Qiachip Smart Switch - BK7231N / CB2S - interior, programming

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#241 29 Dec 2022 12:14

p.kaczmarek2 p.kaczmarek2

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#241 29 Dec 2022 12:14

Thanks. I will add this to our templates list, but can you at least post a photo of MK601 switch and information where it was bought? And which module?
#242 29 Dec 2022 12:15

Lesnoi Lesnoi

Level 5

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#242 29 Dec 2022 12:15

spin55 wrote:
Hello. In my case the configuration of MK601 SMART SWICHT is:
P26 --> LEDs
P6 --> Relay
P7 --> Btn
P10--> Btn_n (S2)
regards

Thanks for the tip. pins RX, TX are P6, P7? on my board only these pins are connected. At the time of laying I usually wire)
#243 29 Dec 2022 12:18

p.kaczmarek2 p.kaczmarek2

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#243 29 Dec 2022 12:18

@alexander21041995 ouh I see you have that problematic board with WB2S that is hardly accessible. For that one, I'd suggest doing a full 2MB firmware read for the OTA hack, so further devices from this series can be flashed with OpenBeken remotely, without opening the case. Do anyone have a 2MB full flash dump of original Tuya software from that kind of switch?
#244 29 Dec 2022 12:34

Lesnoi Lesnoi

Level 5

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#244 29 Dec 2022 12:34

p.kaczmarek2 wrote:
@alexander21041995 ouh I see you have that problematic board with WB2S that is hardly accessible. For that one, I'd suggest doing a full 2MB firmware read for the OTA hack, so further devices from this series can be flashed with OpenBeken remotely, without opening the case. Do anyone have a 2MB full flash dump of original Tuya software from that kind of switch?

It seems that power saving helped from the reboot. I still don't understand how to control the relay. I'm not sure if I can use rx, tx as pins. Unfortunately I don't have stock firmware.
#245 29 Dec 2022 12:38

p.kaczmarek2 p.kaczmarek2

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#245 29 Dec 2022 12:38

This is very good to hear, that PowerSave helps. I will add it to our FAQ.

Can you provide more information about "don't understand how to control relay"?

I think you should be able to use RX/TX as pins in our software. You configure them as any other pins. Are you saying there is some kind of issue with them?
#246 29 Dec 2022 12:41

Lesnoi Lesnoi

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#246 29 Dec 2022 12:41

p.kaczmarek2 wrote:
This is very good to hear, that PowerSave helps. I will add it to our FAQ.

Can you provide more information about "don't understand how to control relay"?

I think you should be able to use RX/TX as pins in our software. You configure them as any other pins. Are you saying there is some kind of issue with them?

Ok, I'll solder the missing pins and try again. but it seems the circuit is P26 --> LEDs
P6 --> relay
P7 --> Btn
P10 --> Btn_n (S2) is not suitable for my board. i can use rx, tx, p24, p26.
#247 29 Dec 2022 12:43

p.kaczmarek2 p.kaczmarek2

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#247 29 Dec 2022 12:43

So give it a try and I will help you if there is some problem.

I will just already note - this is not "Btn_n", if you are trying to connect a normal two state switch, then you should use this role:

TglChanOnTgl, it toggles target channel on switch toggle, so you can use old, "classic" switch with smart module.

Of course, if you connect a momentary switch, then just indeed use Btn.
#248 29 Dec 2022 17:45

spin55 spin55

Level 14

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#248 29 Dec 2022 17:45

Mine has a CB2S board, although I replaced it with the equivalent TYWE2S because the operation was not stable.
regards

Added after 2 [hours] 9 [minutes]:

Pin 10 is RX1 and I use it to switch S2.
regards

Added after 11 [minutes]:

You have to short-circuit the P10 to ground for it to work. Or with S1 which is internally connected to ground. Be careful because in the double relay controllers for blinds these contacts usually go to the 230V phase. Careful with this.
#249 30 Dec 2022 06:59

Lesnoi Lesnoi

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#249 30 Dec 2022 06:59

I managed to get the device to work on such a config. But the button is not working properly. if you set p24--BTN the button reacts but starts randomly turning on and off. what could be the problem?
#250 30 Dec 2022 08:09

spin55 spin55

Level 14

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#250 30 Dec 2022 08:09

On P11 and P24 play around with the BTn and BTn_n settings and swap. You are close to getting it.
As the board is horizontal, it does not use pins 6,7 and 8, so they have had to take advantage of TXD1.
#251 30 Dec 2022 10:34

p.kaczmarek2 p.kaczmarek2

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#251 30 Dec 2022 10:34

spin55 wrote:
Mine has a CB2S board, although I replaced it with the equivalent TYWE2S because the operation was not stable.

