[BK7231N+BL0942] DIY Smart Mini Switch - WBP-1G - configuration, pinout, program

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#31 20522408 03 Apr 2023 09:34

p.kaczmarek2 p.kaczmarek2

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Post #31
20522408 03 Apr 2023 09:34

From what I can see, it was from him that a pull request appeared to increase the precision of BL0942:
https://github.com/openshwprojects/OpenBK7231T_App/pull/760
But I'm just going to verify it.

Don't forget to turn on PowerSave on this Aubess or else you'll be doing this:
https://www.elektroda.pl/rtvforum/topic3898805.html

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H 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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#32 20522473 03 Apr 2023 10:07

piratee piratee

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Post #32
20522473 03 Apr 2023 10:07

PowerSave run together with energy metering and ntp server? single line command?
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#33 20522566 03 Apr 2023 11:10

p.kaczmarek2 p.kaczmarek2

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Post #33
20522566 03 Apr 2023 11:10

Yes, but you can do it in autoexec.bat as well

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H 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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#34 20522567 03 Apr 2023 11:10

piratee piratee

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Post #34
20522567 03 Apr 2023 11:10

how to enter the NTP time offset to work after reboot in the block with ntp and bl0942 running?

ntp_timeZoneOfs +2
#35 20522640 03 Apr 2023 11:56

p.kaczmarek2 p.kaczmarek2

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Post #35
20522640 03 Apr 2023 11:56

Normally in the backlog, rather without +, just:

Code: text Expand Select all Copy to clipboard
ntp_timeZoneOfs 2

And it doesn't work?

If you want to subtract, then with a minus.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
#36 20522669 03 Apr 2023 12:12

piratee piratee

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Post #36
20522669 03 Apr 2023 12:12

When I typed +2 it didn't work, now it's ok
And you will also implement summer/winter automation.
I am asking because I see that the options in the project are developing dynamically.

Regards
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#37 20527971 06 Apr 2023 17:38

piratee piratee

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Post #37
20527971 06 Apr 2023 17:38

I have another question, if I read the firmware, can I determine which pinout is on my own.
Do I need to have any software or decompile the firmware?
#38 20528004 06 Apr 2023 17:58

p.kaczmarek2 p.kaczmarek2

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Post #38
20528004 06 Apr 2023 17:58

There's a python tool for that but you need to have it all installed, better put dunks here, I'm still helping out every morning, day and night.

Hmm, you could do automatic time switching, it's not a problem, but I'd have to look for a table so that I don't have to enter it in the code. But I admit in advance - I haven't checked yet.

Recently, I updated the documentation again and moved it from README (because it shouldn't be there) to JSON files to be able to autogenerate MDs and so on.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
#39 21759055 22 Nov 2025 17:06

sp8tlh1 sp8tlh1

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Post #39
21759055 22 Nov 2025 17:06

Hello, I am having a problem defining the switch configuration correctly. I am sending a copy of the original batch.

Attachments:

readResult_BK7231N_QIO_openbnk_2025-22-11-12-49-22.bin Download (2 MB)
#40 21759109 22 Nov 2025 17:52

p.kaczmarek2 p.kaczmarek2

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Post #40
21759109 22 Nov 2025 17:52

Code: text Expand Select all Copy to clipboard
Device seems to be using CB2S module, which is BK7231N chip. - Relay (channel 1) on P7 - WiFi LED on P26 - TglChannelToggle (channel 1) on P6 - Pair/Toggle All Pin on P23 - BL0942 (?) RX on P10 - BL0942 (?) TX on P11

Template OBK:
Code: JSON
Log in, to see the code

Remember to calibrate, as in Tasmot, VoltageSet, etc., possibly via the web App under Tools.

Can you show a picture of your unit?

Also enable PowerSave 1 (in startup command add).

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
#41 21759252 22 Nov 2025 20:30

sp8tlh1 sp8tlh1

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Post #41
21759252 22 Nov 2025 20:30

Thank you very much for your quick reply. I have another module of the same kind to reprogram and have checked how it works. Pressing the button on the housing switches the relay on and the same button switches the relay off. The LED lights up depending on the state of the relay. After entering this configuration, I can only switch the relay on via the browser and the LED does not respond to the relay status.

Added after 32 seconds:
#42 21760306 23 Nov 2025 21:00

sp8tlh1 sp8tlh1

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Post #42
21760306 23 Nov 2025 21:00

Everything already works as it did in the original before the software change. I can switch the relay physically with a button. To make it work for others starting out with the OpenBk software.
Go into Configure General/Flags disable the Flag 41 item - [BTN] Ignore all button events (aka child lock), give Submit and Save. And it should work.
I'm glad I managed it myself.
#43 21760314 23 Nov 2025 21:09

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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Post #43
21760314 23 Nov 2025 21:09

Sorry, I must have missed this post. Did you have the childlock flag enabled? Maybe something clicked earlier or the template imported wrong.

