Hi. I want to install Openbeken on a socket from Action, LSC Smart Home plug. It is in on a CB2S board. The first time I installed, only the blue LED was on. The second time I reflashed and it doesn't work at all. How to upload properly on this socket? I understand that you have to copy these...

Name: OpenBeken on LSC Smart Plug CB2S (Action) - how to upload and use the template correctly?
Uploaded: 2025-12-03T12:15:42+01:00
Description: Hi. I want to install Openbeken on a socket from Action, LSC Smart Home plug. It is in on a CB2S board. The first time I installed, only the blue LED was on. The second time I reflashed and it doesn't work at all. How to upload properly on this socket? I understand that you have to copy these...

CH341 has an AMS1117-3.3V on the LDO board. At this point you can do two things: 1. peel off the sticker, is it definitely a BK7231N or maybe a BK7231M? There have been cases like this 2. This is what the log shows on the UART under TX2 at 115200 baud? Added after 1 [minutes]: It would also help a lot if you posted a 2MB copy of the original batch, then we could see if it runs on a normal CB2S

Can you show where specifically the HA has changed, etc.? You do the HA Discovery operation on OpenBeken, how HA displays it is a matter for HA. You simply type in the MQTT bearing and start Discovery.

And I see, HA has changed the interface for downloading the MQTT password. So much for this being a rather independent piece of configuration and on top of that it is rather basic, one can assume that the user rather knows himself how to retrieve his broker's bearing beforehand.... i will think about possibly recording a newer version of the video. And the socket itself sees the energy measurement? HA Discovery has to be done with that measurement on, if you do Discovery first and then turn the measurement on, HA won't see it.

You upload the templates via the web panel i wouldn't worry about them at this stage. The first step is to upload the batch to the socket so that the access point configuration appears. The access point should appear even if you have a loose CB2S soldered out, as long as you supply it with 3.3V and the power supply has sufficient current capacity - the 3.3V pin from CH340 is not enough. If, by some miracle, the access point doesn't appear at all (even after cutting it off for a while and restoring power) then you only have to think and look for what's wrong. I've programmed hundreds of devices myself and don't remember such a situation at my place, but the basic diagnosis is to collect the UART log from the TX2 pin on the back CB2S, baud 115200, to debug log output. As long as you have a copy of the original batch from before pairing with Tuya, you can post that too, it will allow us to see what device you have and maybe extract its pins. Occasionally on the forum we've already come across unusual circuits like the BK7231M (not N) in the chassis from the CB2S, so it's potentially worth checking further to see what's going on, whereas I wouldn't be concerned about damaging the CB2S - you're unlikely to break it. Maybe show pictures of what it looks like now to start with, as that might help with diagnosis too. How do you power the CB2S, etc. I always power through a separate 3.3V LDO on the board (I have a TC1264-3.3V, but it could be any 3.3V) and it always works. If the current capacity is too low, the CB2S will fall into a boot loop and not show AP.

He programs through this programmer. Do you think it gives it too little current to fire it up? I'll have to find a 3.3V stabiliser somewhere on the board then. ;(

Still nothing. It installs as shown in the screenshot. I also tried with the U, M etc tip but then it shows errors. I powered it with a lab power supply, gave it 3.3V and 1A but it doesn't even eat 0.01A. What am I doing wrong? ;( PS. There are no shorts on the pins. It just looks like this in the picture.

Uploading JSON templates: Pairing with HA: Very important - enable PowerSave: Adding devices to Windows Network Places (SSDP): Control from the Tasmota Control app:

Ok. Thank you. Somehow I almost managed to do it. Unfortunately these videos are outdated, because HA itself and the add-ons already look different and are configured differently. Or (as is likely) I'm too stupid for that. I would also add that it is actually a BK7231N. I won't insert a picture of the circuit because I haven't gotten a microscope camera yet

E.g. video 2, 1:00 minute of the video. i have no such thing as a configuration in the MQTT add-on. I have something like this: EDIT: Why do I have 16 entities together with energy in LSC1, while LSC2 has 7 entities and none with energy (energy, I mean sensors)? I've checked everything I think, and it seems that everything is configured the same. What to check?

