Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception).

[hixvon]

Hi,

I try to start Collect_Images_for_EdgeImpulse example on ESP32cam board (with ESP32-S), but I get the same error during camera init.
EloquentEsp32cam library v. 2.7.15

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff0030,len:4980 load:0x40078000,len:16612 load:0x40080400,len:3480 entry 0x400805b4 ___IMAGE COLLECTION SERVER___ Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception). Debug exception reason: Stack canary watchpoint triggered (cam_task) Core 0 register dump: PC : 0x4008e26a PS : 0x00060a36 A0 : 0x80092394 A1 : 0x3ffb2550 A2 : 0x3ffb0300 A3 : 0xffffffff A4 : 0xb33fffff A5 : 0x3f418a28 A6 : 0x00000000 A7 : 0x00000001 A8 : 0x00060a23 A9 : 0x3ffb2550 A10 : 0x00000003 A11 : 0x00060a23 A12 : 0x00060a23 A13 : 0x0000001f A14 : 0x3ffb2ab0 A15 : 0xff000000 SAR : 0x00000004 EXCCAUSE: 0x00000001 EXCVADDR: 0x00000000 LBEG : 0x4008ab05 LEND : 0x4008ab15 LCOUNT : 0xfffffffe ...

Increasing stack size doesn't help.
ESP32 CameraWebServer example works fine, so board and camera are ok.
Thank you for help.

Regards,
Sergey

[salernosimone]

Did you enabled PSRAM? Are you able to run other sketches from the library?

[hixvon]

Hi,

Yes, PSRAM is enabled:
Total heap: 312772
Free heap: 269128
Total PSRAM: 4194304
Free PSRAM: 4192124

And yes, I have tried some examples, the same result.

[salernosimone]

Did you selected aithinker() model in the sketch? Share the sketch and IDE tools menu

[hixvon]

Thank you for your help.

I just set Wifi and aithinker pinout.
Please see attached files.

MJPEG_Stream.txt

[hixvon]

Looks like something is unstable with my board.
After power on it resets in a loop. I just left it on the table and after some cycles it started up fine and started streaming data.
Tried 5 different USB cables, no effect. Can it be power supply?

Rebooting...
ets Jun 8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4980
load:0x40078000,len:16612
load:0x40080400,len:3480
entry 0x400805b4
MJPEG STREAM SERVER
Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception).
Debug exception reason: Stack canary watchpoint triggered (cam_task)
Core 0 register dump:
PC : 0x4008e26a PS : 0x00060f36 A0 : 0x80092394 A1 : 0x3ffb2550
A2 : 0x3ffb0300 A3 : 0xffffffff A4 : 0xb33fffff A5 : 0x3f4166e4
A6 : 0x00000000 A7 : 0x00000001 A8 : 0x00060f23 A9 : 0x3ffb2550
A10 : 0x00000003 A11 : 0x00060f23 A12 : 0x00060f23 A13 : 0x0000001f
A14 : 0x3ffb2ab0 A15 : 0xff000000 SAR : 0x00000004 EXCCAUSE: 0x00000001
EXCVADDR: 0x00000000 LBEG : 0x4008ab05 LEND : 0x4008ab15 LCOUNT : 0xfffffffe

Backtrace: 0x4008e267:0x3ffb2550 0x40092391:0x3ffb2580 0x400923c6:0x3ffb25a0 0x4009253c:0x3ffb25c0 0x400830bf:0x3ffb25e0 0x400830d9:0x3ffb2610 0x40082d55:0x3ffb2630 0x4008e754:0x3ffb2650 0x4008d805:0x3ffb2670 0x4008da7c:0x3ffb2690 0x4008373e:0x3ffb26b0 0x40083786:0x3ffb26d0 0x400838e9:0x3ffb2700 0x400e72cd:0x3ffb2720 0x400eb899:0x3ffb2750 0x4000bd83:0x3ffb2770 0x4000182a:0x3ffb2790 0x400eaf41:0x3ffb27b0 0x400eb899:0x3ffb27d0 0x4008a76e:0x3ffb27f0 0x40089bed:0x3ffb2810 0x40089c3e:0x3ffb2830 0x4008a13d:0x3ffb2850 0x4017b803:0x3ffb2880 0x4017b21a:0x3ffb28a0 0x40171f41:0x3ffb2bc0 0x40093611:0x3ffb2bf0 0x4011b1f9:0x3ffb2c50 0x4008e165:0x3ffb2ca0