In case of any power supply issues, add PowerSave command to "Short startup command" in Options! The cheapest power supplies might require low power mode on Beken in order not to overload.

Lesnoi wrote:

But the button is not working properly. if you set p24--BTN the button reacts but starts randomly turning on and off. what could be the problem?

That's strange - can you clarify what do you mean by "the button"? The small, microswitch on the device? Or the big switch that you connect to device contacts?
For the button on the device, use Btn/Btn_n, for the toggle switch connected to S* terminal, if it's two state, use "toggle channel on toggle"...
#252 30 Dec 2022 11:18

Lesnoi Lesnoi

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#252 30 Dec 2022 11:18

p.kaczmarek2 wrote:

Lesnoi wrote:

But the button is not working properly. if you set p24--BTN the button reacts but starts randomly turning on and off. what could be the problem?

That's strange - can you clarify what do you mean by "the button"? The small, microswitch on the device? Or the big switch that you connect to device contacts?
For the button on the device, use Btn/Btn_n, for the toggle switch connected to S* terminal, if it's two state, use "toggle channel on toggle"...

pins s1 and s2 work fine when p11 is set to "TglChanOnTgl" turns on the relay when closed and vice versa. if you set p24 "BTN" the button reaction device (micro button) but at the same time starts to turn on and off the relay involuntarily. similar to contact bounce
#253 30 Dec 2022 11:49

p.kaczmarek2 p.kaczmarek2

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#253 30 Dec 2022 11:49

Can you try Btn_n?
That's the first time I see this issue.
#254 30 Dec 2022 12:06

spin55 spin55

Level 14

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#254 30 Dec 2022 12:06

I don't think it's the power supply in my case because I feed the CB2S module directly with 3V3 and the instability continues. Back in the day I tried to update the firmware via OTA but it was still the same. It is currently working with a TYWE2S board with EspHome firmware and fully integrated into Home Assistant.
Back in the day I had a problem similar to Lesnoi's (I don't remember if it was with this device or another) and I solved it by playing with the Buttons and LED configurations.
regards
#255 30 Dec 2022 17:17

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home
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#255 30 Dec 2022 17:17

nemec23041990 wrote:
RX TX как указать?
драйвер DHT11/22, AM2301?
Quote:
чип UNICMICRO UM8005
http://www.gztrchip.com/uploadfile/file/20210811/1628649277678726.pdf
его можно прошить?

https://www.unicmicro.com/index.php/show-27-69.html
информация о прошивке.

DHT11, DHT22, DHT12, DHT21 support has been added on latest update and was tested in BK7231T and BL602.

Configuration: connect DHT11 to any pin. For that pin role, select DHT11. First linked channel is temperature, second is humidity. You can receive publishes with Home Assistant. You can scale values in HA because temperature is stored as times 10 value like in TuyaMCU. You could also just do on change handler with publishFloat and $CH2*0.1 expression, this will also work and that way you can set any topic
Here is a screenshot from out automatic tests for this feature:

Here is the command (to be put in autoexec.bat):
Code: text Expand Select all Copy to clipboard
addEventHandler OnChannelChange 20 publishFloat myAliasedVal $CH20*0.1
#256 13 Jan 2023 14:29

Lesnoi Lesnoi

Level 5

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#256 13 Jan 2023 14:29

p.kaczmarek2 wrote:
Can you try Btn_n?
That's the first time I see this issue.

i did some tests. Btn_n disables the button. I also read the reviews where I bought this module and many users encounter the problem of self-enable / disable on the stock firmware. I just don't use the standard button and the relay works fine. but there is a problem, if the wifi point disappears, then the device gets hot and starts to reboot cyclically. I don't know how to solve this problem. I'll try to test for a longer period with a stable access point. Thanks for your hard work!
#257 13 Jan 2023 15:09

p.kaczmarek2 p.kaczmarek2

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#257 13 Jan 2023 15:09

So that's a hardware problem that happens on stock firmware as well?

