Sonoff B02-BLA60 E27 LED Bulb-opening, pics, flashing, boot log, module info [BL602][SM-030][BP5772]

Question

Sonoff B02-BL-A60 ES/E27 LED CW+WW bulb from Ali Express Removal of positive plug and then too brutal a removal of the screw fitting. Broke it even more trying to to reshape spares box to the rescue more internals Despite the pads being quite small it was still possible to solder without...

ferbulous · Answer

You should use one of these and tilt it left and right to remove the bottom screw and it should pop off easily

divadiow · Answer

Good thinking. I have similar actually but I don't know why I haven't made use of them for this purpose. 🤷‍♂️

aurismat · Answer

Hi, I was trying to do the same flash procedure to my own Sonoff B02-BL-A60 bulb with the procedure as seen both here and in B05-made video by Elektroda.

After some issues with temperamental flashing, I eventually succeeded in flashing the chip, but I couldn't get it to boot - it would seem to boot just enough to bring up the access point and even connect to it, but not enough to bring up the webUI to configure it.

For the record, I lacked a reasonable power supply so I just used an ESP-32 to supply the UART adapter and the chip with stable-ish 3.3v(my meter showed 3.2v, but I'm not sure I trust it to be accurate). Everything else I connected as per the diagram seen in the B05 flashing video.

Attaching a full boot log I've pulled from reading the UART when using dev cube. What seems to catch my attention that it crashed, and the last message was that 'romfs magic is NOT correct'. Anyone ever run into this and know how to fix it?

Full log:


Start Wi-Fi fw @169ms
1th channel,lo_vco_freq_cw=132
2th channel,lo_vco_freq_cw=131
3th channel,lo_vco_freq_cw=130
4th channel,lo_vco_freq_cw=129
5th channel,lo_vco_freq_cw=128
6th channel,lo_vco_freq_cw=127
7th channel,lo_vco_freq_cw=125
8th channel,lo_vco_freq_cw=124
9th channel,lo_vco_freq_cw=123
10th channel,lo_vco_freq_cw=122
11th channel,lo_vco_freq_cw=121
12th channel,lo_vco_freq_cw=120
13th channel,lo_vco_freq_cw=119
14th channel,lo_vco_freq_cw=118
15th channel,lo_vco_freq_cw=116
16th channel,lo_vco_freq_cw=115
17th channel,lo_vco_freq_cw=114
18th channel,lo_vco_freq_cw=113
19th channel,lo_vco_freq_cw=112
20th channel,lo_vco_freq_cw=111
21th channel,lo_vco_freq_cw=110
0th channel,vco_idac_cw=9
1th channel,vco_idac_cw=8
2th channel,vco_idac_cw=8
3th channel,vco_idac_cw=8
4th channel,vco_idac_cw=8
5th channel,vco_idac_cw=7
6th channel,vco_idac_cw=7
7th channel,vco_idac_cw=7
8th channel,vco_idac_cw=7
9th channel,vco_idac_cw=7
10th channel,vco_idac_cw=7
11th channel,vco_idac_cw=7
12th channel,vco_idac_cw=7
13th channel,vco_idac_cw=7
14th channel,vco_idac_cw=7
15th channel,vco_idac_cw=7
16th channel,vco_idac_cw=7
17th channel,vco_idac_cw=7
18th channel,vco_idac_cw=7
19th channel,vco_idac_cw=6
20th channel,vco_idac_cw=6
LO locked 9 122
rosdac_i_gc3=29
rosdac_i_gc2=29
rosdac_i_gc1=29
rosdac_i_gc0=29
rosdac_q_gc3=35
rosdac_q_gc2=35
rosdac_q_gc1=35
rosdac_q_gc0=35
rbb_cap1_fc_i=22,rbb_cap2_fc_i=22,rbb_cap1_fc_q=22,rbb_cap2_fc_q=22
new rbb_cap1_fc_i=46,rbb_cap2_fc_i=46,rbb_cap1_fc_q=46,rbb_cap2_fc_q=46
LO locked 9 122
amp=128,step=32,adc_mean_i=42
amp=160,step=16,adc_mean_i=61
amp=176,step=8,adc_mean_i=70
amp=184,step=4,adc_mean_i=75
amp=188,step=2,adc_mean_i=77
amp=190,step=1,adc_mean_i=78
amp=191,step=0,adc_mean_i=78
tmx_cs=0, tmxcs_pwr_avg=29644, tmxcs_pwr_avg>>10=28
tmx_cs=1, tmxcs_pwr_avg=38364, tmxcs_pwr_avg>>10=37
tmx_cs=2, tmxcs_pwr_avg=50645, tmxcs_pwr_avg>>10=49
tmx_cs=3, tmxcs_pwr_avg=65786, tmxcs_pwr_avg>>10=64
tmx_cs=4, tmxcs_pwr_avg=77454, tmxcs_pwr_avg>>10=75
tmx_cs=5, tmxcs_pwr_avg=76412, tmxcs_pwr 
[02:08:45.622] - Starting bl602 now....
Booting BL602 Chip...
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██████╔╝███████╗╚██████╔╝╚██████╔╝███████╗

