How to Flash BL602 Chip on Ewelink SM-028_V1.3 Smart Switch 16A from Aliexpress

Question

I got this device from Aliexpress I desoldered the module to flash it and i didn't see a config working for me so here it is

p.kaczmarek2 · Accepted Answer

Added, thank you: It's good to see another BL602 flashed.

divadiow · Accepted Answer

Powersave should be fixed, but to rule that out, remove powersave 1 - does it work after that?

Raufaser · Answer

I got a very similar switch from Aliexpress. (Looks different, but I could take the same config.)

PCB is different.

BL602 PCB in place and desoldered.

Wiring and setup of BuffaloDevCube for flashing

Button, LED and WebIF are working

Edit:
I used BuffaloDevCube incorrectly.

miegapele · Answer

You need to specify dts file in this flasher. If not specified, all devices will get the same MAC address. Added after 25 [minutes]:Your Mac is probably now C0:50:43:C9:00:01.

Raufaser · Answer

Ouch, I didn't know that. Is it worth to reflash in the correct way or is the real MAC address now gone bye bye?

miegapele · Answer

Real address would reappear if you reflash. If you have only one such device, it's not a big deal, but if you had two, it would not work properly on the network.

Raufaser · Answer

I rewired everything and flashed again. At first, the MAC wouldn't change. Then I toggled "Chip Erase" to true. Now the MAC address is completely different. Hopefully the right one. Thanks again for pointing out my mistake.

gregmarfaing · Answer

It's nice to see that my config is useful,
Anyway about the MAC address, I flashed mine with buffalo 1.4.8 and the MAC address is totally different from the "default" above without changing any setting and the UI is pretty different too
:

miegapele · Answer

Yes, because dts file is mandatory in this flasher

niterian · Answer

There's another device that looks different, but the same config works.

Aliexpress page: https://www.aliexpress.com/item/1005006157882766.html
I got it for 9.53 PLN, ~2.38 USD

Name on the package: Smart Switch DH-2015
Microcontroller module: SM-028_V1.3
Name on the main board: AIYATO-BRK-01

It connects with eWeLink app.

TX and RX are inconvenient to reach with soldering iron, so I desoldered the microcontroller module.

I've used BouffaloLabDevCube-v1.9.0.zip, it's convenient for me because it also has a Linux version.

Flash log:

Spoiler:


[20:55:17.102] - serial type is general
[20:55:17.150] - Open /dev/ttyUSB0 Success
[20:55:24.151] - Close /dev/ttyUSB0 Success
[20:55:24.160] - ========= Interface is Uart =========
[20:55:24.177] - eflash loader bin is eflash_loader_40m.bin
[20:55:24.180] - ========= chip flash id: ef4015 =========
[20:55:24.188] - create partition.bin, pt_new is True
[20:55:24.202] - fw_boot_head_gen xtal: 40M
[20:55:24.204] - Create bootheader using /home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini
[20:55:24.204] - Updating data according to </home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini[BOOTHEADER_CFG]>
[20:55:24.206] - Created file len:176
[20:55:24.211] - Create efuse using /home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini
[20:55:24.213] - Updating data according to </home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini[EFUSE_CFG]>
[20:55:24.215] - Created file len:128
[20:55:24.219] - ========= sp image create =========
[20:55:24.220] - Image hash is b'e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855'
[20:55:24.220] - Hash ignored
[20:55:24.220] - Header crc ignored
[20:55:24.220] - Write flash img
[20:55:24.221] - Encrypt efuse data
[20:55:24.223] - fw_boot_head_gen xtal: 40M
[20:55:24.225] - Create bootheader using /home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini
[20:55:24.225] - Updating data according to </home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini[BOOTHEADER_CFG]>
[20:55:24.226] - Created file len:176
[20:55:24.228] - Create efuse using /home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini
[20:55:24.229] - Updating data according to </home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini[EFUSE_CFG]>
[20:55:24.232] - Created file len:128
[20:55:24.235] - ========= sp image create =========
[20:55:24.236] - Image hash is b'83891c0734583b9209e28aeaba717f85657b94747f6c4f2cc1c71e7fd874b4e8'
[20:55:24.236] - Hash ignored
[20:55:24.237] - Header crc ignored
[20:55:24.237] - Write flash img
[20:55:24.238] - Encrypt efuse data
[20:55:24.244] - fw_boot_head_gen xtal: 40M
[20:55:24.246] - Create bootheader using /home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini
[20:55:24.246] - Updating data according to </home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini[BOOTHEADER_CFG]>
[20:55:24.249] - Created file len:176
[20:55:24.251] - Create efuse using /home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini
[20:55:24.252] - Updating data according to </home/niteria/tmp/BL602/chips/bl602/img_create_iot/efuse_bootheader_cfg.ini[EFUSE_CFG]>
[20:55:24.254] - Created file len:128
[20:55:24.258] - ========= sp image create =========
[20:55:24.261] - Image hash is b'd97b76ea1da04152d0006ef7ebd0034ac6c490d04b05b80c616ed2a6839ed1f1'
[20:55:24.261] - Header crc: b'745e8318'
[20:55:24.261] - Write flash img
[20:55:24.266] - Encrypt efuse data
[20:55:24.268] - FW Header is 176, 3920 still needed
[20:55:24.268] - FW OTA bin header is Done. Len is 4096
[20:55:24.332] - BL60X_OTA_Ver1.0
[20:55:24.396] - FW OTA bin is Done. Len is 790560
[20:55:24.631] - OTA XZ file len = 422652
[20:55:24.632] - Partiton len = 557056
[20:55:24.632] - BL60X_OTA_Ver1.0
[20:55:24.670] - FW OTA xz is Done
[20:55:24.670] - ========= eflash loader config =========
[20:55:24.671] - Image offset = 8192
[20:55:24.706] - =========/home/niteria/tmp/BL602/chips/bl602/device_tree/bl_factory_params_IoTKitA_40M.dts ——> /home/niteria/tmp/BL602/chips/bl602/device_tree/ro_params.dtb=========
[20:55:24.812] - True
[20:55:24.816] - Version: eflash_loader_v2.5.1
[20:55:24.816] - Program Start
[20:55:24.816] - ========= eflash loader cmd arguments =========
[20:55:24.817] - Config file: /home/niteria/tmp/BL602/chips/bl602/eflash_loader/eflash_loader_cfg.ini
