Yeelight lamp DIED after update!!!

chex01 · 2022 年1 月 10 日 19:02

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:

An update appeared in MiHome
I clicked update
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:

Official firmware (I’m kidding, no one will give it) … third-party firmware (for example this cool one: https://github.com/syssi/esphome-yeelight-ceiling-light).
Disassemble the lamp.
Wires.
Soldering iron.
TTL-to-USB module.
Straight arms.

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!

xuepiaojiangu · 2022 年1 月 14 日 23:23

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

chex01 · 2022 年1 月 15 日 08:32

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.

xuepiaojiangu · 2022 年1 月 15 日 11:19

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

xuepiaojiangu · 2022 年1 月 15 日 11:29

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

chex01 · 2022 年1 月 15 日 11:39

Thanks for trying to help!

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.

xuepiaojiangu · 2022 年1 月 15 日 11:47

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。

xuepiaojiangu · 2022 年1 月 15 日 11:49

一定要有重置成功的那种闪烁才可以。

chex01 · 2022 年1 月 15 日 12:07

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

App Screenshot

coasterli · 2022 年1 月 15 日 13:57

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

xuepiaojiangu · 2022 年1 月 16 日 00:03

这就好了，终于连上技术人员了。

chex01 · 2022 年1 月 16 日 06:46

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

Temporary solution

JasonTai · 2022 年1 月 16 日 13:04

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

taaviteder · 2022 年1 月 17 日 07:03

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

chex01 · 2022 年1 月 17 日 08:21

Hello everyone!
Developers from Yeelight contacted me. This is wonderful!
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

Thank you Yeelight!

Rdelatorre · 2022 年1 月 17 日 21:12

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.

kalmiya · 2022 年2 月 12 日 17:03

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!

chex01 · 2022 年2 月 21 日 17:17

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.

Rdelatorre · 2022 年3 月 8 日 18:51

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.

manek1 · 2022 年6 月 6 日 15:18

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