╚═════╝ ╚══════╝ ╚═════╝  ╚═════╝ ╚══════╝



------------------------------------------------------------
RISC-V Core Feature:RV32-ACFIMX
Build Version:      release_bl_iot_sdk_1.6.22-22-g1d4ff804-dirty
Std Driver Version: 541807d
PHY   Version:      a0_final-73-g62481a0
RF    Version:      79cc6b9
Build Date:         Mar 30 2025
Build Time:         22:29:53
Boot Reason:        BL_RST_POWER_OFF
------------------------------------------------------------
Heap 126944@0x42023020, 5888@0x4204a900
Boot2 consumed 82ms

blog init set power on level 2, 2, 2.
[IRQ] Clearing and Disable all the pending IRQ...
------------------TRNG TEST---------------------------------
**********TRNG TEST rand[4be76d2c]**************
**********TRNG TEST rand[73221a4f]**************
------------------------------------------------------------
[         0][[32mINFO  [0m: hal_boot2.c: 285] [HAL] [BOOT2] Active Partition[0] consumed 596 Bytes
[         0][[32mINFO  [0m: hal_boot2.c:  82] ======= PtTable_Config @0x4200f0a4=======
[         0][[32mINFO  [0m: hal_boot2.c:  83] magicCode 0x54504642; version 0x0000; entryCnt 7; age 0; crc32 0x12DF9A26
[         0][[32mINFO  [0m: hal_boot2.c:  89] idx  type device activeIndex     name   Address[0]  Address[1]  Length[0]   Length[1]   age
[         0][[32mINFO  [0m: hal_boot2.c:  91] [00]  00     0         0            FW  0x00010000  0x000d8000  0x000c8000  0x00088000  0
[         0][[32mINFO  [0m: hal_boot2.c:  91] [01]  02     0         0           mfg  0x00160000  0x00000000  0x00032000  0x00000000  0
[         0][[32mINFO  [0m: hal_boot2.c:  91] [02]  03     0         0         media  0x00192000  0x00000000  0x00057000  0x00000000  0
[         0][[32mINFO  [0m: hal_boot2.c:  91] [03]  04     0         0           PSM  0x001e9000  0x00000000  0x00008000  0x00000000  0
[         0][[32mINFO  [0m: hal_boot2.c:  91] [04]  05     0         0           KEY  0x001f1000  0x00000000  0x00002000  0x00000000  0
[         0][[32mINFO  [0m: hal_boot2.c:  91] [05]  06     0         0          DATA  0x001f3000  0x00000000  0x00005000  0x00000000  0
[         0][[32mINFO  [0m: hal_boot2.c:  91] [06]  07     0         0       factory  0x001f8000  0x00000000  0x00007000  0x00000000  0
[         0][[32mINFO  [0m: bl_flash.c:  96] ======= FlashCfg magiccode @0x42049c18, code 0x47464346 =======
[         0][[32mINFO  [0m: bl_flash.c:  97] mid       0xEF
[         0][[32mINFO  [0m: bl_flash.c:  98] clkDelay    0x1
[         0][[32mINFO  [0m: bl_flash.c:  99] clkInvert    0x1
[         0][[32mINFO  [0m: bl_flash.c: 100] sector size   4KBytes
[         0][[32mINFO  [0m: bl_flash.c: 101] page size   256Bytes
[         0][[32mINFO  [0m: bl_flash.c: 102] ---------------------------------------------------------------
[         0][[32mINFO  [0m: hal_board.c:1249] [MAIN] [BOARD] [FLASH] addr from partition is 001f8000, ret is 0
[         0][[32mINFO  [0m: hal_board.c:1257] [MAIN] [BOARD] [XIP] addr from partition is 231e7000, ret is 0
[         0][[32mINFO  [0m: hal_board.c: 208] MAC address mode length 3
[         0][[32mINFO  [0m: hal_board.c: 212] MAC address mode is MBF
[         0][[32mINFO  [0m: hal_board.c: 194] Set MAC addrress 28:BB:E
[02:08:45.723] - D:30:C8:6D
[         0][[32mINFO  [0m: hal_board.c: 955] country_code : 86
[         0][[32mINFO  [0m: hal_board.c: 323] xtal_mode length 2
[         0][[32mINFO  [0m: hal_board.c: 327] xtal_mode is MF
[         0][[32mINFO  [0m: hal_board.c: 251] xtal dtb in DEC :36 36 0 60 60
