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[BK7231N] COLOROCK Mini Smart Relay WiFi Switch 16A

[BK7231N] COLOROCK Mini Smart Relay WiFi Switch 16A

mattj 747 8

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Helpful post? (+2)

#1 05 Mar 2023 19:47

Hey all -

Yet another small in-wall relay. Looks very similar on the outside to the Aubess model, but it seems with a different board (so I figured it was worth it's own thread.)

Product URL: https://www.amazon.com/dp/B08RBNG2TX?psc=1&ref=ppx_yo2ov_dt_b_product_details

Chip: CB2S (BK7231N) https://developer.tuya.com/en/docs/iot/cb2s-module-datasheet?id=Kafgfsa2aaypq

Flashing:

Simple enough to flash, solder directly to the Tuya chip (no need to disconnect). Use BK7231Flasher at a 115200 Baud Rate.

I have a copy of the original firmware backup, not sure if that would be helpful / where to upload.

OpenBeken Config:
Code: text Expand Select all Copy to clipboard
"pins": { "8": "LED;0", "24": "Rel;0" },

Cool? Ranking DIY
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mattj mattj

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#2

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

Helpful post? (0)

#2 05 Mar 2023 19:54

Thanks, it seems like a very simple device, but I think you are still missing at least one IO role. The button on the case is separate from the switch, I think.

Btw, you can upload the binary 2MB here, as an attachment.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600 and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects
#3

mattj mattj

Level 6

Topic author Helpful post? (0)

#3 05 Mar 2023 21:20

Yes, you are correct about the button. I never bothered to test it (don't feel comfortable touching on the device while it's connected to the mains voltage), since I don't intend on using it.

I've got a second one here (not yet flashed) and I'll see if I can trace the pin for the button.

Edit: the button seems to go back to the TX1 pin (based on my multimeter) - haven't tested it though.
#4

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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#4 06 Mar 2023 10:58

I think that I could also extract pin mapping from 2MB firmware backup.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600 and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects
#5

mattj mattj

Level 6
Topic author Helpful post? (0)

#5 06 Mar 2023 17:06

Original FW attached. I will also try to submit to the Tuya CloudCutter team.

Attachments:

COLOROCK - Original - readResult_BK7231N_QIO.bin Download (2 MB)
#6

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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#6 08 Mar 2023 09:58

Okay, so we know where is the button, then which pin is used for the switch? For the toggleChannelOnToggle role?

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600 and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects
#7

mattj mattj

Level 6

Topic author Helpful post? (0)

#7 10 Mar 2023 02:51

Sorry not sure I follow the question? The config I found that works is to set P24 as a Relay.
#8

szymon122 szymon122

Level 38

» | Helpful post? (0)

#8 11 Mar 2023 13:32

How is the power supply of this module? What system is responsible for the 230V / 5V converters?
#9

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

» | Helpful post? (0)

#9 11 Mar 2023 16:08

@szymon122 in the smallest IoT gadgets that have recently appeared on the forum, there is practically always such a layout:

different bones are used but always something like this.
Sometimes I still come across small flyback power supplies (in slightly larger e.g. "smart" sockets/light switches) with feedback taken from the primary side without an optocoupler.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600 and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects
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[BK7231N] COLOROCK Mini Smart Relay WiFi Switch 16A