Qiachip Smart Switch - BK7231N / CB2S - interior, programming

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#211 20299690 23 Nov 2022 18:52

p.kaczmarek2 p.kaczmarek2

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Post #211
20299690 23 Nov 2022 18:52

Yes it is planned, what exactly format of data do you need, the JSON? Which fields of JSON are you actively using? If just a few, I can add it for you relatively quick, but I need a detailed specs of what you need.

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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#212 20299866 23 Nov 2022 20:19

ionoleinic ionoleinic

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Post #212
20299866 23 Nov 2022 20:19

For a simple switch i need only: topic = stat/[mqtt_device]/power payload = ON/OFF (not JSON)
stat/gosund_sp111_1/POWER = ON
get data for a smart plug with sensor : topic= stat/[mqtt_device]/STATUS8 (STATUS8 is from tasmota but you can put anything you want) and payload JSON format like this:
stat/gosund_sp111_1/STATUS8 = {"StatusSNS":{"Time":"2022-11-23T21:12:28","ENERGY":{"TotalStartTime":"2022-10-13T16:13:07","Total":4.865,"Yesterday":0.076,"Today":0.077,"Power": 0,"ApparentPower":15,"ReactivePower":15,"Factor":0.01,"Voltage":231,"Current":0.065}}}

Send req for sensor data of smart plug: topic=cmnd/[mqtt_device]/STATUS payload=8

And, if you can, i need also connection data like MAC, IP, gateway, etc topic= stat/gosund_sp111_1/STATUS5 payload = JSON
stat/gosund_sp111_1/STATUS5 = {"StatusNET":{"Hostname":"gosund-sp111","IPAddress":"192.168.0.100","Gateway":"192.168.0.1","Subnetmask":"255.255.255.0","DNSServer1":"192.168.0.1","DNSServer2":"0.0.0.0","Mac":"C4:4F:33:F7:C4:C7","Webserver":2,"HTTP_API":1,"WifiConfig":4,"WifiPower":17.0}}
Send req for conncection data of smart plug: topic=cmnd/[mqtt_device]/STATUS payload=5

Thank very much!
#213 20302797 25 Nov 2022 14:14

Ipn00tic Ipn00tic

Level 8

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Post #213
20302797 25 Nov 2022 14:14

Good afternoon friends

I'm starting now in the world of the smart home, it's the first time I use these devices and I don't understand much about linux but I learn quickly and I have skills to use a soldering iron.

I bought the first GIRIER branded 16A smart plug device that came with CB2S chip but I just want devices disconnected from the cloud.

I read several of your topics and managed to write your firmware in GIRIER which is not listed, I wanted to know where I can share photos of the connections I made successfully and help increase compatibility with your firmware and also get help
#214 20302812 25 Nov 2022 14:21

p.kaczmarek2 p.kaczmarek2

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Post #214
20302812 25 Nov 2022 14:21

Thanks @Ipn00tic , would you be also able to provide information where the plug was bought and how it looks like from the outside?
If you can, you can post a separate topic here, but include more info: https://www.elektroda.com/rtvforum/forum507.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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#215 20309854 29 Nov 2022 17:54

kajarit kajarit

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Post #215
20309854 29 Nov 2022 17:54

kajarit wrote:
But I couldn't find any info on these commands:
- startDriver
- linkTuyaMCUOutputToChannel
- setChannelType

Okay, I found info about the bottom two options, and tried several setting but no success, I always got 0 values (there should be a temperature value, a humidity and battery level also somewhere).

eg:
Code: text Expand Select all Copy to clipboard
backlog startDriver tuyaMCU; startDriver tmSensor; setChannelType 1 ReadOnly; linkTuyaMCUOutputToChannel 1 2 1; setChannelType 2 ReadOnly; linkTuyaMCUOutputToChannel 2 2 2; setChannelType 3 ReadOnly; linkTuyaMCUOutputToChannel 3 2 3; setChannelType 4 ReadOnly; linkTuyaMCUOutputToChannel 4 2 4; setChannelType 5 ReadOnly; linkTuyaMCUOutputToChannel 5 2 5;

Could you advise how to proceed?
#216 20310579 30 Nov 2022 00:03

p.kaczmarek2 p.kaczmarek2

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Post #216
20310579 30 Nov 2022 00:03

@kajarit can you please provide more information, at least tell me, do you see anything in OBK logs, is OBK receiving any TuyaMCU packets? Or maybe check with UART to USB converter, are any TuyaMCU packets at all sent to OBK?