[         0][[32mINFO  [0m: hal_board.c: 986] channel_div_table :
[         0][[36mBUF[0m: hal_board.c: 987] c4 4e ec 1e cb b7 fc 1e d2 20 0d 1f d8 89 1d 1f df f2 2d 1f e5 5b 3e 1f ec c4 4e 1f f2 2d 5f 1f f9 96 6f 1f 00 00 80 1f 06 69 90 1f 0d d2 a0 1f 13 3b 
[         0][[36mBUF[0m: hal_board.c: 987] b1 1f 89 9d d8 1f f8 81 1f 20 
[         0][[32mINFO  [0m: hal_board.c: 997] channel_cnt_table :
[         0][[36mBUF[0m: hal_board.c: 998] 8a a7 e3 a7 3c a8 95 a8 ed a8 46 a9 9f a9 f8 a9 51 aa aa aa 03 ab 5c ab b5 ab 8a ac 4d 46 00 00 6c e6 09 23 90 2f 02 42 00 d0 09 23 00 d0 09 23 00 d0 
[         0][[36mBUF[0m: hal_board.c: 998] 09 23 00 d0 09 23 
[         0][[32mINFO  [0m: hal_board.c:1006] lo_fcal_div : 1387
[         0][[32mINFO  [0m: hal_board.c:1025] pwr_table_11b :20 20 20 18
[         0][[32mINFO  [0m: hal_board.c:1045] pwr_table_11g :18 18 18 18 18 18 14 14
[         0][[32mINFO  [0m: hal_board.c:1065] pwr_table_11n :18 18 18 18 18 16 14 14
[         0][[32mINFO  [0m: hal_board.c: 523] pwr_mode length 2
[         0][[32mINFO  [0m: hal_board.c: 527] pwr_mode is bf
[         0][[32mINFO  [0m: hal_board.c: 415] pwr_offset from dtb:
[         0][[36mBUF[0m: hal_board.c: 416] 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 0a 
[         0][[32mINFO  [0m: hal_board.c: 421] pwr_offset from dtb (rebase on 10):
[         0][[36mBUF[0m: hal_board.c: 504]   0   0   0   0   0   0   0   0   0   0   0   0   0   0 
[         0][[32mINFO  [0m: hal_board.c:1086] set pwr_table_ble = 13 in dts
[         0][[32mINFO  [0m: hal_board.c: 687] ap_ssid string[0] = bl_test_005, ap_ssid_len = 11
[         0][[32mINFO  [0m: hal_board.c: 698] ap_psk string[0] = 12345678, ap_psk_len = 8
[         0][[32mINFO  [0m: hal_board.c: 707] ap_channel = 11
[         0][[32mINFO  [0m: hal_board.c: 635] [STA] ap_ssid string[0] = yourssid, ap_ssid_len = 8
[         0][[32mINFO  [0m: hal_board.c: 646] [STA] ap_psk string[0] = yourapssword, ap_psk_len = 12
[         0][[32mINFO  [0m: hal_board.c: 654] auto_connect_enable = 0
[         0][[32mINFO  [0m: hal_board.c: 749] Troom_os = -1, lentmp = 4
[         0][[32mINFO  [0m: hal_board.c: 758] linear_or_follow = 1, lentmp = 4
[         0][[32mINFO  [0m: hal_board.c: 767] Tchannels:2412,2427,2442,2457,2472,
[         0][[32mINFO  [0m: hal_board.c: 781] Tchannel_os:180,170,160,140,120,
[         0][[32mINFO  [0m: hal_board.c: 795] Tchannel_os_low:200,190,180,160,130,
[         0][[32mINFO  [0m: hal_board.c: 808] en_tcal = 0, lentmp = 4
sizeof(StackType_t)=4
[OS] Starting aos_loop_proc task...
[OS] Starting TCP/IP Stack...
-------------------->>>>>>>> LWIP tcp_port 56155
[OS] Starting OS Scheduler...
[BL] [SEC] TRNG Handler
=== 32 task inited
====== bloop dump ======
  bitmap_evt 0
  bitmap_msg 0
--->>> timer list:
  32 task:
    task[31] : SYS [built-in]
      evt handler 0x2306b110, msg handler 0x2306b0e0, trigged cnt 0, bitmap async 0 sync 0, time consumed 0us acc 0ms, max 0us
    task[30] : empty
    task[29] : empty
    task[28] : empty
    task[27] : empty
    task[26] : empty
    task[25] : empty
    task[24] : empty
    task[23] : empty
    task[22] : empty
    task[21] : empty
    task[20] : empty
    task[19] : empty
    task[18] : empty
    task[17] : empty
    task[16] : empty
    task[15] : empty
    task[14] : empty
    task[13] : empty
    task[12] : empty
    task[11] : empty
    task[10] : empty
    task[09] : empty
    task[08] : empty
    task[07] : empty
    task[06] : empty
    task[05] : empty
    task[04] : empty
    task[03] : empty
