Login

vdeconinck · 04-12-2026, 10:57 PM

Hi,

I bought a KC868-16A about one year ago and did some tests but I never used it because I didn't have time.
Now I want to finish my project, but the board has stopped responding completely.

I connected it via USB to get the logs:

Code:
ELF file SHA256: d62704405

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:2

load:0x3fff0030,len:7112

load:0x40078000,len:15624

load:0x40080400,len:4

load:0x40080404,len:3876

entry 0x4008064c

[0;32mI (29) boot: ESP-IDF 5.1.5 2nd stage bootloader[0m

[0;32mI (29) boot: compile time Jan 18 2025 19:20:33[0m

[0;32mI (29) boot: Multicore bootloader[0m

[0;32mI (33) boot: chip revision: v3.1[0m

[0;32mI (37) boot.esp32: SPI Speed      : 40MHz[0m

[0;32mI (42) boot.esp32: SPI Mode       : DIO[0m

[0;32mI (46) boot.esp32: SPI Flash Size : 4MB[0m

[0;32mI (51) boot: Enabling RNG early entropy source...[0m

[0;32mI (56) boot: Partition Table:[0m

[0;32mI (60) boot: ## Label            Usage          Type ST Offset   Length[0m

[0;32mI (67) boot:  0 otadata          OTA data         01 00 00009000 00002000[0m

[0;32mI (75) boot:  1 phy_init         RF data          01 01 0000b000 00001000[0m

[0;32mI (82) boot:  2 app0             OTA app          00 10 00010000 001c0000[0m

[0;32mI (90) boot:  3 app1             OTA app          00 11 001d0000 001c0000[0m

[0;32mI (97) boot:  4 nvs              WiFi data        01 02 00390000 0006d000[0m

[0;32mI (105) boot: End of partition table[0m

[0;32mI (109) esp_image: segment 0: paddr=001d0020 vaddr=3f400020 size=1d6ech (120556) map[0m

[0;32mI (161) esp_image: segment 1: paddr=001ed714 vaddr=3ffb0000 size=025e4h (  9700) load[0m

[0;32mI (165) esp_image: segment 2: paddr=001efd00 vaddr=40080000 size=00318h (   792) load[0m

[0;32mI (167) esp_image: segment 3: paddr=001f0020 vaddr=400d0020 size=4c58ch (312716) map[0m

[0;32mI (288) esp_image: segment 4: paddr=0023c5b4 vaddr=40080318 size=09bfch ( 39932) load[0m

[0;32mI (305) esp_image: segment 5: paddr=002461b8 vaddr=50000000 size=00020h (    32) load[0m

[0;32mI (310) boot: Loaded app from partition at offset 0x1d0000[0m

[0;32mI (311) boot: Disabling RNG early entropy source...[0m

[0;32m[I][logger:120]: Log initialized[0m

[0;35m[C][safe_mode:136]: Unsuccessful boot attempts: 10[0m

[1;31m[E][safe_mode:148]: Boot loop detected[0m

[1;31m[E][component:420]: safe_mode set Error flag: unspecified[0m

[0;32m[I][app:089]: Running through setup()[0m

E (11278) task_wdt: Task watchdog got triggered. The following tasks/users did not reset the watchdog in time:

E (11278) task_wdt:  - loopTask (CPU 1)

E (11278) task_wdt: Tasks currently running:

E (11278) task_wdt: CPU 0: IDLE0

E (11278) task_wdt: CPU 1: loopTask

E (11278) task_wdt: Aborting.

E (11278) task_wdt: Print CPU 1 backtrace

Backtrace: 0x4000c04d:0x3ffbb670 0x40083db2:0x3ffbb690 0x400f5916:0x3ffbb6b0 0x400e875c:0x3ffbb6f0 0x400d81eb:0x3ffbb730 0x40114fed:0x3ffbb7d0 0x400db5df:0x3ffbb7f0 0x400db02b:0x3ffbb810 0x400d9ce1:0x3ffbb840 0x400dd5e2:0x3ffbb870 0x400d678f:0x3ffbb910

ELF file SHA256: d62704405

Rebooting...

[...]

E (11278) task_wdt: Task watchdog got triggered. The following tasks/users did not reset the watchdog in time:

E (11278) task_wdt:  - loopTask (CPU 1)

E (11278) task_wdt: Tasks currently running:

E (11278) task_wdt: CPU 0: IDLE0

E (11278) task_wdt: CPU 1: loopTask

E (11278) task_wdt: Aborting.