Thanks. They appeared on their own, probably HA must have thought of something. And as for the tutorials, I don't resent just HA or those who make these add-ons like MQTT mix things up too much. I am slowly starting to think about going back from HA to iObroker because I thought HA must be easy like everyone else has and yet not so much for me. As for that password, I didn't download it. (That long string of random characters) because I don't even know where it is. For that I added in MQTT in HA in the configuration my username and password and the same I entered in OpenBeken and it's guitar

Well, unfortunately, I am well aware of this, they like to rummage around and make nonsense changes that spoil older material. So much the good thing about OBK is that you just need to know those MQTT contacts and that's it. I'm also on the other side of software development myself, but at my place I just try to avoid spoiling backward compatibility if I can. What's difficult about HA? If you have any suggestions on what I can cover in a tutorial on the forum, let me know. For now, I'm planning a material about the button-card plugin from HACS.

It's just these frequent nonsense changes, even to a stupid interface and then the whole entities, srences, helpers, assholes thing gets all confused. At least for me. This kind of material is useful. Some more about how to make yourself a cool dashboard panel to have a tablet on the wall with it. In general, I watch you a lot here on the forum, I read your various tests, etc. for which you a lot of praise and thanks. I can not hide that by creating a topic here, I hoped that you will help and I was not wrong already once helped me with NSpanel

OpenBeken on LSC Smart Plug CB2S (Action) - how to upload and use the template correctly?

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#1 21766621 30 Nov 2025 10:39

artin.bruyen artin.bruyen

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Post #1
21766621 30 Nov 2025 10:39

Hi. I want to install Openbeken on a socket from Action, LSC Smart Home plug.
It is in on a CB2S board.
The first time I installed, only the blue LED was on. The second time I reflashed and it doesn't work at all. How to upload properly on this socket?
I understand that you have to copy these templates to the flasher, but how and what.
In general, it is a small "mess" on the forum, making it a problem for me amateur OBK to find specific infromation.
Thanks in advance.

PS. If the wrong section then please move to the correct one

https://www.elektroda.pl/rtvforum/topic4087228.html
I flash according to this tutorial and nothing. Seemingly the installation completes successfully, but the wifi does not see the hotspot. I have soldered the board even from this socket and it doesn't do anything.
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#2 21767604 01 Dec 2025 00:43

p.kaczmarek2 p.kaczmarek2

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Post #2
21767604 01 Dec 2025 00:43

You upload the templates via the web panel https://www.youtube.com/watch?v=WunlqIMAdgw
i wouldn't worry about them at this stage.

The first step is to upload the batch to the socket so that the access point configuration appears. The access point should appear even if you have a loose CB2S soldered out, as long as you supply it with 3.3V and the power supply has sufficient current capacity - the 3.3V pin from CH340 is not enough.

If, by some miracle, the access point doesn't appear at all (even after cutting it off for a while and restoring power) then you only have to think and look for what's wrong. I've programmed hundreds of devices myself and don't remember such a situation at my place, but the basic diagnosis is to collect the UART log from the TX2 pin on the "back" CB2S, baud 115200, to debug log output.

As long as you have a copy of the original batch from before pairing with Tuya, you can post that too, it will allow us to see what device you have and maybe extract its pins.

Occasionally on the forum we've already come across unusual circuits like the BK7231M (not N) in the chassis from the CB2S, so it's potentially worth checking further to see what's going on, whereas I wouldn't be concerned about damaging the CB2S - you're unlikely to break it.

Maybe show pictures of what it looks like now to start with, as that might help with diagnosis too. How do you power the CB2S, etc. I always power through a separate 3.3V LDO on the board (I have a TC1264-3.3V, but it could be any 3.3V) and it always works. If the current capacity is too low, the CB2S will fall into a boot loop and not show AP.