[20:55:24.818] - serial port is /dev/ttyUSB0
[20:55:24.818] - cpu_reset=False
[20:55:24.818] - chiptype: bl602
[20:55:24.818] - ========= Interface is uart =========
[20:55:24.818] - com speed: 2000000
[20:55:24.818] - Eflash load helper file: /home/niteria/tmp/BL602/chips/bl602/eflash_loader/eflash_loader_40m.bin
[20:55:24.819] - ========= load eflash_loader.bin =========
[20:55:24.819] - Load eflash_loader.bin via uart
[20:55:24.819] - ========= image load =========
[20:55:25.020] - Not ack OK
[20:55:25.020] - FL
[20:55:25.021] - result: FL
[20:55:25.285] - tx rx and power off, press the machine!
[20:55:25.285] - cutoff time is 0.1
[20:55:25.386] - power on tx and rx
[20:55:26.109] - reset cnt: 0, reset hold: 0.005, shake hand delay: 0.1
[20:55:26.110] - clean buf
[20:55:26.111] - send sync
[20:55:26.312] - ack is 4f4b
[20:55:26.342] - shake hand success
[20:55:26.353] - get_boot_info
[20:55:26.357] - data read is b'01000000000000000300040095bc41fb3db81500'
[20:55:26.357] - ========= chipid: b83dfb41bc95 =========
[20:55:26.358] - last boot info: None
[20:55:26.358] - sign is 0 encrypt is 0
[20:55:26.359] - segcnt is 1
[20:55:26.368] - segdata_len is 38592
[20:55:26.453] - 4080/38592
[20:55:26.538] - 8160/38592
[20:55:26.622] - 12240/38592
[20:55:26.708] - 16320/38592
[20:55:26.793] - 20400/38592
[20:55:26.878] - 24480/38592
[20:55:26.963] - 28560/38592
[20:55:27.048] - 32640/38592
[20:55:27.134] - 36720/38592
[20:55:27.174] - 38592/38592
[20:55:27.177] - Run img
[20:55:27.280] - Load helper bin time cost(ms): 2461.21337890625
[20:55:27.381] - Flash load shake hand
[20:55:27.409] - default set DTR high
[20:55:27.510] - clean buf
[20:55:27.513] - send sync
[20:55:27.721] - ack is 4f4b
[20:55:27.753] - Read mac addr
[20:55:27.756] - macaddr: 95bc41fb3db8
[20:55:27.756] - flash set para
[20:55:27.757] - ========= flash read jedec ID =========
[20:55:27.760] - Read flash jedec ID
[20:55:27.760] - flash jedec id: ef401580
[20:55:27.760] - Finished
[20:55:27.767] - get flash size: 0x00200000
[20:55:27.768] - Program operation
[20:55:27.768] - ========= flash chip erase all =========
[20:55:28.779] - erase pending
[20:55:29.788] - erase pending
[20:55:30.797] - erase pending
[20:55:31.805] - erase pending
[20:55:32.814] - erase pending
[20:55:33.126] - Chip erase time cost(ms): 5357.541015625
[20:55:33.129] - Dealing Index 0
[20:55:33.130] - ========= programming /home/niteria/tmp/BL602/chips/bl602/img_create_iot/whole_img_boot2.bin to 0x00000000
[20:55:33.145] - ========= flash load =========
[20:55:33.145] - decompress write rx timeout: 24.576
[20:55:33.162] - decompress flash load 24060
[20:55:33.180] - Load 2048/24060 {"progress":8}
[20:55:33.204] - Load 4096/24060 {"progress":17}
[20:55:33.220] - Load 6144/24060 {"progress":25}
[20:55:33.237] - Load 8192/24060 {"progress":34}
[20:55:33.254] - Load 10240/24060 {"progress":42}
[20:55:33.271] - Load 12288/24060 {"progress":51}
[20:55:33.287] - Load 14336/24060 {"progress":59}
[20:55:33.304] - Load 16384/24060 {"progress":68}
[20:55:33.321] - Load 18432/24060 {"progress":76}
[20:55:33.338] - Load 20480/24060 {"progress":85}
[20:55:33.355] - Load 22528/24060 {"progress":93}
[20:55:33.368] - Load 24060/24060 {"progress":100}
[20:55:33.368] - Load 24060/24060 {"progress":100}
[20:55:33.368] - Write check
[20:55:33.386] - Flash load time cost(ms): 240.7587890625
[20:55:33.386] - Finished
[20:55:33.387] - Sha caled by host: 2f44f91873a18ff35cf93ab5a35dcde41ab8f075e21af450e904699bdabb0c01
[20:55:33.387] - xip mode Verify
[20:55:33.405] - Read Sha256/47808
[20:55:33.406] - Flash xip readsha time cost(ms): 16.298828125
[20:55:33.406] - Finished