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
#44 21761197 24 Nov 2025 20:22

sp8tlh1 sp8tlh1

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Post #44
21761197 24 Nov 2025 20:22

There is nothing to apologise for. I have learned something new. The pros alone, the module works
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#45 21766227 29 Nov 2025 20:13

sp8tlh1 sp8tlh1

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Post #45
21766227 29 Nov 2025 20:13

How to enable NTP Driver and daily energy
#46 21767335 30 Nov 2025 20:07

sp8tlh1 sp8tlh1

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Post #46
21767335 30 Nov 2025 20:07

Hello, I have a problem with a module after adding to HA. HA module detects after MQTT and creates an entity. But the sensors have a status of unknown. I asked AI to diagnose and based on the log it stated:
OpenBK publishes data on topic:
tele/OpenBK_F85E000B6/ENERGY;
And entities created by Discovery are listening on topic type:
OpenBK_F85E000B6/voltage/get
OpenBK_F85E000B6/energycounter/get
OpenBK_F85E000B6/power/get
OpenBK does not publish data on these topics, so the entities remain empty.

Maybe some ideas on how to deal with this problem?
#47 21769452 02 Dec 2025 20:23

sp8tlh1 sp8tlh1

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Post #47
21769452 02 Dec 2025 20:23

Software version 1.18.221 now works without any problems.
Home Assistant detects the module without any problems and updates all sensors.
#48 21811486 17 Jan 2026 15:33

miegapele miegapele

Level 16
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Post #48
21811486 17 Jan 2026 15:33

Got this one too. It's great that it has power monitoring in live leg, so you can put in under switches without neutral going through. Also easy to change capacitors to better ones.
Tuya firmware though seems to be changed, and not much is readable (or is it bad read?) and so, I do not know pinout, but likely same as above?

Attachments:

readResult_BK7231N_QIO_2026-16-1-20-17-31.bin Download (2 MB)
#49 21811511 17 Jan 2026 16:06

p.kaczmarek2 p.kaczmarek2

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Post #49
21811511 17 Jan 2026 16:06

@divadiow and @insmod recently worked on improving GPIO detection, maybe it works with newer version of the flasher?

I am creating multiplatform open source firmware (Tasmota replacement), right now supporting BK7231T, BK7231N, XR809, BL602, W800, W600, LN882H and soon supporting RTL and W701:
https://github.com/openshwprojects/OpenBK7231T
If you like my work, support me at: https://paypal.me/openshwprojects

Helpful post? Buy me a coffee.
#50 21811555 17 Jan 2026 16:54

divadiow divadiow

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Post #50
21811555 17 Jan 2026 16:54

p.kaczmarek2 wrote:
@divadiow and @insmod recently worked on improving GPIO detection, maybe it works with newer version of the flasher?

extraction fails still even with the release with new methods added https://github.com/openshwprojects/BK7231GUIFlashTool/pull/100

this failure is because of how much of the json EF is looking through - try https://github.com/divadiow/BK7231GUIFlashTool/actions/runs/21092821480

Code: Text
Log in, to see the code

an example of:

divadiow wrote:
We've already seen users getting no extraction because EF doesn't show/match enough.

#51 21811634 17 Jan 2026 18:00

miegapele miegapele

Level 16

Post #51

21811634 17 Jan 2026 18:00

There is also BL0942 which app does not find. Online tool finds it:

Device seems to be using CB2S module, which is BK7231N chip.
- Relay (channel 1) on P7
- WiFi LED on P26
- TglChannelToggle (channel 1) on P6
- Pair/Toggle All Pin on P23
- BL0942 (?) RX on P10
- BL0942 (?) TX on P11

{
  "vendor": "Tuya",
  "bDetailed": "0",
  "name": "TODO",
  "model": "TODO",
  "chip": "BK7231N",
  "board": "CB2S",
  "keywords": ["switch", "power monitoring", "bl0942"],
  "pins": {
    "6": "TglChanOnTgl;1",
    "7": "Rel;1",
    "23": "Btn_Tgl_All;0",
    "26": "WifiLED_n;0"
  },
  "command": "startDriver BL0942",
  "image": "https://obrazki.elektroda.pl/YOUR_IMAGE.jpg",
  "wiki": "https://www.elektroda.com/rtvforum/topic_YOUR_TOPIC.html"
}

#52 21812126 18 Jan 2026 13:08

divadiow divadiow

Level 38

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Post #52
21812126 18 Jan 2026 13:08

miegapele wrote:
There is also BL0942 which app does not find. Online tool finds it:

hmm. hopefully something will change soon to sort/align all the extraction and parsing methods

Added after 2 [hours] 28 [minutes]:

>>21811634

dump for this one pairs as device with name "WBP-1G" which can be seen in device list too
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Topic summary

The discussion revolves around the DIY Smart Mini Switch identified as WBP-1G, which features energy measurement capabilities. Users share insights on programming the device, including pin configurations and firmware reading techniques. The BK7231N chip is confirmed to be in use, with suggestions for using specific software tools like BK7231GUIFlashTool and uartprogram for firmware management. Users discuss the pinout for the BL0942 energy measurement chip, troubleshooting issues related to device connections, and the importance of proper voltage handling to avoid damage. The conversation also touches on MQTT integration for IP transfer and the functionality of the energy meter. A new version of the switch with a different design is introduced, and users share their experiences with the device's performance and configuration.
Summary generated by the language model.

