The issue is a divide by zero, caused by the ledcSetup(TON_PIN_CHANNEL, 0, 13); function call found by @a4x4kiwi (thanks for that).

I found that the outcome is different depending on the Arduino version used:

• Arduino 1.0.6 - no error, no crash
• Arduino 2.0.1 - no error, no crash
• Arduino 2.0.2 - crash
• Arduino 2.0.3 - error, no crash

E (4532) ledc: freq_hz=0 duty_resolution=13
[  4537][E][esp32-hal-ledc.c:75] ledcSetup(): ledc setup failed!

Thanks
Felix

Within the library, edit the file Speaker.cpp

Edit line 12 to read :
ledcSetup(TONE_PIN_CHANNEL, 1000, 13);

I changed the 0 in the second parameter to a 1000.
This is a frequency setting. I don't know what it does.

It prevents the crash, allows a beep to be played, but the beep duration is wrong.

Sorry that I do not have a fix yet, I need to investigate more and I would be happy if someone has an idea how to solve that issue.

best regards
Peter

E (53174) ledc: freq_hz=0 duty_resolution=13
Guru Meditation Error: Core 1 panic'ed (IntegerDivideByZero). Exception was unhandled.

Core 1 register dump:
PC : 0x4000d099 PS : 0x00060730 A0 : 0x800e89f2 A1 : 0x3ffb26c0
A2 : 0x0f424000 A3 : 0x00000000 A4 : 0x00000000 A5 : 0x00000000
A6 : 0x00060720 A7 : 0x00000001 A8 : 0x00000001 A9 : 0x00000000
A10 : 0x00000000 A11 : 0x0f424000 A12 : 0x00060720 A13 : 0x3ffb26c0
A14 : 0x007be1a8 A15 : 0x003fffff SAR : 0x00000001 EXCCAUSE: 0x00000006
EXCVADDR: 0x00000000 LBEG : 0x40087571 LEND : 0x40087581 LCOUNT : 0xffffffff

Backtrace:0x4000d096:0x3ffb26c00x400e89ef:0x3ffb26e0 0x400e4119:0x3ffb2720 0x400e0d9e:0x3ffb2760 0x400e0dc5:0x3ffb2780 0x400d5c5d:0x3ffb27a0 0x400dd723:0x3ffb2800 0x400e614d:0x3ffb2820

It does not occur when the board definition is returned to Ver2.0.1.
I am confident that there is a problem with the board definition Ver2.0.2.

The same happens to me.
I have re-installed Arduino IDE and M5Stack libraries, but no change.

M5Stack staff please help!

Thanks
Ingo

thank you for the information - that all sound correct. And since you have a sketch running, albeit w/o using the speaker; I am out of ideas at this point in time. Sorry.

Thanks
Felix

I believe it's the M5Stack Core. The sticker on the top reads 2AN3WM5Stack-CORE. It was purchased from here:
https://www.tinytronics.nl/shop/en/platforms-and-systems/m5stack/m5core/m5core/m5stack-esp32-basic-development-kit

My current sketch connects to my wifi, gets time via NTP and shows a little game of Pong on the screen. All of this works fine on the device.

The board selected in Arduino IDE is M5Stack-Core-ESP32

thank you for sharing. That is strange. I cannot provoke that 'divide by 0' error in my setup.

Exactly which M5Stack device are you using? M5Stack (Base, Gray, Fire) or M5Core2?

In Arduino IDE which board have you chosen under Tools - Board?

Can you compile and run a basic sketch like Hello World?

Thanks
Felix

Thanks for the response. This is the crash log:

M5Stack initializing...OK
E (14534) ledc: freq_hz=0 duty_resolution=13
Guru Meditation Error: Core  1 panic'ed (IntegerDivideByZero). Exception was unhandled.

Core  1 register dump:
PC      : 0x4000d099  PS      : 0x00060830  A0      : 0x800ddc9e  A1      : 0x3ffb2720  
A2      : 0x0f424000  A3      : 0x00000000  A4      : 0x00000000  A5      : 0x00000000  
A6      : 0x00060820  A7      : 0x00000001  A8      : 0x00000001  A9      : 0x00000000  
A10     : 0x00000000  A11     : 0x0f424000  A12     : 0x00060820  A13     : 0x3ffb2720  
A14     : 0x007bdc94  A15     : 0x003fffff  SAR     : 0x00000001  EXCCAUSE: 0x00000006  
EXCVADDR: 0x00000000  LBEG    : 0x4008b5a5  LEND    : 0x4008b5b5  LCOUNT  : 0xfffffffe  


Backtrace:0x4000d096:0x3ffb27200x400ddc9b:0x3ffb2740 0x400d90b1:0x3ffb2780 0x400d572e:0x3ffb27c0 0x400d5755:0x3ffb27e0 0x400d29b9:0x3ffb2800 0x400dab9a:0x3ffb2820 




ELF file SHA256: 0000000000000000

Rebooting...
ets Jul 29 2019 12:21:46

rst:0xc (SW_CPU_RESET),boot:0x17 (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:1324
ho 0 tail 12 room 4
load:0x40078000,len:13508
load:0x40080400,len:3604
entry 0x400805f0

When calling M5.Speaker.begin() I also get the IntegerDivideByZero.
I actually did not know there was a crash log like this, so thanks for that!

Burning the UIFlow firmware and using the speaker via https://flow.m5stack.com/ does work, so it must be something I am doing wrong. I am relieved that the device itself is not broken.

I've just tested the Speaker sketch on my M5Stack Fire myself and the tones work just fine - no crash.

Posting the crash log might be helpful to figure out what going on.

Also as a test, could you try to install UIFlow firmware and check if the speaker works then?

Thanks
Felix