    task[02] : empty
    task[01] : empty
    task[00] : empty
[MTD] >>>>>> Hanlde info Dump >>>>>>
      name PSM
      id 0
      offset 0x001e9000(2002944)
      size 0x00008000(32Kbytes)
      xip_addr 0x231d8000
[MTD] <<<<<< Hanlde info End <<<<<<
[EF] Found Valid PSM partition, XIP Addr 231d8000, flash addr 001e9000
*default_env_size = 0x00000001
ENV start address is 0x00000000, size is 32768 bytes.
EasyFlash V4.0.99 is initialize success
.
You can get the latest version on https://github.com/armink/EasyFlash .
[        28][[32mINFO  [0m: hal_uart.c: 364] uart[0] rx_buf_size 512, tx_buf_size 512
[        29][[32mINFO  [0m: hal_uart.c: 379] uart[0] cts status = disable lentmp = 7
[        30][[32mINFO  [0m: hal_uart.c: 379] uart[0] rts status = disable lentmp = 7
[        30][[32mINFO  [0m: hal_uart.c: 402] id = 0, tx = 16, rx = 7, cts = 255, rts = 255 baudrate = 2000000.
[        31][[32mINFO  [0m: hal_uart.c: 410] bl_uart_init 0 ok.
[        31][[32mINFO  [0m: hal_uart.c: 411] bl_uart_init 0 baudrate = 2000000 ok.
[        33][[32mINFO  [0m: hal_uart.c: 364] uart[1] rx_buf_size 512, tx_buf_size 512
[        34][[32mINFO  [0m: hal_uart.c: 379] uart[1] cts status = disable lentmp = 7
[        34][[32mINFO  [0m: hal_uart.c: 379] uart[1] rts status = disable lentmp = 7
[        35][[32mINFO  [0m: hal_uart.c: 402] id = 1, tx = 4, rx = 3, cts = 255, rts = 255 baudrate = 115200.
[        35][[32mINFO  [0m: hal_uart.c: 410] bl_uart_init 1 ok.
[        36][[32mINFO  [0m: hal_uart.c: 411] bl_uart_init 1 baudrate = 115200 ok.
[        36][[32mINFO  [0m: hal_gpio.c: 202] [HAL] [GPIO] Max num is 40
[        37][[32mINFO  [0m: hal_gpio.c: 177] New CONF: GPIO05: feature 0, active 1, mode 0, time 100
[        38][[32mINFO  [0m: loopset_led.c:  75] [LED] New Trigger: PIN 5, active level Lo, type Blink
[        39][[32mINFO  [0m: hal_gpio.c: 115] [gpio1] status = disable
[        39][[31mERROR
[0m: hal_gpio.c: 216] gpio1: unvalid GPIO config
[        40][[31mERROR
[0m: hal_gpio.c: 130] gpio2: unvalid GPIO config button
[        40][[31mERROR
[0m: hal_gpio.c: 216] gpio2: unvalid GPIO config
[        41][[32mINFO  [0m: hal_gpio.c: 106] gpio3 NOT found
[MTD] >>>>>> Hanlde info Dump >>>>>>
      name media
      id 0
      offset 0x00192000(1646592)
      size 0x00057000(348Kbytes)
      xip_addr 0x23181000
[MTD] <<<<<< Hanlde info End <<<<<<
[        42][[31mERROR
[0m: bl_romfs.c: 146] romfs magic is NOT correct

divadiow · Answer

Code: TextLog in, to see the code has been seen even on the boot log of factory firmware so I wouldn't worry about this. BL602 is notoriously fussy with power so it's more likely to be that. does it crash and stop though or does it boot loop? Have you tried it soldered back in and on mains power in a safe way?

aurismat · Answer

>>21503004

Update on my situation: seems like @divadiow was correct - all it was just the BL602 being pissy about it's 3.3v line. Upon getting a more 'normal' breadboard to set up the power and boot pins, not only it flashed first try but also brought up the AP without issue. Reassembling the bulb as we speak, if all works well I'll reassemble it with some thermal glue I've got today along with proper power supplying.

To those who read this in the future - have a solid power supply that can provide stable 3.3v!

Anyway, thanks for your help.

Sonoff B02-BLA60 E27 LED Bulb-opening, pics, flashing, boot log, module info [BL602][SM-030][BP5772]

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