Yeelight lamp DIED after update!!!

Yeelight YLXD50YL (yeelink.light.ceiling20) DIED after update 2.1.7_0028.

Version: 2.1.7_0028
Release note: Solve the homekit offline problem caused by mdns , test only

Update screenshot

What’s happening:

  1. An update appeared in MiHome
  2. I clicked update
  3. I’ve been waiting for a long time (I waited for 100%).

After update:

  • The lamp is not visible in the app (MiHome App, Yeelight App).
  • The lamp does not connect to Wi-Fi (Router Mi AX6000).
  • The lamp is not reset to factory settings (5 time - 2 sec OFF, 2 sec ON).
  • Periodically, it turns on itself for one second and turns off immediately.

I used the TTL-to-USB module to get boot logs. After checking the logs, I realized that it was a bad firmware. ESP32 module reboots cyclically with “Guru Meditation Error”.

ESP32 LOGS
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:2
load:0x3fff0018,len:4
load:0x3fff001c,len:1136
ho 0 tail 12 room 4
load:0x40078000,len:8656
load:0x40080400,len:5892
entry 0x400806c4
08:00:00.020 [W] yglc loop started, wait msg ... (yglc_req_handler,1320)
08:00:00.040 [W] fast_reboot_count=5 (fast_reboot_check,4948)
08:00:00.040 [W] arch_flash: data from DROM. (arch_flash_write,74)
08:00:00.060 [W] 5 seconds timeout, restore ... (fast_reboot_check,4959)
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x401214c6  PS      : 0x00060330  A0      : 0x801213d9  A1      : 0x3ffd2cc0  
A2      : 0x00000001  A3      : 0x0000003c  A4      : 0x3ffd2cb0  A5      : 0x00008bd8  
A6      : 0xfffffffe  A7      : 0x3ffd2cc0  A8      : 0x801214c6  A9      : 0x3ffd2ca0  
A10     : 0x3ffd7510  A11     : 0x3ffd751c  A12     : 0x00000000  A13     : 0x00000000  
A14     : 0x00000000  A15     : 0x00000000  SAR     : 0x0000001e  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x0000003c  LBEG    : 0x40001609  LEND    : 0x4000160d  LCOUNT  : 0x00000000  

ELF file SHA256: 5f5f9c5fec575554

Backtrace: 0x401214c3:0x3ffd2cc0 0x401213d6:0x3ffd2ca0 0x401214c3:0x00000000 |<-CORRUPTED

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:2
load:0x3fff0018,len:4
load:0x3fff001c,len:1136
ho 0 tail 12 room 4
load:0x40078000,len:8656
load:0x40080400,len:5892
entry 0x400806c4
08:00:00.020 [W] yglc loop started, wait msg ... (yglc_req_handler,1320)
08:00:00.040 [W] fast_reboot_count=1 (fast_reboot_check,4948)
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x401214c6  PS      : 0x00060330  A0      : 0x801213d9  A1      : 0x3ffd2cc0  
A2      : 0x00000001  A3      : 0x0000003c  A4      : 0x3ffd2cb0  A5      : 0x00008ce0  
A6      : 0xfffffffe  A7      : 0x3ffd2cc0  A8      : 0x801214c6  A9      : 0x3ffd2ca0  
A10     : 0x3ffd7408  A11     : 0x3ffd7414  A12     : 0x00000000  A13     : 0x00000000  
A14     : 0x00000000  A15     : 0x00000000  SAR     : 0x0000001e  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x0000003c  LBEG    : 0x40001609  LEND    : 0x4000160d  LCOUNT  : 0x00000000  

ELF file SHA256: 5f5f9c5fec575554

Backtrace: 0x401214c3:0x3ffd2cc0 0x401213d6:0x3ffd2ca0 0x401214c3:0x00000000 |<-CORRUPTED

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:2
load:0x3fff0018,len:4
load:0x3fff001c,len:1136
ho 0 tail 12 room 4
load:0x40078000,len:8656
load:0x40080400,len:5892
entry 0x400806c4
08:00:00.020 [W] yglc loop started, wait msg ... (yglc_req_handler,1320)
08:00:00.040 [W] fast_reboot_count=2 (fast_reboot_check,4948)
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x401214c6  PS      : 0x00060330  A0      : 0x801213d9  A1      : 0x3ffd2cc0  
A2      : 0x00000001  A3      : 0x0000003c  A4      : 0x3ffd2cb0  A5      : 0x00008ce0  
A6      : 0xfffffffe  A7      : 0x3ffd2cc0  A8      : 0x801214c6  A9      : 0x3ffd2ca0  
A10     : 0x3ffd7408  A11     : 0x3ffd7414  A12     : 0x00000000  A13     : 0x00000000  
A14     : 0x00000000  A15     : 0x00000000  SAR     : 0x0000001e  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x0000003c  LBEG    : 0x40001609  LEND    : 0x4000160d  LCOUNT  : 0x00000000  

ELF file SHA256: 5f5f9c5fec575554

Backtrace: 0x401214c3:0x3ffd2cc0 0x401213d6:0x3ffd2ca0 0x401214c3:0x00000000 |<-CORRUPTED