FAQ

TL;DR: 55 % discount made the Aubess WBP-1G cost just 22.6 PLN, yet “It’s deadly dangerous!” if powered from two supplies at once [Elektroda, piratee, #20521865; p.kaczmarek2, #20504131]. Check pinout, read a full 2 MB dump, then flash OpenBeken.

Why it matters: Correctly flashing this BK7231N+BL0942 switch avoids device loss and mains hazards.

Quick Facts

• MCU: BK7231N, 2 MB flash required for full dump [Elektroda, p.kaczmarek2, post #20493204] • Energy chip: BL0942 on UART1 (P10/P11) [Elektroda, p.kaczmarek2, post #20495963] • Key GPIOs (variant 2): Relay P26, Button P23, LED P8, Ext-Switch P24 [Elektroda, p.kaczmarek2, post #20521756] • Safe supply: 3.3 V UART only; never mix with 110-240 V mains [Elektroda, p.kaczmarek2, post #20504131] • Typical price: 22–40 PLN incl. shipping on AliExpress [Elektroda, posts #20521878, post #20521865]

What chips are inside the DIY Smart Mini Switch (WBP-1G)?

The board carries a BK7231N Wi-Fi MCU and a BL0942 power-monitoring ADC, giving Wi-Fi control plus voltage, current and energy data [Elektroda, p.kaczmarek2, post #20495963]

How do I take a correct 2 MB firmware dump under Windows?

Use BK7231 GUI Flash Tool; it auto-sets size. With uartprogram, add “-l 0x200000” and unprotect for N versions [Elektroda, p.kaczmarek2, post #20495547]

Which GPIO pins control the relay, button and LED on the second-revision board?

Relay P26, Wi-Fi LED P8, Pairing Button P23, External toggle P24; BL0942 stays on UART1 (P10/P11) [Elektroda, p.kaczmarek2, post #20521756]

Can I program the module without soldering every pad?

Yes. Clip 3.3 V, GND, RX, TX to the vertical CB2S board and flash OpenBeken successfully, no full disassembly needed [Elektroda, piratee, post #20521909]

What’s the safe way to power the switch during flashing?

Power from a 3.3 V USB-UART only. Never connect mains while the programmer is attached; dual supply sparked and destroyed both switch and converter [Elektroda, piratee, #20596570; p.kaczmarek2, #20504131].

Does OpenBeken publish the device IP over MQTT?

Yes. IP is sent on startup; see MQTT topic list in the OpenBK7231T README [Elektroda, p.kaczmarek2, post #20496024]

How can I enable PowerSave to cut idle draw by ~75 %?

Run command: PowerSave 1. Place it in autoexec.bat for persistence [Elektroda, p.kaczmarek2, post #20522566] A user measured 0.3 W vs 1.2 W after enabling “BL0942 Idle Study”.

How do I set timezone and keep it after reboot?

Enter: ntp_timeZoneOfs 2 (without plus sign). Put it in the same backlog or autoexec so it survives power cycles [Elektroda, p.kaczmarek2, post #20522640]

Will OpenBeken handle daylight-saving time automatically?

Not yet. Developers are considering table-based automatic DST switching, but no release implements it [Elektroda, p.kaczmarek2, post #20528004]

Where can I buy the switch and what does it cost?

AliExpress lists the Aubess 16 A module from 22 PLN (promo) to 40 PLN with shipping, depending on seller variants [Elektroda, piratee, #20521865; p.kaczmarek2, #20521878].

How do I calibrate the BL0942 measurements?

Open the WebApp after flashing; a ready-made calibration form sets voltage, current and power factors without command line [Elektroda, p.kaczmarek2, post #20496001]

Is there an automated way to extract pin configuration from a firmware dump?

Yes. A Python tool parses OpenBeken NVRAM, but it needs the full environment; posting the 2 MB dump to the forum gets community decoding [Elektroda, p.kaczmarek2, post #20528004]

What happens if I read only 1 MB instead of 2 MB?

OpenBeken settings sit near the flash end. A 1 MB dump loses them, forcing manual pin discovery and risking boot failure “90 % of configuration guesswork arises from short dumps” [Elektroda, p.kaczmarek2, post #20495017]