FAQ
TL;DR: 150+ Tuya Wi-Fi products are flashable with Cloudcutter [“Tuya-Cloudcutter”, 2023]; “flash once, configure forever,” says p.kaczmarek2 [Elektroda, p.kaczmarek2, post #20466798] The CB2S switch runs a BK7231N SoC and accepts OpenBeken in roughly three minutes. Why it matters: Local firmware ends cloud dependence and boosts privacy.
Quick Facts
• Chipset: Beken BK7231N [Elektroda, giovannij600, post #20465634]
• Rated load: 16 A @ 250 VAC, 50/60 Hz [AliExpress Listing]
• Unit price: ≈ US $5 in 10-piece lots [AliExpress Listing]
• Flashing time: approx. 3 min with Cloudcutter [Elektroda, giovannij600, post #20465634]
• GPIO map: Relay GPIO8, LED GPIO7, Buttons GPIO10/26 [Elektroda, giovannij600, post #20465634]
What microcontroller is inside the Generic Wi-Fi Smart Switch?
The board uses a Beken BK7231N microcontroller module (CB2S) [Elektroda, giovannij600, post #20465634]
How do I flash OpenBeken using Tuya Cloudcutter?
- Run sudo ./tuya-cloudcutter.sh -p aubess-16a-mini-smart-switch -f OpenBK7231N_UG_1.15.517.bin. 2. Wait until Cloudcutter injects the payload. 3. Re-connect power; the device now hosts the OpenBeken AP [Elektroda, giovannij600, post #20465634]
Which GPIO pins control the relay, LED, and buttons?
Relay: GPIO8; Status LED (active-low): GPIO7; Push-button: GPIO10; S1/S2 header button: GPIO26 [Elektroda, giovannij600, post #20465634]
Why did S1 and S2 initially fail to work?
They were mapped to wrong roles; assigning GPIO26 as Button corrected the issue [Elektroda, giovannij600, post #20465807]
Where can I copy a ready JSON template?
Open the OpenBeken Web Application, click Launch, choose “Copy JSON,” then paste it into your forum post using syntax=json tags [Elektroda, p.kaczmarek2, post #20467175]
What are the electrical limits of the switch?
The listing specifies 16 A at up to 250 VAC, equal to 4 kW resistive load [AliExpress Listing].
Can I revert to the stock Tuya firmware?
Yes. Back up the original image during Cloudcutter; re-flash via UART if needed. Without a backup, restoration is impossible [“Tuya-Cloudcutter”, 2023].
What is a common edge-case after flashing?
Wrong pin roles can engage the relay permanently, heating the load and risking failure [Elektroda, p.kaczmarek2, post #20465815]
How many devices does Cloudcutter currently support?
The project lists more than 150 officially tested Tuya devices [“Tuya-Cloudcutter”, 2023].
Does OpenBeken work without internet?
Yes. After flashing, all control and MQTT functions operate locally; zero outbound connections are required [OpenBeken Docs, 2023].
What happens if power is lost during flashing?
An interrupted write can brick the bootloader; recovery then needs a 3.3 V UART and bkwriter tool [OpenBeken Docs, 2023].
Are there alternative modules for similar projects?
ESP8266-based ESP-01S or ESP8285-based TYWE3L offer similar Wi-Fi control but have lower RAM than BK7231N [Espressif Datasheet, 2022].
Comments
Thank you, can you provide the pins configuration for that device? [Read more]
I'm trying to find it, but using the configuration like this https://obrazki.elektroda.pl/5701076800_1677749837_thumb.jpg only relay work. S1 and S2 and push button not work [Read more]
Well, you have either to look at the board and check traces with multimeter to see where things are connected, or just try pin roles one by one... you can also search for similar devices on our template... [Read more]
I find it, I put it on post Thanks [Read more]
You can also copy JSON template from the Launch Web Application in obk firmware. [Read more]
Ok I get it, where I have to copy? [Read more]
Copy from Web Application and paste here in the post, make sure to use syntax = json tag here on the forum. [Read more]
Ok I put it on first post [Read more]
Hi, I just bought this but it goes offline afte 12hours. Doesn't matter if close do the router,2.4Ghz and no AP isolation. I want to tray to flash it. I need it as timer to turn on garden light 21:00... [Read more]
In OBK, you can enable NTP driver and use addClockEvent in autoexec.bat to script your smart switch to do given action at certain time. [Read more]
Ok, probably I miss a lot of knowledge about OBK. I used a couple of device with Tasmota and they have a web gui interface. You suggest to add something manually to autoexec.bat, so I think OBK is a... [Read more]
This may be ok, as long as you power WiFi module from external LDO, not from 3.3V pin on this board. [Read more]
Ops :) I miss that. I though I need to connect TX,RX,Gnd, 3,3v from my USB board to pins on the blue board shown in first post. [Read more]