ESP32 Forum

Posted: **Mon Mar 16, 2026 1:18 pm**

I updated the onboard library in my Arduino IDE 2 to version 3.3.7 from here: https://github.com/espressif/arduino-esp32

When I upload my sketch to the ESP32, the ESP always crashes. I can only use version 3.0.7 at most. Starting with version 3.1.0, the ESP32 crashes when I run my sketch. In the serial monitor, I see the following message:

Code: Select all

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

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:4640
load:0x40078000,len:15620
ho 0 tail 12 room 4
load:0x40080400,len:3164
entry 0x4008059c

Initialization complete.

assert failed: prvInitialiseNewTask tasks.c:1111 (uxPriority < ( 25 ))

Backtrace: 0x4008b97c:0x3ffb2020 0x4008b941:0x3ffb2040 0x40091d85:0x3ffb2060 0x4008d7cb:0x3ffb21a0 0x4008f02d: 0x3ffb21d0 0x400d9c76:0x3ffb2210 0x400ede8e:0x3ffb2270 0x4008c791:0x3ffb2290

ELF file SHA256: 42799b45d

Posted: **Mon Mar 16, 2026 1:23 pm**

Code: Select all

assert failed: prvInitialiseNewTask ... (uxPriority < ( 25 ))

Something's trying to create a new task with a priority higher than the maximum supported (24).

Posted: **Mon Mar 16, 2026 1:28 pm**

OK, but it works perfectly with version 3.0.7

I will change this:
xTaskCreate(SerialScan, "Serial Scan", 3000, NULL, 30, &SerialScanTask);
xTaskCreate(ValueRefresh, "Value Refresh", 4500, NULL, 200, &TaskValueRefresh);

to this:
xTaskCreate(SerialScan, "Serial Scan", 3000, NULL, 2, &SerialScanTask);
xTaskCreate(ValueRefresh, "Value Refresh", 4500, NULL, 24, &TaskValueRefresh);

Update:
It works! Thanks!!

Posted: **Mon Mar 16, 2026 2:31 pm**

Apparently, in previous versions of FreeRTOS, the task priority was implicitly capped to the maximum allowed value. Now, in addition there's also an assertion in place.

Posted: **Mon Mar 16, 2026 3:05 pm**

Thanks for the explanation

ESP32 Forum

ESP crashes after uploading sketch with ESP board library higher then 3.0.7

ESP crashes after uploading sketch with ESP board library higher then 3.0.7

Re: ESP crashes after uploading sketch with ESP board library higher then 3.0.7

Re: ESP crashes after uploading sketch with ESP board library higher then 3.0.7

Re: ESP crashes after uploading sketch with ESP board library higher then 3.0.7

Re: ESP crashes after uploading sketch with ESP board library higher then 3.0.7