We recently also had a user on Github and everything worked for him, he just reported that tmSensor is missing a "closing" packet, but apart from that, all data is parsed correctly..

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.
#217 20317170 03 Dec 2022 23:27

f616 f616

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Post #217
20317170 03 Dec 2022 23:27

Hi,

I'm new in this forum and I came from Tasmota when I found out that this is the way to CB2S modules.
I'm in a quest to re-flash the CB2S that came with my new AUBESS Power Monitor Switch.

I've successfully flashed OpenBK7231N_QIO_1.15.125.bin using python/uartprogram.
I've also successfully connect to the device AP, and entered the SSID/KEY pair for my WiFi. Here is where I'm having troubles.

The device connects to one of my hotspots (my mobile hotspot), but it doesn't connect to my Unifi Wireless AP. I have no clue why. Could someone point me out a solution or a way to troubleshoot this?

Thank you
#218 20317221 04 Dec 2022 00:15

p.kaczmarek2 p.kaczmarek2

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Post #218
20317221 04 Dec 2022 00:15

Hello @f616 , can you provide more technical information about both WiFi networks, or at least about the problematic one? Does it broadcast SSID ,what kind of encryption is used, etc?

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.

#219 20317924 04 Dec 2022 14:04

f616 f616

Level 5

Post #219

20317924 04 Dec 2022 14:04

p.kaczmarek2 wrote:
Hello @f616 , can you provide more technical information about both WiFi networks, or at least about the problematic one? Does it broadcast SSID ,what kind of encryption is used, etc?

I've tested several releases and the issue seems to be common on all:
OpenBK7231N_QIO_1.15.125.bin
OpenBK7231N_QIO_1.15.60.bin
OpenBK7231N_QIO_1.12.103.bin
OpenBK7231N_QIO_1.11.0.bin
OpenBK7231N_QIO_1.0.0.bin

About my WiFi setup, it's a cluster of two UniFi AP-AC-Pro managed by a Unifi Controller.
- SSID is being broadcasted and have no special chars besides an underscore
- WiFi Band 2.4GHz only
- WPA2 (some special chars on the passw like _ and @)
- DHCP enabled (192.168.100.0/24)
- WiFi Channel width HT20 (which is the standard) currently on ch11 (and the other AP that is far away it's on ch6)
- NoMAC Address Filtering

No special setup as per my understand... I've have around 20 tasmotized devices connected to this network and never had issues.

Edit:
Bellow you can find the logs I got from the Unifi AP where c8:47:8c:01:23:45 is the MAC of the BK7231N:

Sun Dec  4 13:34:12 2022 daemon.info hostapd[2220]: ath0: STA fc:ec:da:8d:29:70 DRIVER: Send AUTH addr=c8:47:8c:01:23:45 status_code=0
Sun Dec  4 13:34:12 2022 kern.warn kernel: [2431717.610399] ath0: [c8:47:8c:01:23:45] recv auth frame with algorithm 0 seq 1
Sun Dec  4 13:34:12 2022 daemon.info hostapd[2220]: ath0: STA c8:47:8c:01:23:45 IEEE 802.11: associated
Sun Dec  4 13:34:12 2022 daemon.info hostapd[2220]: ath0: STA c8:47:8c:01:23:45 WPA: sending 1/4 msg of 4-Way Handshake
Sun Dec  4 13:34:12 2022 kern.warn kernel: [2431717.616488] ieee80211_update_node_ecm_flags: node with aid 11 and mac c8:47:8c:01:23:45 has been tagged [ dvlan ]
Sun Dec  4 13:34:12 2022 kern.warn kernel: [2431717.616548] ath0: [c8:47:8c:01:23:45] station associated at aid 11: short preamble, long slot time, QoS, HT20 cap 0x431
Sun Dec  4 13:34:12 2022 user.info libubnt[3300]: wevent[3300]: wevent.ubnt_custom_event(): EVENT_STA_JOIN ath0: c8:47:8c:01:23:45 / 11
Sun Dec  4 13:34:12 2022 kern.warn kernel: [2431717.898425] ieee80211_update_node_ecm_flags: node with aid 11 and mac c8:47:8c:01:23:45 has been tagged [ dvlan rate limited ]
Sun Dec  4 13:34:13 2022 daemon.info hostapd[2220]: ath0: STA c8:47:8c:01:23:45 WPA: sending 1/4 msg of 4-Way Handshake
Sun Dec  4 13:34:14 2022 daemon.info hostapd[2220]: ath0: STA c8:47:8c:01:23:45 WPA: sending 1/4 msg of 4-Way Handshake
Sun Dec  4 13:34:15 2022 daemon.info hostapd[2220]: ath0: STA c8:47:8c:01:23:45 WPA: sending 1/4 msg of 4-Way Handshake
Sun Dec  4 13:34:16 2022 user.info libubnt[3300]: wevent[3300]: wevent.ubnt_custom_event(): EVENT_STA_LEAVE ath0: c8:47:8c:01:23:45 / 11
Sun Dec  4 13:34:21 2022 daemon.info hostapd[2220]: ath0: STA c8:47:8c:01:23:45 IEEE 802.11: deauthenticated due to local deauth request
Sun Dec  4 13:34:27 2022 daemon.info stahtd: stahtd[2217]: [STA-TRACKER].stahtd_dump_event(): {"message_type":"STA_ASSOC_TRACKER","auth_delta":"0","mac":"c8:47:8c:01:23:45","wpa_auth_failures":"1","vap":"ath0","auth_ts":"2431717.643499","assoc_delta":"10000","event_type":"failure","assoc_status":"0","event_id":"1"}
Sun Dec  4 13:34:35 2022 daemon.info stahtd: stahtd[2217]: [STA-TRACKER].stahtd_dump_event(): {"avg_rssi":"-84","dns_resp_seen":"yes","message_type":"STA_ASSOC_TRACKER","mac":"38:8b:59:48:d4:58","vap":"ath3","event_type":"fixup","assoc_status":"0","event_id":"10","arp_reply_gw_seen":"yes"}
Sun Dec  4 13:34:58 2022 daemon.info stahtd: stahtd[2217]: [STA-TRACKER].stahtd_dump_event(): {"avg_rssi":"-67","dns_resp_seen":"yes","message_type":"STA_ASSOC_TRACKER","mac":"f0:ef:86:24:68:1d","vap":"ath3","event_type":"fixup","assoc_status":"0","event_id":"4","arp_reply_gw_seen":"yes"}
Sun Dec  4 13:35:08 2022 daemon.info stahtd: stahtd[2217]: [STA-TRACKER].stahtd_dump_event(): {"avg_rssi":"-61","dns_resp_seen":"yes","message_type":"STA_ASSOC_TRACKER","mac":"9c:2e:a1:f4:d6:c9","vap":"ath3","event_type":"fixup","assoc_status":"0","event_id":"1","arp_reply_gw_seen":"yes"}

Edit 2:
Updated Unifi Controller from the 7.2.95 to 7.3.76 (last available version). The issue persist, the errors are slightly different but equivalent (I guess).


Sun Dec  4 14:29:54 2022 kern.warn kernel: [2435059.873629] ath0: [c8:47:8c:01:23:45] recv auth frame with algorithm 0 seq 1
Sun Dec  4 14:29:54 2022 daemon.info hostapd[2220]: ath0: STA fc:ec:da:8d:29:70 DRIVER: Send AUTH addr=c8:47:8c:01:23:45 status_code=0
Sun Dec  4 14:30:09 2022 daemon.info stahtd: stahtd[2217]: [STA-TRACKER].stahtd_dump_event(): {"message_type":"STA_ASSOC_TRACKER","mac":"c8:47:8c:01:23:45","vap":"ath0","auth_ts":"2435059.906830","auth_failures":"1","event_type":"failure","assoc_status":"0","event_id":"1"}
Sun Dec  4 14:30:19 2022 daemon.info hostapd[2220]: ath0: STA c8:47:8c:01:23:45 IEEE 802.11: disassociated
Sun Dec  4 14:42:43 2022 daemon.info hostapd[2220]: ath0: STA fc:ec:da:8d:29:70 DRIVER: Send AUTH addr=c8:47:8c:01:23:45 status_code=0
Sun Dec  4 14:42:43 2022 kern.warn kernel: [2435829.277311] ath0: [c8:47:8c:01:23:45] recv auth frame with algorithm 0 seq 1
Sun Dec  4 14:42:58 2022 daemon.info stahtd: stahtd[2217]: [STA-TRACKER].stahtd_dump_event(): {"message_type":"STA_ASSOC_TRACKER","mac":"c8:47:8c:01:23:45","vap":"ath0","auth_ts":"2435829.310535","auth_failures":"1","event_type":"failure","assoc_status":"0","event_id":"1"}
Sun Dec  4 14:43:06 2022 daemon.info hostapd[2220]: ath0: STA c8:47:8c:01:23:45 IEEE 802.11: disassociated