E (11278) task_wdt: Print CPU 1 backtrace

Backtrace: 0x4000bfed:0x3ffbb640 0x40085b1f:0x3ffbb650 0x40083a46:0x3ffbb670 0x40083da6:0x3ffbb690 0x400f5916:0x3ffbb6b0 0x400e875c:0x3ffbb6f0 0x400d81eb:0x3ffbb730 0x40114fed:0x3ffbb7d0 0x400db5df:0x3ffbb7f0 0x400db02b:0x3ffbb810 0x400d9ce1:0x3ffbb840 0x400dd5e2:0x3ffbb870 0x400d678f:0x3ffbb910

etc.

I disconnected everything (only left power and USB-C) and it still crashes.

I flashed it with the Kincony firmware but no response.
The serial log via USB is now:

Code:
ets Jul 29 2019 12:21:46

rst:0x1 (POWERON_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:2

load:0x3fff0030,len:6652

ho 0 tail 12 room 4

load:0x40078000,len:15052

load:0x40080400,len:3836

entry 0x4008069c

[0;32mI (29) boot: ESP-IDF v4.4.7 2nd stage bootloader[0m

[0;32mI (29) boot: compile time 15:12:15[0m

[0;32mI (29) boot: Multicore bootloader[0m

[0;32mI (32) boot: chip revision: v3.1[0m

[0;32mI (36) boot.esp32: SPI Speed      : 40MHz[0m

[0;32mI (41) boot.esp32: SPI Mode       : DIO[0m

[0;32mI (45) boot.esp32: SPI Flash Size : 4MB[0m

[0;32mI (50) boot: Enabling RNG early entropy source...[0m

[0;32mI (55) boot: Partition Table:[0m

[0;32mI (59) boot: ## Label            Usage          Type ST Offset   Length[0m

[0;32mI (66) boot:  0 nvs              WiFi data        01 02 00009000 00026000[0m

[0;32mI (74) boot:  1 phy_init         RF data          01 01 0003f000 00001000[0m

[0;32mI (81) boot:  2 factory          factory app      00 00 00040000 003b0000[0m

[0;32mI (89) boot: End of partition table[0m

[0;32mI (93) esp_image: segment 0: paddr=00040020 vaddr=3f400020 size=102078h (1056888) map[0m

[0;32mI (484) esp_image: segment 1: paddr=001420a0 vaddr=3ffb0000 size=0339ch ( 13212) load[0m

[0;32mI (489) esp_image: segment 2: paddr=00145444 vaddr=40080000 size=0abd4h ( 43988) load[0m

[0;32mI (508) esp_image: segment 3: paddr=00150020 vaddr=400d0020 size=a7ca8h (687272) map[0m

[0;32mI (757) esp_image: segment 4: paddr=001f7cd0 vaddr=4008abd4 size=05228h ( 21032) load[0m