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:2
load:0x3fff0018,len:4
load:0x3fff001c,len:1136
ho 0 tail 12 room 4
load:0x40078000,len:8656
load:0x40080400,len:5892
entry 0x400806c4
08:00:00.020 [W] yglc loop started, wait msg ... (yglc_req_handler,1320)
08:00:00.040 [W] fast_reboot_count=3 (fast_reboot_check,4948)
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x401214c6  PS      : 0x00060330  A0      : 0x801213d9  A1      : 0x3ffd2cc0  
A2      : 0x00000001  A3      : 0x0000003c  A4      : 0x3ffd2cb0  A5      : 0x00008ce0  
A6      : 0xfffffffe  A7      : 0x3ffd2cc0  A8      : 0x801214c6  A9      : 0x3ffd2ca0  
A10     : 0x3ffd7408  A11     : 0x3ffd7414  A12     : 0x00000000  A13     : 0x00000000  
A14     : 0x00000000  A15     : 0x00000000  SAR     : 0x0000001e  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x0000003c  LBEG    : 0x40001609  LEND    : 0x4000160d  LCOUNT  : 0x00000000  

ELF file SHA256: 5f5f9c5fec575554

Backtrace: 0x401214c3:0x3ffd2cc0 0x401213d6:0x3ffd2ca0 0x401214c3:0x00000000 |<-CORRUPTED

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:2
load:0x3fff0018,len:4
load:0x3fff001c,len:1136
ho 0 tail 12 room 4
load:0x40078000,len:8656
load:0x40080400,len:5892
entry 0x400806c4
08:00:00.020 [W] yglc loop started, wait msg ... (yglc_req_handler,1320)
08:00:00.040 [W] fast_reboot_count=4 (fast_reboot_check,4948)
Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC      : 0x401214c6  PS      : 0x00060330  A0      : 0x801213d9  A1      : 0x3ffd2cc0  
A2      : 0x00000001  A3      : 0x0000003c  A4      : 0x3ffd2cb0  A5      : 0x00008ce0  
A6      : 0xfffffffe  A7      : 0x3ffd2cc0  A8      : 0x801214c6  A9      : 0x3ffd2ca0  
A10     : 0x3ffd7408  A11     : 0x3ffd7414  A12     : 0x00000000  A13     : 0x00000000  
A14     : 0x00000000  A15     : 0x00000000  SAR     : 0x0000001e  EXCCAUSE: 0x0000001d  
EXCVADDR: 0x0000003c  LBEG    : 0x40001609  LEND    : 0x4000160d  LCOUNT  : 0x00000000  

ELF file SHA256: 5f5f9c5fec575554

Backtrace: 0x401214c3:0x3ffd2cc0 0x401213d6:0x3ffd2ca0 0x401214c3:0x00000000 |<-CORRUPTED

Rebooting...

How I fix a lamp?
To solve the problem, you need:

P.S. I don’t think I’ll buy another Yeelight device again! Although it was only the software that upset me, the hardware is just great!

维修条件太难了。我家四台灯,也升级了,希望别出问题。要不然这么难,咱们普通人怎么去修复啊

It’s easier for you, you are in China. You have a service center, we do not have it in Russia.
I’m hoping someone will send me a working firmware, but that’s unlikely.

I’ll go to Taobao asking some help for you, maybe need some time. Please wait for a time.

1 Like

帮您问淘宝客服了 需要您先提供下重置的操作视频

您能给个视频链接么 我也正在帮你要固件 可是我不知道能否要到

以下是我和客服的沟通记录

Thanks for trying to help! :grinning:

I’ll make a video now, but it just doesn’t make sense, I posted the ESP32 controller boot log. The logs show that the ESP32 cannot boot, and therefore a factory reset will not work.

客服说,升级失败不会影响重置功能。客服觉得应该是您重置方法不对。他还发了重置的方法给您。如下所示


另外,据我个人经验,我觉得如果您使用的是“凌动”开关的话,确实重置挺难的,我记得我有一次重置,搞了半天才重置成功。

一定要有重置成功的那种闪烁才可以。

As I already wrote, the lamp does not reset, does not blink.
Not defined in the application as new or old.

App Screenshot


Don’t worry man. Yeelight team will help. PM you.

这就好了,终于连上技术人员了。

No one has contacted me yet :frowning:
Sitting with family in the dark. We wait.

Temporary solution

能幫忙推送解決HomeKit 無回應的新版固件嗎?
家裡有兩顆吸頂燈跟10顆1s燈泡、燈條還有二代床頭燈。

米家id : 235856655
server : 中國大陸

Hello
Sorry to hear that your lamp isn’t working mate.
I’m on… 0038 firmware and it seems to work well atm.

Hello everyone!
Developers from Yeelight contacted me. This is wonderful! :innocent:
I was kindly provided with firmware, documentation and a firmware flasher.

At the moment I do not have the opportunity to flash the controller, I went on a business trip for a month.

In order not to leave the family without light, I temporarily flashed the controller with ESPHome firmware. At the moment, light control works through Home Assistant.

Screenshot



I will write down the factory firmware when I return from a business trip.
I will keep you posted. I think everything is going to be alright :wink:

Thank you Yeelight!

Hello,

The ceiling lights disconnect from the wifi 1-2 hours after reseting.

If i want to use them again, i need to restart the power supply.

ID:1916633266

This is happening since the last firmware update 8 months ago.

Please, help me.

I’m curious what that 3rd party firmware does…

  • Is it compatible with the original firmware? (Does it work with the yeelight app)?
  • are the lan-api commands the same?

Since you tried it (and since the github page contains barely any information on what to expect) could you give some info here? Thanks!

The firmware is not compatible with the Yeelight app. I temporarily use it with Home Assistant. This firmware has a drawback, it does not work with the Yeelight dimmer.

The developer sent me the original firmware, but it turned out to be incomplete, at the moment I’m waiting for a response from the developer by mail.

After 11 months with the issue and no answer in the forum, I have 2 expensive ceiling lights that I cannot use because they disconnect from wifi and the technical solution is “buy a new one”. Of course, they are telling me this now, after the guarantee expired. Thank you Yeelight for your great support. I will never buy a thing from you again.

@coasterli please send me the firmware, I have the same problem as chex01