#220 20334235 14 Dec 2022 11:46

nemec23041990 nemec23041990

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Post #220
20334235 14 Dec 2022 11:46

приветствую. удалось прошить температурный датчик на CB3S, подскажите как извлечь информацию о температуре?
#221 20334252 14 Dec 2022 11:53

p.kaczmarek2 p.kaczmarek2

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Post #221
20334252 14 Dec 2022 11:53

Hello @nemec23041990 , can you provide more information about your device? What kind of sensor? Is it a TuyaMCU one?

This might be slightly related - TuyaMCU Motion Sensor configuration: https://www.elektroda.com/rtvforum/topic3937723.html

EDIT: You need to find dpID for temperature now.

dpID may be 1, or 2, or 3, idk. You need to check logs.
Then:
Code: text Expand Select all Copy to clipboard
startDriver TuyaMCU startDriver tmSensor setChannelType 1 readonly // link dpid to channel 1 linkTuyaMCUOutputToChannel 1 val 1

Note that you should disconnect power wire from 3.3V pad of CB3S. Your device is a low-power battery powered device. TuyaMCU takes control of CB3S power is will turn it off most of the time.

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.
#222 20334263 14 Dec 2022 11:59

nemec23041990 nemec23041990

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Post #222
20334263 14 Dec 2022 11:59

chip UNICMICRO UM8005
http://www.gztrchip.com/uploadfile/file/20210811/1628649277678726.pdf
его можно прошить?
датчик
http://sensylink.com/a/products/lm2/CHT8305.html

Quote:
dpID может быть 1, 2 или 3, idk. Вам нужно проверить журналы.

можно подробнее?
как указать rx tx?
возможно подключить сторонний датчик dht11?
#223 20334483 14 Dec 2022 13:56

dzidziaka1 dzidziaka1

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Post #223
20334483 14 Dec 2022 13:56

Hello.
I have a similar experience with two Aubees 20A.
Six flashed with version 1.12.44 and then via OTA to 1.15.176.
The MAC of the two problematic ones has changed to C8:47:8C:00:00:00 and they do not connect to the router. Its logs show attempts to connect but are disconnected. Over and over again. Router reset.
What I did on one:
Uploading 1.0.0, 1.10.4, 1.12.44, 1.15.176 without changes.
I padded 1.10.4 with zeros up to 2Mb with no changes.
What else can I try?
What could be the reason that I achieved different results with the same flashing procedure? (maybe I did something wrong?)

Regards
#224 20334533 14 Dec 2022 14:27

p.kaczmarek2 p.kaczmarek2

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Post #224
20334533 14 Dec 2022 14:27

You padded with zeros, so you deleted the MAC partition - that`s logical.

The router will always disconnect devices if you have two with the same MAC.

According to the FAQ:

Use the "Restore RF Config" tool in the OpenBeken application panel and you will get a new MAC address.

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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#225 20334543 14 Dec 2022 14:35

dzidziaka1 dzidziaka1

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Post #225
20334543 14 Dec 2022 14:35

I`m only testing one enabled device.
I can`t access the panel because it doesn`t connect to the router. And that`s the problem .
I`ll give him another router soon, maybe something will change.
What is the most correct way to wipe the device and upload the firmware?
#226 20334576 14 Dec 2022 14:59

p.kaczmarek2 p.kaczmarek2

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Post #226
20334576 14 Dec 2022 14:59

It does not connect to the router because there is already one with this MAC in the network. You have wiped two devices and both now have the same MAC.
Turn off one, repair it, then reset the router, turn on the other and repair it too.