ELF file SHA256: cc1ad1afd

Rebooting...
ets Jun 8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff0030,len:4980
load:0x40078000,len:16612
load:0x40080400,len:3480
entry 0x400805b4
MJPEG STREAM SERVER
Camera OK
WiFi OK
MjpegStream OK
MJPEG stream is available at http://192.168.0.85:81

[salernosimone]

Power supply is important, yes.Another thing to try is select ESP32 Dev Module as board from the Tools menu, not Aithinker Il 2 set 2025 10:35, hixvon ***@***.***> ha scritto:hixvon left a comment (eloquentarduino/EloquentEsp32cam#63) Looks like something is unstable with my board. After power on it resets in a loop. I just left it on the table and after some cycles it started up fine and started streaming data. Tried 5 different USB cables, no effect. Can it be power supply? Rebooting... ets Jun 8 2016 00:22:57 rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff0030,len:4980 load:0x40078000,len:16612 load:0x40080400,len:3480 entry 0x400805b4 MJPEG STREAM SERVER Guru Meditation Error: Core 0 panic'ed (Unhandled debug exception). Debug exception reason: Stack canary watchpoint triggered (cam_task) Core 0 register dump: PC : 0x4008e26a PS : 0x00060f36 A0 : 0x80092394 A1 : 0x3ffb2550 A2 : 0x3ffb0300 A3 : 0xffffffff A4 : 0xb33fffff A5 : 0x3f4166e4 A6 : 0x00000000 A7 : 0x00000001 A8 : 0x00060f23 A9 : 0x3ffb2550 A10 : 0x00000003 A11 : 0x00060f23 A12 : 0x00060f23 A13 : 0x0000001f A14 : 0x3ffb2ab0 A15 : 0xff000000 SAR : 0x00000004 EXCCAUSE: 0x00000001 EXCVADDR: 0x00000000 LBEG : 0x4008ab05 LEND : 0x4008ab15 LCOUNT : 0xfffffffe Backtrace: 0x4008e267:0x3ffb2550 0x40092391:0x3ffb2580 0x400923c6:0x3ffb25a0 0x4009253c:0x3ffb25c0 0x400830bf:0x3ffb25e0 0x400830d9:0x3ffb2610 0x40082d55:0x3ffb2630 0x4008e754:0x3ffb2650 0x4008d805:0x3ffb2670 0x4008da7c:0x3ffb2690 0x4008373e:0x3ffb26b0 0x40083786:0x3ffb26d0 0x400838e9:0x3ffb2700 0x400e72cd:0x3ffb2720 0x400eb899:0x3ffb2750 0x4000bd83:0x3ffb2770 0x4000182a:0x3ffb2790 0x400eaf41:0x3ffb27b0 0x400eb899:0x3ffb27d0 0x4008a76e:0x3ffb27f0 0x40089bed:0x3ffb2810 0x40089c3e:0x3ffb2830 0x4008a13d:0x3ffb2850 0x4017b803:0x3ffb2880 0x4017b21a:0x3ffb28a0 0x40171f41:0x3ffb2bc0 0x40093611:0x3ffb2bf0 0x4011b1f9:0x3ffb2c50 0x4008e165:0x3ffb2ca0 ELF file SHA256: cc1ad1afd Rebooting... ets Jun 8 2016 00:22:57 rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT) configsip: 0, SPIWP:0xee clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00 mode:DIO, clock div:1 load:0x3fff0030,len:4980 load:0x40078000,len:16612 load:0x40080400,len:3480 entry 0x400805b4 MJPEG STREAM SERVER Camera OK WiFi OK MjpegStream OK MJPEG stream is available at http://192.168.0.85:81 —Reply to this email directly, view it on GitHub, or unsubscribe.You are receiving this because you commented.Message ID: ***@***.***>

[hixvon]

Any other board in configuration shows next error:
(4888) gpio: gpio_install_isr_service(526): GPIO isr service already installed
E (4996) cam_hal: cam_dma_config(363): frame buffer malloc failed
E (4997) cam_hal: cam_config(453): cam_dma_config failed
E (4997) camera: Camera config failed with error 0xffffffff
Cannot init camera

psramInit() function returns with error.

[hixvon]

Found dirty workaround. After power up or after reset released!!!, pressing "boot/download" button initializes device normally. Streaming doesn't work very stable, but works.
Have ordered another device, in case of my has issues, but not sure, because of CameraWebServer works without any issue.
Will try external power and serial port.

[salernosimone]

You can also try my newer library, it has a MjpegServer to also capture frames easily: https://github.com/salernosimone/arduino-espx/blob/main/examples/camx/MjpegServer/MjpegServer.ino

Search for "espx" in the Library Manager