If device gets hot, you can try low power mode - PowerSave in a short startup command, but take care, it's experimental.
#258 13 Jan 2023 17:25

spin55 spin55

Level 14

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#258 13 Jan 2023 17:25

As I previously indicated, I replaced the CB2S board with a TWE2S. The plate that I removed the food directly with 3.3 volts and continues to give the same symptom as when it was installed: Very slow web page reloading and continuous disconnections. So I came to the conclusion that the board is bad. From what Lesnoi has said, it seems that these plates are defective from the factory.
Regards
#259 16 Jan 2023 11:06

Lesnoi Lesnoi

Level 5

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#259 16 Jan 2023 11:06

p.kaczmarek2 wrote:
So that's a hardware problem that happens on stock firmware as well?

If device gets hot, you can try low power mode - PowerSave in a short startup command, but take care, it's experimental.

PowerSave unfortunately does not work, I suggest putting a heatsink on the chip, I'll tell you about my experience later
#260 16 Feb 2023 13:39

nemec23041990 nemec23041990

Level 4

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#260 16 Feb 2023 13:39

приветствую, ds18b20 есть поддержка?
#261 16 Feb 2023 13:42

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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#261 16 Feb 2023 13:42

Hello @nemec23041990 , we have support for DHT sensors (DHT11, DHT22, etc), ds18b20 can be added if you want but it's not here right now
#262 27 Mar 2023 19:48

ginpachi98 ginpachi98

Level 1

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#262 27 Mar 2023 19:48

I'd also like DS18B20 support, its so small and easy to add, it'd be a shame not to have it
#263 16 Apr 2023 20:43

piratee piratee

Level 12

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#263 16 Apr 2023 20:43

Hello
I am trying to read the az BK7231N firmware and I get the message:
(on the chip is the inscription NU2)

Starting read!
Now is: niedziela, 16 kwietnia 2023 20:39:18.
Flasher mode: BK7231N
Going to open port: COM1.
Serial port open!
Getting bus... (now, please do reboot by CEN or by power off/on)
Getting bus success!
Going to set baud rate setting (921600)!
Will try to read device flash MID (for unprotect N):
failed with serial.BytesToRead 0 (expected 15)
The beginning of buffer in UART contains data.
Failed to read device MID!
Going to start reading at offset 0x00...
Reading 0x00... failed with serial.BytesToRead 0 (expected 4111)
The beginning of buffer in UART contains data.
Failed! There was no result to save.
#264 16 Apr 2023 21:54

p.kaczmarek2 p.kaczmarek2

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#264 16 Apr 2023 21:54

Please try desoldering the module first, just to be sure.
Please try hid_download_py:
https://github.com/OpenBekenIOT/hid_download_py
https://www.youtube.com/watch?v=PKkiqDNFIx8&t=295s&ab_channel=Elektrodacom

That fail at MID is worrying, I hope they didn't change the flashing method or the way chip identifies itself
#265 16 Apr 2023 21:57

piratee piratee

Level 12
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#265 16 Apr 2023 21:57

I bought 2 pcs. from different suppliers - tomorrow maybe I'll do it, desolder and try to program it

Attachments:

readResult_BK7231N_QIO_2023-18-4--10-07-17.bin Download (2 MB)
#266 19 Apr 2023 11:24

piratee piratee

Level 12
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#266 19 Apr 2023 11:24

Today I read the second switch after desoldering.

P8 - WiFiLED
P10 - Btn
P23- TglChanOnTgl
P26 - Rel
Regards

Attachments:

readResult_BK7231N_QIO_2023-19-4--08-09-50_inna obudowa.bin Download (2 MB)
#267 19 Apr 2023 15:36

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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#267 19 Apr 2023 15:36

Thanks for the backups. By the way, the flasher in the new version has the option of conveniently restoring the backup. https://github.com/openshwprojects/BK7231GUIFlashTool
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