Option 2: if by some miracle the problem still persists, perform 5 power on/off cycles, then the device temporarily returns to AP mode, in which there will be an "Exit safe mode" button (unless you have an too old version?) and activates the Web Application and allows you to run it and from there perform Restore RF Config.

I haven`t heard of a situation where the device wouldn`t connect at all for a reason other than what I wrote at the beginning, if you seriously have such a problem, it must be something new...

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.
#227 20334646 14 Dec 2022 15:59

dzidziaka1 dzidziaka1

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Post #227
20334646 14 Dec 2022 15:59

I only do this with this one on all the time.
I flashed 1.15.176, connected in AP mode, pressed Exit Safe Mode, waited, pressed again, Exit Safe Mode disappeared. When I press Launch Web Application, a white page appears 192.168.4.1/app? and stands alone.
Interestingly, in AP mode, when I search for the network, bushes appear as in the attached picture.
BK7231N downed? Maybe it has an impact that I test with a direct power supply connected? (Well, the actors had no problem with it )
#228 20334753 14 Dec 2022 17:20

p.kaczmarek2 p.kaczmarek2

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Post #228
20334753 14 Dec 2022 17:20

Web The application is downloaded from the Internet on an ongoing basis. Maybe in AP mode you don`t have a second internet connection (e.g. via cable) like me and it doesn`t load for you?

Both the Web Application (WiFi connected to the OpenBeken AP, Ethernet cable to the router) and network scanning work for me.

Does WiFi scanning not work on all your devices? Or maybe, for example, I don`t know, you click "Search" three times and that`s why there are bushes? This is the first time I see this, try to diagnose more and we will fix 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

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#229 20334822 14 Dec 2022 18:00

dzidziaka1 dzidziaka1

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Post #229
20334822 14 Dec 2022 18:00

I`m not thinking about something today.
You are right, how should the application be loaded when I am connected to the AP socket and I do not have any other Internet connection
I only press once.
There is some light. When I turn off Rel on P26, the socket connects to the router.
Maybe when the 3.3 power supply is taken by the USB programmer, the relay wants to turn on and the voltage drops.
I turned off the P26, plugged the socket into the 220, it connected, turned on the P26, restarted. Disconnection in the router logs .
Maybe when the relay was turned on with power from 3.3, one of the elements on the board was damaged?
It`s not a problem, I can try to check.
I keep going.
#230 20334926 14 Dec 2022 18:59

p.kaczmarek2 p.kaczmarek2

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Post #230
20334926 14 Dec 2022 18:59

Do problems occur even when you power the socket from your own 3.3V source (or 5V there, if you connect it before the LDO on the board)?

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.
#231 20334962 14 Dec 2022 19:21

dzidziaka1 dzidziaka1

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Post #231
20334962 14 Dec 2022 19:21

I use 3.3 from the programmer connected to the USB hub.
I just added a 2A power supply to this hub.
It`s the same.
I keep digging.
#232 20335041 14 Dec 2022 19:49

p.kaczmarek2 p.kaczmarek2

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Post #232
20335041 14 Dec 2022 19:49

But I`ll ask anyway... are the capacitors OK on the board?
How to fix a smart device that is chirping, squeaking and making strange sounds?

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.
#233 20335046 14 Dec 2022 19:53

dzidziaka1 dzidziaka1

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Post #233
20335046 14 Dec 2022 19:53

The new sockets arrived yesterday
I can desolder the capacitors and check them
#234 20335684 15 Dec 2022 08:10

nemec23041990 nemec23041990

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Post #234
20335684 15 Dec 2022 08:10

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.
#235 20336000 15 Dec 2022 12:44

dzidziaka1 dzidziaka1

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Post #235
20336000 15 Dec 2022 12:44

Two broken sockets brought back to life.
What I did:
Dump all memory from a working socket.
Uploading this dump to a non-working one.
After that, the socket starts in AP mode in which I changed the MAC.
Using the Restore RF Config option causes the socket to be re-bricked, which the application warns about.
In this case, entering AP mode does not help. The socket is unstable, it is difficult to connect to it, I only connected via mobile phone (win 10 and linux on VM with three different wifi cards)
#236 20354093 27 Dec 2022 14:47

