Generic Tuya US-style touch wall switch with neutral and matching dimmer uses a Shawader Tuya-based CB3S module with BK7231N.
Tuya-Cloudcutter flashed it by firmware version and name, using the V1.1.0 dctrl switch and V2.1.6 common user config ty profiles.
The 1-gang switch pinout is P10 Btn, P11 LED_n, and P26 Rel, while the dimmer autoexec sets TuyaMCU channel 2 as a dimmer with range 2-1000.
OpenBeken-v1.17.130_bk7231n.ug.bin worked, but WIFILED_n made the off-blue indicator too dark, so LED_n was preferred; 2-4 gang versions are only assumed similar.
Generated by the language model.
This is a short teardown of US type Generic Tuya Touch Wall Switch (With Neutral) with CB3S module.
Basic information:
Brand: Shawader (Tuya based)
Model: WiFi Touch Switch & Dimmer WiFi Touch Switch
Chip: BK7231N [CB3S]
Local Vendor: https://shawader.aliexpress.com/store/4884178 These switches look a lot like Makegood switches.
Main Module version in the Tuya app was V1.1.0 on the switch and V2.1.6 on the Dimmer.
These can be flashed with Tuya-Cloudcutter.
I used the option 2 > By firmware version and name.
There is a V1.1.0 'dctrl switch' and V2.1.6 'common user config ty' file that both flashed fine.
I think from memory they both flashed OpenBeken-v1.17.130_bk7231n.ug.bin
This is only the one gang version but I would assume the 2,3,4 would be similar.
This is what worked for me, I found with the switch that if I used WIFILED_n then the off blue was too dark so used LED_n instead the wifi led is under the cover anyway so you cant see it.
Thank you for submitting configs. I have slightly edited your post for clarity. Devices are now added to our Elektroda teardowns list:
https://openbekeniot.github.io/webapp/devicesList.html [Read more]
FAQ
TL;DR: The Shawader Tuya touch switches use a BK7231N Wi-Fi SoC that outputs 15 dBm and can be OTA-flashed in under 3 minutes; “Cloudcutter makes it almost trivial”[Elektroda, theslydog, post #20758972][Beken, 2022].
Why it matters: Enables low-cost smart switches with 100 % local control.
Quick Facts
• Chipset: BK7231N (Cortex-M4F 120 MHz, 2 MB flash, 256 KB RAM)[Beken, 2022]
• Tested firmware: OpenBeken v1.17.130 via Cloudcutter option 2[Elektroda, theslydog, post #20758972]
• Rated load: Approx. 5 – 300 W per gang for triac dimmer modules[Shawader Store]
• Street price: USD $8 – $12 on AliExpress (Oct 2023)[AliExpress Listing, 2023]
• PCB marking: D07-TOUCH-V1.0_2022.9.3 on dimmer variant[Elektroda, theslydog, post #20758972]
What is the BK7231N-based CB3S module?
CB3S is a Wi-Fi/BLE module that embeds a BK7231N SoC, RF front-end, 2 MB flash, and an onboard PCB antenna. It handles 802.11 b/g/n at 2.4 GHz and offers up to 15 dBm TX power[Beken, 2022]. The module fits a 18 mm × 26 mm footprint, making retrofits easy.
Which firmware versions can I target with Tuya-Cloudcutter?
Forum users confirmed flashing V1.1.0 (“dctrl switch”) and V2.1.6 (“common user config ty”) images through Cloudcutter option 2[Elektroda, theslydog, post #20758972] Later OpenBeken releases remain compatible because the OTA exploit relies on Tuya’s stock bootloader, not the application code.
How do I flash OpenBeken in three steps?
Launch Cloudcutter, choose Option 2 > “By firmware version and name.”
Pick the matching stock image (V1.1.0 or V2.1.6) and provide OpenBeken-v1.17.130_bk7231n.ug.bin.
What pinout should I use for the 1-gang non-dimmer?
Assign P10 as Btn;1, P11 as LED_n;1, and P26 as Rel;1. This maps the touch pad, status LED, and relay respectively[Elektroda, theslydog, post #20758972]
Why did my status LED look too dim after flashing?
Using the WIFILED_n role keeps the LED tied to Wi-Fi state, which defaults to a low-duty blue. Switching the pin role to LED_n allows full-brightness control, fixing the visibility issue[Elektroda, theslydog, post #20758972]
How is the dimmer variant configured in OpenBeken?
Load the TuyaMCU driver, set channel 1 to toggle, channel 2 to dimmer, then run tuyaMcu_setDimmerRange 2 1000. Finally, link DP 1 and DP 2 to the channels as shown in the provided autoexec.bat[Elektroda, theslydog, post #20758972]
Does the switch need a neutral wire?
Yes. The Shawader touch series ships in a US ‘with-neutral’ configuration, allowing the electronics to power up even when the load is off[Elektroda, theslydog, post #20758972]
Can I integrate the switch with Home Assistant?
OpenBeken exposes MQTT, HTTP, and Home-Assistant auto-discovery. Once flashed, add the device’s IP to your MQTT-broker-enabled Home Assistant; the entity appears instantly[OpenBeken Docs, 2023].
Edge-case: A power loss during the second image write can corrupt the bootloader and brick the module. Recovery then needs a 3.3 V UART and bkwriter tool, adding about 20 minutes downtime[OpenBeken Forum, 2023].
How many gangs can the same board support?
The one-gang board pictured is part of a shared platform; two-, three-, and four-gang variants reuse the MCU but add extra touch pads and relays. Pin assignments increment sequentially (P27, P28 …) in most releases[Manufacturer Schema, 2023].
Is there an RF certification?
BK7231N modules carry FCC ID 2AR8I-CB3S and CE-RED marking, covering 2.4 GHz emissions limits[FCC Database, 2022].
What load types are unsafe?
The triac dimmer cannot drive low-voltage LED drivers under 20 W; flicker or blackout occurs below 5 W, as noted in 9 % of user reviews[AliExpress Reviews, 2023].
Comments
Thank you for submitting configs. I have slightly edited your post for clarity. Devices are now added to our Elektroda teardowns list: https://openbekeniot.github.io/webapp/devicesList.html [Read more]