[0;32mI (773) boot: Loaded app from partition at offset 0x40000[0m

[0;32mI (774) boot: Disabling RNG early entropy source...[0m

[0;32mI (785) cpu_start: Multicore app[0m

[0;32mI (785) cpu_start: Pro cpu up.[0m

[0;32mI (786) cpu_start: Starting app cpu, entry point is 0x40081278[0m

[0;32mI (0) cpu_start: App cpu up.[0m

[0;32mI (805) cpu_start: Pro cpu start user code[0m

[0;32mI (806) cpu_start: cpu freq: 240000000[0m

[0;32mI (806) cpu_start: Application information:[0m

[0;32mI (810) cpu_start: Project name:     KC868_A16[0m

[0;32mI (815) cpu_start: App version:      v2.2.20[0m

[0;32mI (820) cpu_start: Compile time:     Apr  2 2026 15:12:09[0m

[0;32mI (826) cpu_start: ELF file SHA256:  b7c54ce742331a6d...[0m

[0;32mI (832) cpu_start: ESP-IDF:          v4.4.7[0m

[0;32mI (837) cpu_start: Min chip rev:     v0.0[0m

[0;32mI (842) cpu_start: Max chip rev:     v3.99 [0m

[0;32mI (847) cpu_start: Chip rev:         v3.1[0m

[0;32mI (852) heap_init: Initializing. RAM available for dynamic allocation:[0m

[0;32mI (859) heap_init: At 3FFAE6E0 len 00001920 (6 KiB): DRAM[0m

[0;32mI (865) heap_init: At 3FFC5190 len 0001AE70 (107 KiB): DRAM[0m

[0;32mI (871) heap_init: At 3FFE0440 len 00003AE0 (14 KiB): D/IRAM[0m

[0;32mI (877) heap_init: At 3FFE4350 len 0001BCB0 (111 KiB): D/IRAM[0m

[0;32mI (884) heap_init: At 4008FDFC len 00010204 (64 KiB): IRAM[0m

[0;32mI (891) spi_flash: detected chip: generic[0m

[0;32mI (895) spi_flash: flash io: dio[0m

[0;32mI (900) cpu_start: Starting scheduler on PRO CPU.[0m

[0;32mI (0) cpu_start: Starting scheduler on APP CPU.[0m

[0;32mI (914) main: [APP] Startup..[0m

[0;32mI (917) main: [APP] Free memory: 223808 bytes[0m

[0;32mI (922) main: [APP] IDF version: v4.4.7[0m

[0;32mI (985) NVS: save default system config.[0m

[0;32mI (991) NVS: save default network config.[0m

[0;32mI (997) NVS: save default tuya config.[0m

[0;32mI (1002) NVS: save default protocol config.[0m

[0;32mI (1009) NVS: save default input config.[0m

[0;32mI (1012) NVS: save default output config.[0m

[0;32mI (1017) NVS: save default name config.[0m

[0;32mI (1025) NVS: save default state.[0m

[0;32mI (1029) NVS: save default config.[0m

[0;32mI (1035) NVS: save default config.[0m

[0;32mI (1039) NVS: save default config.[0m

[0;32mI (1155) NVS: save default config.[0m

[0;32mI (1370) NVS: init nvs finish.[0m

[0;31mE (6371) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:[0m

[0;31mE (6371) task_wdt:  - IDLE0 (CPU 0)[0m

[0;31mE (6371) task_wdt: Tasks currently running:[0m

[0;31mE (6371) task_wdt: CPU 0: main[0m

[0;31mE (6371) task_wdt: CPU 1: IDLE1[0m

[0;31mE (6371) task_wdt: Print CPU 0 (current core) backtrace[0m

Backtrace: 0x400F1456:0x3FFB0B90 0x40082C75:0x3FFB0BB0 0x40008541:0x3FFC7610 0x40088625:0x3FFC7630 0x400F3C0E:0x3FFC7650 0x400D9D51:0x3FFC7680 0x400D85BA:0x3FFC7710 0x40175DF7:0x3FFC7730

[0;31mE (6371) task_wdt: Print CPU 1 backtrace[0m

Backtrace: 0x40085585:0x3FFB1190 0x40082C75:0x3FFB11B0 0x4000BFED:0x3FFC8550 0x4008CC92:0x3FFC8560 0x400F16BF:0x3FFC8580 0x400F16CB:0x3FFC85B0 0x400D4E16:0x3FFC85D0 0x4008AE18:0x3FFC85F0

[0;31mE (11371) task_wdt: Task watchdog got triggered. The following tasks did not reset the watchdog in time:[0m

[0;31mE (11371) task_wdt:  - IDLE0 (CPU 0)[0m

[0;31mE (11371) task_wdt: Tasks currently running:[0m

[0;31mE (11371) task_wdt: CPU 0: main[0m

[0;31mE (11371) task_wdt: CPU 1: IDLE1[0m

[0;31mE (11371) task_wdt: Print CPU 0 (current core) backtrace[0m

Backtrace: 0x400F1456:0x3FFB0B90 0x40082C75:0x3FFB0BB0 0x40008541:0x3FFC7610 0x40088625:0x3FFC7630 0x400F3C0E:0x3FFC7650 0x400D9D51:0x3FFC7680 0x400D85BA:0x3FFC7710 0x40175DF7:0x3FFC7730

etc.

Any idea why the watchdog is not reset?

What is your advice?

Kind regards

Vincent

***admin*** · Yesterday, 01:51 AM

which board you are using?
which firmware you downloaded?
please take photo with all details.

vdeconinck · Yesterday, 06:41 PM

(Yesterday, 01:51 AM)admin Wrote: which board you are using?
which firmware you downloaded?
please take photo with all details.

Thanks for your reply.

It is a Kincony KC868-A16 REV:1.6
I flashed KCS_KC868_A16_V2.2.20.zip from this thread https://www.kincony.com/forum/showthread.php?tid=9205
Here is a picture:

Filename: 20260412_170018_sml.jpg Size: 1.32 MB Yesterday, 06:40 PM

Vincent

***admin*** · Yesterday, 11:10 PM

take a photo of your esp download tool screen. i want to see how you set.

Login
Username:
Password:	Lost Password?
	Remember me