ca938ed45b0455011a4c37633b9138593bdb1a
Backtrace: 0x400d3959:0x3ffb4f10 0x400d0aae:0x3ffb4f30 0x40086fd9:0x3ffb4f50
CPU halted.

If you see the log output print "Rebooting" and the ESP32 is not rebooting, then it could be an entirely different issue.

[jensknudsen]

Ok, I will have to do some more testing. Thanks for your reply:)

[idahowalker]

You might want to hunt down and install the "esp exception decoder arduino", it could provide some help with hunting down the issue.