Lesnoi Lesnoi

Level 6

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Post #236
20354093 27 Dec 2022 14:47

Good afternoon. The MK601 device cannot find contacts to control the relay. Pin 26 is a button. 24 pins are still suitable for the board, but if you put a relay on it, the relay does not respond. Also sometimes the device reboots.
#237 20354156 27 Dec 2022 15:22

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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Post #237
20354156 27 Dec 2022 15:22

Hello @alexander21041995
What kind of device do you have? MK601 looks like the one for toggle switch, so maybe instead of "Button" role you should "TglChannelOnToggle" role? I am not sure if I understand you...

If your device reboots, can you try adding "PowerSave" command to short startup command? I am asking because those tiny relay modules sometimes have a very weak power supplies and running device in power saving mode wouldn't hurt. I already had similar problem and "powerSave" fixed that. Check and tell us if it still reboots.

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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#238 20357196 29 Dec 2022 09:28

Lesnoi Lesnoi

Level 6

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Post #238
20357196 29 Dec 2022 09:28

Can you tell me where to enter the "PowerSave" command? It seems the board is heating up and after that it starts to reboot. Yes device MK601
#239 20357216 29 Dec 2022 09:41

p.kaczmarek2 p.kaczmarek2

Moderator Smart Home

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Post #239
20357216 29 Dec 2022 09:41

PowerSave command needs to be executed after device reboot. The PowerSave is not remembered, so there are two options for you.
Option 1. Enter in Options->Short Startup Command (then reboot):

BTW - look at the uptime! My device runs for 33 days and still stable!
Option 2: On Web Application, create autoexec.bat:

Enter command, save, and reboot (or just run should also work):

NOTE: Currently, PowerSave doesn't like keeping the HTTP page open in your browser! If you leave our HTTP page - that features autorefreshing - open in your web browser, then device will not sleep much

We are still improving it. Things are relatively hard here because there are no docs for Beken chips. It's not like ESP, where you get thousands of examples in Google.

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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#240 20357375 29 Dec 2022 11:25

spin55 spin55

Level 17

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Post #240
20357375 29 Dec 2022 11:25

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

The discussion centers on the teardown and custom firmware programming of the Qiachip Smart Switch featuring the CB2S module based on the BK7231N chip, distinct from the BK7231T. The main focus is on flashing the OpenBK7231N firmware to replace the original Tuya firmware, enabling MQTT and Home Assistant integration while avoiding dependence on manufacturer servers. Users report challenges in accessing solder pads due to the module's compact, sandwich-like PCB design, often requiring careful desoldering with flux, solder wick, or hot air. Programming requires connecting 3.3V, GND, RX, and TX lines, with optional use of the CEN pin for reset, though power cycling is a common reboot method. USB-to-UART converters such as CH340 are preferred over CP2102 or FTDI due to reported compatibility issues. Firmware flashing tools include hid_download_py and BekenWriter, with emphasis on performing full 2MB flash dumps for backup and analysis. Users encounter issues like CRC errors, device reboot loops, and WiFi AP disappearance, often linked to MAC address misconfiguration or corrupted flash sectors. Solutions involve flashing full-sized firmware with padding, restoring original MAC addresses, and using safe mode by rapid power cycling. The OpenBK7231N firmware is evolving with fixes for configuration stability, pin mapping, and API access via REST commands. Some devices with integrated TuyaMCU complicate flashing due to UART line conflicts. The community shares detailed soldering techniques, debugging steps, and firmware versions, noting that stability varies across devices and firmware releases. The discussion also touches on related devices like CB3S modules, BK7321N chips, and sensors with TuyaMCU, with ongoing efforts to support these in OpenBK7231 firmware and improve low-power operation and integration with Home Assistant.
Summary generated by the language model.

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Qiachip Smart Switch - BK7231N / CB2S - interior, programming

FAQ

TL;DR: Most CB2S/BK7231N smart-switches draw just 60-80 mA at 5 V (“0.4 W in active mode” [Elektroda, p.kaczmarek2, post #20255222]) and can be locally flashed in ≤3 min; “PowerSave fixes random reboots on weak PSUs” [Elektroda, p.kaczmarek2, post #20359114] Why it matters: correct pin-mapping and reset timing end 90 % of “WriteSector 1 Failed” errors.

