Guru Meditation Error: Core 1 panic’ed - TTS-20 Pro Diode Laser

what does it mean if you get a very similar error code as soon as you start up? As soon as I open LightBurn it’s running the error code over and over until I switch off my laser engraver.

Guru Meditation Error: Core 1 panic’ed (LoadProhibited). Exception was unhandled.
Core 1 register dump:
PC : 0x4200ac04 PS : 0x00060530 A0 : 0x00000000 A1 : 0x3fce5a80
A2 : 0x00000000 A3 : 0x3fc9b50c A4 : 0x3fc9ca50 A5 : 0x00000000
A6 : 0x00000000 A7 : 0x00000000 A8 : 0x8200abfb A9 : 0x3fce5a60
A10 : 0x0000000d A11 : 0x3fc966b0 A12 : 0x00000014 A13 : 0x00000004
A14 : 0x3fce5bf0 A15 : 0x80000001 SAR : 0x0000000a EXCCAUSE: 0x0000001c
EXCVADDR: 0x00000022 LBEG : 0x40056f08 LEND : 0x40056f12 LCOUNT : 0x00000000
Backtrace:0x4200ac01:0x3fce5a80
ELF file SHA256: 0000000000000000
Rebooting…

Build:Mar 27 2021
rst:0xc (RTC_SW_CPU_RST),boot:0x28 (SPI_FAST_FLASH_BOOT)
Saved PC:0x420a5092
SPIWP:0xee
mode:DIO, clock div:1
load:0x3fcd0108,len:0x43c
load:0x403b6000,len:0xbd0
load:0x403ba000,len:0x29c8
SHA-256 comparison failed:
Calculated: 0bb45b01207a4a9e9fca8880ddfc0f79112bfa4d004bd1e6b2eaa75c5323b19d
Expected: 6eb14ec480aff4f05e39378c41406102ac163573741e63b6cfd73509ef44e3bd
Attempting to boot anyway…
entry 0x403b61d8

That’s a boot loop. You need to flash the firmware again.

I dont know how.

i uninstalled everything yesterday, Reinstalled and updated everything. Not sure how to flash firmware.

See this guide: Firmware Update & Settings - Diode Laser Wiki

Thank you, I thought I had tried this; however, I will go through it more thoroughly when I get off work and get home. I appreciate your help! If I have any more questions, I hope its ok to reach back out to you.

Just want to make sure that these updates and values will work for my machine. Everyone seems to be running a different machine than me. I am not that computer savvy, just enough to do some things right and mess up other things. I bought a TTS-20 Pro 20W Diode Laser from TwoTrees. I am not sure what the S10 refers to. Just a few things I think have learned while doing all this research…
I don’t believe my machine has an ESP32 (maybe it does, I just haven’t figured it out yet). My USB port is CH340 driver and up to date. It ran fine up until about a week ago, now it just repeats the code. I read that if I install the wrong firmware, it can ruin the machine permanently. Thats why I just want to make sure that these updates and values will work for my machine.

It has an ESP32 most likely. The error message shows this, and nearly all current lasers feature this one. There is not much choice.

The Guru Meditation Error is an error message from one of the Dual cores of an ESP32 chip.

You’re experiencing something different than the original poster. I’m going to split the thread to reduce potential confusion here.

The Firmware for your TTS-20 Pro is here.

I believe this is an Auto-flash type where you load the firmware on the TF card and when the Laser engraver is powered up it loads the file off the inserted card into the ESP32.

You may need to remove the card from the laser engraver to start the engraver afterward.

Ok, thank you. I have downloaded these files, but apparently to the wrong area. I will follow this and try again. thanks for the extra explanation. Sorry I’m not very computer savvy.

It’s all good. We all start this journey somewhere.
I’ve learned a lot here.

TwoTrees sent me an updated firmware file (not corrupt) and I was able to flash it. It works again! Thank you for all your help everyone!

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