[20:55:33.408] - Sha caled by dev: 2f44f91873a18ff35cf93ab5a35dcde41ab8f075e21af450e904699bdabb0c01
[20:55:33.408] - Verify success
[20:55:33.409] - Dealing Index 1
[20:55:33.409] - ========= programming chips/bl602/partition/partition.bin to 0x0000E000
[20:55:33.412] - ========= flash load =========
[20:55:33.416] - Load 272/272 {"progress":100}
[20:55:33.417] - Load 272/272 {"progress":100}
[20:55:33.417] - Write check
[20:55:33.419] - Flash load time cost(ms): 6.73876953125
[20:55:33.419] - Finished
[20:55:33.421] - Sha caled by host: fd6af18fc4aaf2807277cac767ca19d12af7b55f5ecbb8902ef28bc2430524aa
[20:55:33.421] - xip mode Verify
[20:55:33.427] - Read Sha256/272
[20:55:33.427] - Flash xip readsha time cost(ms): 2.95849609375
[20:55:33.427] - Finished
[20:55:33.429] - Sha caled by dev: fd6af18fc4aaf2807277cac767ca19d12af7b55f5ecbb8902ef28bc2430524aa
[20:55:33.431] - Verify success
[20:55:33.431] - Dealing Index 2
[20:55:33.431] - ========= programming chips/bl602/partition/partition.bin to 0x0000F000
[20:55:33.433] - ========= flash load =========
[20:55:33.438] - Load 272/272 {"progress":100}
[20:55:33.438] - Load 272/272 {"progress":100}
[20:55:33.438] - Write check
[20:55:33.441] - Flash load time cost(ms): 7.166259765625
[20:55:33.441] - Finished
[20:55:33.441] - Sha caled by host: fd6af18fc4aaf2807277cac767ca19d12af7b55f5ecbb8902ef28bc2430524aa
[20:55:33.441] - xip mode Verify
[20:55:33.446] - Read Sha256/272
[20:55:33.447] - Flash xip readsha time cost(ms): 2.978759765625
[20:55:33.447] - Finished
[20:55:33.449] - Sha caled by dev: fd6af18fc4aaf2807277cac767ca19d12af7b55f5ecbb8902ef28bc2430524aa
[20:55:33.450] - Verify success
[20:55:33.450] - Dealing Index 3
[20:55:33.450] - ========= programming /home/niteria/tmp/BL602/chips/bl602/img_create_iot/whole_img.bin to 0x00010000
[20:55:33.453] - ========= flash load =========
[20:55:33.453] - decompress write rx timeout: 24.576
[20:55:33.594] - decompress flash load 422652
[20:55:33.610] - Load 2048/422652 {"progress":0}
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[20:55:35.033] - Load 174080/422652 {"progress":41}
[20:55:35.049] - Load 176128/422652 {"progress":41}
[20:55:35.066] - Load 178176/422652 {"progress":42}
[20:55:35.083] - Load 180224/422652 {"progress":42}
[20:55:35.099] - Load 182272/422652 {"progress":43}
[20:55:35.116] - Load 184320/422652 {"progress":43}
[20:55:35.132] - Load 186368/422652 {"progress":44}
[20:55:35.149] - Load 188416/422652 {"progress":44}
[20:55:35.165] - Load 190464/422652 {"progress":45}
[20:55:35.181] - Load 192512/422652 {"progress":45}
[20:55:35.203] - Load 194560/422652 {"progress":46}
[20:55:35.220] - Load 196608/422652 {"progress":46}
[20:55:35.237] - Load 198656/422652 {"progress":47}
[20:55:35.253] - Load 200704/422652 {"progress":47}
[20:55:35.271] - Load 202752/422652 {"progress":47}
[20:55:35.287] - Load 204800/422652 {"progress":48}
[20:55:35.305] - Load 206848/422652 {"progress":48}
[20:55:35.322] - Load 208896/422652 {"progress":49}
[20:55:35.339] - Load 210944/422652 {"progress":49}
[20:55:35.355] - Load 212992/422652 {"progress":50}
[20:55:35.372] - Load 215040/422652 {"progress":50}
[20:55:35.389] - Load 217088/422652 {"progress":51}
[20:55:35.406] - Load 219136/422652 {"progress":51}
[20:55:35.422] - Load 221184/422652 {"progress":52}
[20:55:35.438] - Load 223232/422652 {"progress":52}
[20:55:35.455] - Load 225280/422652 {"progress":53}
[20:55:35.471] - Load 227328/422652 {"progress":53}
[20:55:35.488] - Load 229376/422652 {"progress":54}
[20:55:35.506] - Load 231424/422652 {"progress":54}
[20:55:35.522] - Load 233472/422652 {"progress":55}
[20:55:35.539] - Load 235520/422652 {"progress":55}
[20:55:35.556] - Load 237568/422652 {"progress":56}
[20:55:35.573] - Load 239616/422652 {"progress":56}