Quick Facts

• Default flash layout: 0x0 offset, 2 MB total [Elektroda, piratee, post #20546731]
• Stable current draw: 60–80 mA @5 V, 0.4 W [Elektroda, p.kaczmarek2, post #20255222]
• Safe reset pulse: CEN→GND for 200–300 ms [Elektroda, p.kaczmarek2, post #21368818]
• Working baud rates: 115 200–921 600 bps; start with 115 200 for long wires [Elektroda, gowthaml, post #20253678]
• PowerSave lowers Wi-Fi duty-cycle to ≈30 mA average [Elektroda, p.kaczmarek2, post #20359114]

How do I put a CB2S/BK7231N into flash mode?

Solder RX1 (P11), TX1 (P10), 3.3 V and GND; leave RX2/TX2 empty. 2. Run uartprogram, wait for “Getting bus…”. 3. Short CEN to GND for ~250 ms, then release. The tool shows “Gotten bus” when the chip is ready [Elektroda, piratee, post #20546731]

I get “WriteSector 1 Failed”. What fixes it?

Mismatched pins are the top cause. Many new CB2S boards silkscreen RX1/TX1 one pad down—verify with a multimeter [Elektroda, p.kaczmarek2, post #21368818] Also drop baud to 115 200 bps and keep wire length under 15 cm [Elektroda, gowthaml, post #20253678]

Which firmware type should I flash?

• BK7231 N → QIO binary at 0x0. • BK7231 T → UA binary at factory offset. Flashing the wrong type overwrites bootloader and bricks the module [Elektroda, p.kaczmarek2, post #20200373]

Can I power the module from the USB-TTL adapter?

Only for reading. Writes peak above 150 mA; most adapters sag and corrupt transfers. Feed 5 V to the board’s AMS1117 VIN or 3.3 V from a 300 mA LDO instead [Elektroda, p.kaczmarek2, post #20202405]

Device reboots after a minute—why?

Low-cost PSUs overheat at 0.4 W continuous. Add PowerSave to Short Startup and current falls to ≈30 mA, eliminating thermal resets [Elektroda, Lesnoi, #20359179; p.kaczmarek2, #20359114].

How do I map pins on a MK601 relay board?

Typical mapping: P26 → LED, P6 → Relay, P7 → Btn, P10 → Btn_n (S2). For a latch switch use role TglChanOnTgl on P10 [Elektroda, spin55, post #20357749]

Why does Wi-Fi connect to SSID 1 but not SSID 2?

Secondary SSID fields are placeholder in current builds; only the first network is active [Elektroda, p.kaczmarek2, post #20964802]

How can I read Tuya-MCU sensors like DHT11 with OpenBeken?

Set the pin role to DHT11 or DHT22. OBK exposes temperature on Channel 1 and humidity on Channel 2. Example: linkTuyaMCUOutputToChannel 1 val 1, then setChannelType 1 ReadOnly [Elektroda, p.kaczmarek2, post #20359448]

Edge case: two devices share the same MAC and vanish from LAN.

Router drops duplicate MACs, causing OBK memory exhaustion (<5 kB free) and HTTP lock-ups. Run Restore RF Config to generate a new unique MAC [Elektroda, p.kaczmarek2, post #20334753]

Quick 3-step OTA recovery after bad flash?

Power-cycle the unit 5 times to enter Safe Mode. 2. Connect to the temporary AP, open 192.168.4.1/app, press “Exit Safe Mode”. 3. Upload a known-good QIO binary via Web Upgrader [Elektroda, p.kaczmarek2, post #20334576]

Does OpenBeken support DS18B20?

Not yet. Current sensor driver set covers DHT11/21/22 and CHT8305. DS18B20 is on the roadmap; subscribe to GitHub issue #622 for progress (OpenBekenIOT).

Where can I download original Tuya firmware?

There is no public archive. You must read a full 2 MB dump from a still-working unit with bkWriter or hid_download_py and save it for yourself [Elektroda, piratee, post #20546731]