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.
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#3 21767920 01 Dec 2025 13:00

artin.bruyen artin.bruyen

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Post #3
21767920 01 Dec 2025 13:00

He programs through this programmer. Do you think it gives it too little current to fire it up?
I'll have to find a 3.3V stabiliser somewhere on the board then. ;(
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#4 21769855 03 Dec 2025 10:32

artin.bruyen artin.bruyen

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Post #4
21769855 03 Dec 2025 10:32

Still nothing. It installs as shown in the screenshot. I also tried with the U, M etc tip but then it shows errors.
I powered it with a lab power supply, gave it 3.3V and 1A but it doesn't even eat 0.01A.
What am I doing wrong? ;(

PS. There are no shorts on the pins. It just looks like this in the picture.
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#5 21769872 03 Dec 2025 10:44

p.kaczmarek2 p.kaczmarek2

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Post #5
21769872 03 Dec 2025 10:44

CH341 has an AMS1117-3.3V on the LDO board.

At this point you can do two things:
1. peel off the sticker, is it definitely a BK7231N or maybe a BK7231M? There have been cases like this
2. This is what the log shows on the UART under TX2 at 115200 baud?

Added after 1 [minutes]:

It would also help a lot if you posted a 2MB copy of the original batch, then we could see if it runs on a normal CB2S

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.
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#6 21769936 03 Dec 2025 11:51

artin.bruyen artin.bruyen

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Post #6

21769936 03 Dec 2025 11:51

I accidentally junked that circuit there, I dialled the voltage wrong on the power supply

but nothing lost, I took the other socket and reflashed it. Success. It worked. I connected to it normally, but now I don't know myself what to configure next to hook it up to HA. I also have a Zigbee gateway as something.
Would you advise what to enter and where? Those jonson etc?


{
	"sel_pin_pin":"11",
	"rl1_lv":"1",
	"bt1_pin":"7",
	"led1_pin":"6",
	"net_trig":"4",
	"jv":"1.0.4",
	"netled1_lv":"1",
	"netled_reuse":"1",
	"bt1_type":"0",
	"ffc_select":"1",
	"vi_pin":"24",
	"over_cur":"17800",
	"resistor":"1",
	"bt1_lv":"0",
	"reset_t":"5",
	"netled1_pin":"10",
	"chip_type":"0",
	"lose_vol":"180",
	"over_vol":"264",
	"module":"CB2S",
	"ele_pin":"26",
	"ch_cddpid1":"9",
	"ch1_stat":"0",
	"led1_lv":"1",
	"rl1_type":"0",
	"ch_num":"1",
	"ele_fun_en":"1",
	"rl1_pin":"8",
	"vol_def":"0",
	"ch_dpid1":"1",
	"sel_pin_lv":"1",
	"crc":"98"
}




Device configuration, as extracted from Tuya: 
- BL0937 SEL on P11
- Button (channel 1) on P7
- LED (channel 1) on P6
- BL0937 VI (CF1) on P24
- WiFi LED on P10
- BL0937 ELE (CF) on P26
- Relay (channel 1) on P8
Device seems to be using CB2S module, which is using BK7231N.
And the Tuya section starts, as usual, at 2023424

#7 21769948 03 Dec 2025 12:15

p.kaczmarek2 p.kaczmarek2

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Post #7
21769948 03 Dec 2025 12:15

Uploading JSON templates:

Pairing with HA:

Very important - enable PowerSave:

Adding devices to Windows Network Places (SSDP):

Control from the Tasmota Control app:

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.
#8 21769991 03 Dec 2025 13:00

artin.bruyen artin.bruyen

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Post #8
21769991 03 Dec 2025 13:00

Ok. Thank you. Somehow I almost managed to do it. Unfortunately these videos are outdated, because HA itself and the add-ons already look different and are configured differently. Or (as is likely) I'm too stupid for that.

I would also add that it is actually a BK7231N.
I won't insert a picture of the circuit because I haven't gotten a microscope camera yet
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#9 21770001 03 Dec 2025 13:06

p.kaczmarek2 p.kaczmarek2

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Post #9
21770001 03 Dec 2025 13:06

Can you show where specifically the HA has changed, etc.? You do the HA Discovery operation on OpenBeken, how HA displays it is a matter for HA. You simply type in the MQTT bearing and start Discovery.