[20:55:35.590] - Load 241664/422652 {"progress":57}
[20:55:35.607] - Load 243712/422652 {"progress":57}
[20:55:35.623] - Load 245760/422652 {"progress":58}
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[20:55:35.656] - Load 249856/422652 {"progress":59}
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[20:55:35.706] - Load 256000/422652 {"progress":60}
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[20:55:35.756] - Load 262144/422652 {"progress":62}
[20:55:35.773] - Load 264192/422652 {"progress":62}
[20:55:35.789] - Load 266240/422652 {"progress":62}
[20:55:35.806] - Load 268288/422652 {"progress":63}
[20:55:35.823] - Load 270336/422652 {"progress":63}
[20:55:35.839] - Load 272384/422652 {"progress":64}
[20:55:35.855] - Load 274432/422652 {"progress":64}
[20:55:35.873] - Load 276480/422652 {"progress":65}
[20:55:35.890] - Load 278528/422652 {"progress":65}
[20:55:35.906] - Load 280576/422652 {"progress":66}
[20:55:35.923] - Load 282624/422652 {"progress":66}
[20:55:35.939] - Load 284672/422652 {"progress":67}
[20:55:35.956] - Load 286720/422652 {"progress":67}
[20:55:35.979] - Load 288768/422652 {"progress":68}
[20:55:35.995] - Load 290816/422652 {"progress":68}
[20:55:36.011] - Load 292864/422652 {"progress":69}
[20:55:36.035] - Load 294912/422652 {"progress":69}
[20:55:36.061] - Load 296960/422652 {"progress":70}
[20:55:36.078] - Load 299008/422652 {"progress":70}
[20:55:36.094] - Load 301056/422652 {"progress":71}
[20:55:36.125] - Load 303104/422652 {"progress":71}
[20:55:36.141] - Load 305152/422652 {"progress":72}
[20:55:36.165] - Load 307200/422652 {"progress":72}
[20:55:36.181] - Load 309248/422652 {"progress":73}
[20:55:36.206] - Load 311296/422652 {"progress":73}
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[20:55:36.972] - Load 393216/422652 {"progress":93}
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[20:55:37.186] - Load 415744/422652 {"progress":98}
[20:55:37.210] - Load 417792/422652 {"progress":98}
[20:55:37.235] - Load 419840/422652 {"progress":99}
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[20:55:37.275] - Load 422652/422652 {"progress":100}
[20:55:37.276] - Load 422652/422652 {"progress":100}
[20:55:37.276] - Write check
[20:55:37.287] - Flash load time cost(ms): 3833.3349609375
[20:55:37.287] - Finished
[20:55:37.289] - Sha caled by host: 375f0679af26704f9cac7aa98657add955103c6a04d4c601b6df78b414532e1a
[20:55:37.289] - xip mode Verify
[20:55:37.508] - Read Sha256/790560
[20:55:37.509] - Flash xip readsha time cost(ms): 217.718994140625
[20:55:37.510] - Finished
[20:55:37.513] - Sha caled by dev: 375f0679af26704f9cac7aa98657add955103c6a04d4c601b6df78b414532e1a
[20:55:37.514] - Verify success
[20:55:37.515] - Dealing Index 4
[20:55:37.515] - ========= programming chips/bl602/device_tree/ro_params.dtb to 0x001F8000
[20:55:37.522] - ========= flash load =========
[20:55:37.523] - decompress write rx timeout: 24.576
[20:55:37.528] - decompress flash load 1584
[20:55:37.541] - Load 1584/1584 {"progress":100}
[20:55:37.542] - Load 1584/1584 {"progress":100}
[20:55:37.542] - Write check
[20:55:37.560] - Flash load time cost(ms): 37.101318359375
[20:55:37.560] - Finished
[20:55:37.560] - Sha caled by host: 2030ce2a98174d1e1bc02905472a5c55ff0df9d7274c49efd787982af2430e58
[20:55:37.561] - xip mode Verify
[20:55:37.567] - Read Sha256/5982
[20:55:37.568] - Flash xip readsha time cost(ms): 5.524658203125
[20:55:37.568] - Finished
[20:55:37.571] - Sha caled by dev: 2030ce2a98174d1e1bc02905472a5c55ff0df9d7274c49efd787982af2430e58
[20:55:37.571] - Verify success
[20:55:37.571] - Program Finished
[20:55:37.571] - All time cost(ms): 12754.686767578125
[20:55:37.672] - close interface
[20:55:37.673] - [All Success]