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.
#10 21770012 03 Dec 2025 13:17

artin.bruyen artin.bruyen

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Post #10
21770012 03 Dec 2025 13:17

E.g. video 2, 1:00 minute of the video. i have no such thing as a configuration in the MQTT add-on. I have something like this:

EDIT:
Why do I have 16 entities together with energy in LSC1, while LSC2 has 7 entities and none with energy (energy, I mean sensors)? I've checked everything I think, and it seems that everything is configured the same. What to check?
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#11 21770117 03 Dec 2025 15:02

p.kaczmarek2 p.kaczmarek2

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Post #11
21770117 03 Dec 2025 15:02

And I see, HA has changed the interface for downloading the MQTT password. So much for this being a rather independent piece of configuration and on top of that it is rather basic, one can assume that the user rather knows himself how to retrieve his broker's bearing beforehand.... i will think about possibly recording a newer version of the video.

And the socket itself sees the energy measurement? HA Discovery has to be done with that measurement on, if you do Discovery first and then turn the measurement on, HA won't see it.

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.
#12 21770143 03 Dec 2025 15:37

artin.bruyen artin.bruyen

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Post #12
21770143 03 Dec 2025 15:37

p.kaczmarek2 wrote:
As I see it, HA has changed the interface for retrieving the MQTT password. So much for this being a rather independent configuration item and on top of that it is rather basic, one can assume that the user rather knows himself how to retrieve his broker's bearing beforehand.... i will think about possibly recording a newer version of the video.

And the socket itself sees the energy measurement? HA Discovery needs to be done with that measurement on, if you do Discovery first and then turn the measurement on, HA won't see it.

Thanks. They appeared on their own, probably HA must have "thought of something".
And as for the tutorials, I don't resent just HA or those who make these add-ons like MQTT mix things up too much. I am slowly starting to think about going back from HA to iObroker because I thought HA must be easy like everyone else has and yet not so much for me.

As for that password, I didn't download it. (That long string of random characters) because I don't even know where it is. For that I added in MQTT in HA in the configuration my username and password and the same I entered in OpenBeken and it's guitar
#13 21770227 03 Dec 2025 17:19

p.kaczmarek2 p.kaczmarek2

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Post #13
21770227 03 Dec 2025 17:19

Well, unfortunately, I am well aware of this, they like to rummage around and make nonsense changes that spoil older material. So much the good thing about OBK is that you just need to know those MQTT contacts and that's it.

I'm also "on the other side" of software development myself, but at my place I just try to avoid spoiling backward compatibility if I can.

What's difficult about HA? If you have any suggestions on what I can cover in a tutorial on the forum, let me know. For now, I'm planning a material about the button-card plugin from HACS.

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.
#14 21770320 03 Dec 2025 19:03

artin.bruyen artin.bruyen

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Post #14
21770320 03 Dec 2025 19:03

p.kaczmarek2 wrote:

What is difficult about HA? If you have any suggestions on what I can cover in a tutorial on the forum, let me know. For now, I'm planning material about the button-card plugin from HACS.

It's just these frequent nonsense changes, even to a stupid interface and then the whole entities, srences, helpers, assholes thing gets all confused. At least for me.
This kind of material is useful. Some more about how to make yourself a cool dashboard panel to have a tablet on the wall with it.
In general, I watch you a lot here on the forum, I read your various tests, etc. for which you a lot of praise and thanks.

I can not hide that by creating a topic here, I hoped that you will help and I was not wrong already once helped me with NSpanel
Create an account, log in here. You will receive points by participating in discussions.
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FAQ

TL;DR: Flash OpenBeken to the LSC CB2S, power it with a real 3.3V supply, then verify at 115200 baud; “the 3.3V pin from CH340 is not enough.” [Elektroda, p.kaczmarek2, post #21767604]

Why it matters: This FAQ helps newcomers fix no-AP boots, load the right template, and finish MQTT/HA setup for Action LSC plugs.

Quick Facts

Power the CB2S with a dedicated 3.3V regulator; don’t use the CH340’s 3.3V pin. Low current can cause boot loops and no AP. [Elektroda, p.kaczmarek2, post #21767604]
Debug first boot with UART on TX2 at 115200 baud to capture logs. [Elektroda, p.kaczmarek2, post #21767604]
This LSC Smart Plug reports as CB2S using BK7231N, with Tuya data starting at 2,023,424 bytes. [Elektroda, artin.bruyen, post #21769936]
Core pin map: Relay P8, Button P7, LED P6, Wi‑Fi LED P10, BL0937 SEL P11, CF1 P24, CF P26. [Elektroda, artin.bruyen, post #21769936]
Enable energy measurement before running HA Discovery; otherwise entities won’t appear. [Elektroda, p.kaczmarek2, post #21770117]

How do I correctly power the CB2S during flashing so the AP appears?