First time I flashed I've made a mistake of not including the dts. I got the wrong MAC (C0:50:43:C9:00:01, same as others reported). It worked, but networking was flaky. After flashing with dts, it networking seems to work a lot better.

I flashed OpenBL602_1.18.42.bin, but never got it to connect to my network.

With this pull request https://github.com/openshwprojects/OpenBK7231...ions/runs/12794858548/job/35670919788?pr=1487, which I flashed with OTA, it connected to my network.

simonedlf1979 · Answer

>>20980720Hi, I tried to connect an external switch to S1/S2 but it doesn't work. How can I solve it?

p.kaczmarek2 · Answer

Do you mean with OpenBeken or Tuya?

simonedlf1979 · Answer

>>21537994 OpenBeken.

p.kaczmarek2 · Answer

Did you configure your GPIO? Have you extracted Tuya config? Which role is set for your S1/S2 inputs? Tuya config extraction:

AlexzeyK · Answer

Hello!
I have such a mini smart relay #21045630
I successfully flashed it with OB. In "clean" (unconfigured) form I can connect to its access point, configure from the main web menu, reboot and it works.

I'm facing a problem using app-import...
Here I am pasting a template from the devices page.

I immediately see the changes on the homepage.

The device works until reboot (cold or hot).
After rebooting I see the same access point, but I can't connect to it. From the WiFi monitor I can see that the access point is there. It works for some time 3-5 minutes and reboots. It is not possible to connect to it.
Is there any advice for me? What am I doing wrong?
Immediately after applying the template (without rebooting the device), I made a flash dump from the app flash menu.
app_flash_...A524A5.bin Download (2 MB)Points: 1 for user
then I rebooted the device. I couldn't connect to the access point (it's impossible to connect to this network). I did a flash dump in the BuffaloDevCube program.
bad_flash..dc.bin Download (2 MB)Points: 2 for user
It is possible to exit this mode only by reflashing the flash file (or a backup of the "clean" firmware, without settings).
If you flash this backup to "clean firmware" - it is not possible to connect to the access point. The problem is probably somewhere here...
Any ideas what the problem is?

AlexzeyK · Answer

@divadiow Thank you very much, my friend!Your advice worked. Now the relay works as it should.

divadiow · Answer

interesting. I notice earlier you said you rebooted and it was still broadcasting an AP, have you at any point had powersave 1 enabled and the device in STA mode connected to an AP itself?

I have just flashed 1.18.106 to a dev board and imported the template in the first post. My device is in STA mode and it is happy with powersave 1 in startup command.

AlexzeyK · Answer

>>21561424 yes. I agree with you. The problem is in powersave 1.
I just flashed 105 firmware and removed the powersave command from the generated script.

Rebooted the device. The device created an access point and I was able to connect to it. Previously (with powersave1) the device created an access point. But it was not possible to connect to it.
Now I erased the chip. Flashed 106 firmware and did not remove the powersave1 command from the script (ashere ). That is, I repeated everything from my post >>21560709 , but with 106 firmware. The result is the same: the device creates an access point, but it is not possible to connect to it.

divadiow · Answer

OK, but what if you join the device to your wifi/router? does powersave 1 work with device in STA mode?

AlexzeyK · Answer

>>21561491 Not working)I used the script without the powersave1 command. I did all the settings (MQTT, etc.), connected to the wifi router, rebooted. Everything works fine. The device received an IP, connected to the MQTT. Now I entered the powersave1 command, rebooted, and the device no longer appeared on the wifi network. Rebooting several times did not change the situation.

How to Flash BL602 Chip on Ewelink SM-028_V1.3 Smart Switch 16A from Aliexpress

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Topic summary