Use a stable external 3.3V LDO/regulator with enough current; avoid the CH340’s 3.3V pin. After flashing, cycle power and wait for the AP. Insufficient current can cause boot loops and no access point. “The 3.3V pin from CH340 is not enough.” [Elektroda, p.kaczmarek2, post #21767604]

What’s the quickest 3‑step path to first boot with OpenBeken?

Flash firmware, then power CB2S from a dedicated 3.3V regulator.
After power cycle, connect to the OBK access point to open the web panel.
If no AP, read UART TX2 at 115200 baud and check logs. [Elektroda, p.kaczmarek2, post #21767604]

How do I upload the JSON template for this LSC plug?

Open the OpenBeken web panel and import the JSON template there. Focus on getting the AP up first; templates come after basic bring‑up. [Elektroda, p.kaczmarek2, post #21767604]

What are the correct pin assignments for the LSC Smart Plug with BL0937?

Relay P8, Button P7, LED P6, Wi‑Fi LED P10, BL0937 SEL P11, CF1 P24, CF P26. These were extracted from the Tuya dump of the same device. [Elektroda, artin.bruyen, post #21769936]

How do I pair OpenBeken with Home Assistant (HA)?

Configure your MQTT broker address, username, and password in OpenBeken, then enable HA Discovery. Finish any HA‑side broker setup, then let entities import. [Elektroda, p.kaczmarek2, post #21770001]

Why are my energy sensors missing in HA?

Turn on energy measurement in OpenBeken before running HA Discovery. If you discover first, HA won’t create those entities. Re‑run Discovery after enabling. [Elektroda, p.kaczmarek2, post #21770117]

What UART settings and pin do I use for debugging?

Connect to TX2 on the back of CB2S and log at 115200 baud. Capture boot messages to diagnose no‑AP or boot‑loop issues. [Elektroda, p.kaczmarek2, post #21767604]

Could my module be BK7231M even though the shell says CB2S?

Yes, rare units had BK7231M inside a CB2S chassis. Peel the sticker to confirm. Adjust approach if it isn’t BK7231N. [Elektroda, p.kaczmarek2, post #21767604]

What is OpenBeken in this context?

It’s the custom firmware you flash onto the CB2S to replace Tuya, then manage via its web panel, MQTT, and HA Discovery. [Elektroda, p.kaczmarek2, post #21769948]

How do I know the device really uses BK7231N?

The user confirmed BK7231N after inspection. Treat it as BK7231N unless your sticker check shows otherwise. [Elektroda, artin.bruyen, post #21769991]

I flashed successfully but current draw is near 0.01 A. What does that mean?

If it powers but draws very little and shows no AP, confirm 3.3V stability and read UART logs. Bad power can prevent Wi‑Fi startup. [Elektroda, artin.bruyen, post #21769855]

Where do I set MQTT credentials now that HA’s UI changed?

Use your HA MQTT broker’s username/password. Enter the same in OpenBeken. Discovery will proceed even if HA’s password view changed. [Elektroda, artin.bruyen, post #21770143]

How do I enable power saving and other quality‑of‑life features?

From the OBK web panel, enable PowerSave after stable operation and MQTT setup. Then consider SSDP and mobile app control if needed. [Elektroda, p.kaczmarek2, post #21769948]

What’s an edge case that can break bring‑up?

Low‑current 3.3V sources cause CB2S boot loops with no AP. Use a separate 3.3V LDO and retest after a power cycle. [Elektroda, p.kaczmarek2, post #21767604]

What Tuya dump detail is useful if I need to cross‑check?

Note that the Tuya partition in this device starts at byte offset 2,023,424. That can align templates and pin extraction. [Elektroda, artin.bruyen, post #21769936]

Can I follow older videos if HA’s interface looks different?

Yes. Focus on entering broker details in OBK and enabling Discovery. HA UI shifts, but MQTT basics and Discovery stay the same. [Elektroda, p.kaczmarek2, post #21770117]

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