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[BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral

ferbulous 807 4
  • This is a short teardown of Generic Tuya Wall Switch Push Button Type (No Neutral) with CB3S module.

    Basic information:
    Brand: Tuya
    Model: LSPS5
    Chip: BK7231N [CB3S]
    Local Vendor: https://www.aliexpress.com/item/1005003379628923.html
    There are other stores selling similar switches, the original store i bought from had increased their prices.

    Teardown Photos:

    [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral
    [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral




    Flashing Method:
    Using serial method with hid_download tool. Start flashing and do a power cycle or ground the CEN pin.
    UART TX --> PCB RX
    UART RX --> PCB RX
    UART GND --> PCB GND
    UART 3.3V --> PCB 3.3V

    [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral

    Pinout:

    1 Gang
    Pin Role
    P6 WIFILED_N
    P8 Relay 1
    P26 Btn 1


    2 Gang
    Pin Role
    P6 WIFILED_N
    p7 Relay 1
    p14 Btn 1
    p9 Relay 2
    p24 Btn 2


    3 Gang
    Pin Role
    P6 WIFILED_N
    P7 Relay 1
    P8 Relay 2
    P9 Relay 3
    P14 Btn 1
    P24 Btn 3
    P26 Btn 2

    Cool? Ranking DIY
    About Author
    ferbulous
    Level 13  
    Offline 
    ferbulous wrote 133 posts with rating 17, helped 0 times. Been with us since 2022 year.
  • #2
    caubergjef57
    Level 3  
    Hi, have a Smart Lite Wifi 3gang switch type DS-101. I flashing the BK7231N with version 1.15.38. Can somebody telling me how to configurated, try many but can't find the right configuration for the device. Any help are welcome.
  • #3
    p.kaczmarek2
    Level 28  
    DS-101? Someone has submitted such configuration some time ago:
    https://openbekeniot.github.io/webapp/devicesList.html
    [BK7231N - CB3S] Generic Tuya Wall Switch Push Button Type 1-3 Gang No Neutral
    but idk if it's correct.
    Also isn't it this device, in our not-yet-translated video?
    https://www.youtube.com/watch?v=JCqq-gn-X2c&ab_channel=elektroda.pl

    By the way, the no-neutral devices are also interesting from a technical standpoint. I've been drawing a schematic of such device once:
    https://www.elektroda.pl/rtvforum/topic3793509.html
  • #4
    ferbulous
    Level 13  
    caubergjef57 wrote:
    Hi, have a Smart Lite Wifi 3gang switch type DS-101. I flashing the BK7231N with version 1.15.38. Can somebody telling me how to configurated, try many but can't find the right configuration for the device. Any help are welcome.


    Can you share more pictures of the device pcb?
    When you said you can’t find the right configuration, what does it mean?
    Can you still toggle the relays or buttons
  • #5
    caubergjef57
    Level 3  
    ferbulous wrote:
    caubergjef57 wrote:
    Hi, have a Smart Lite Wifi 3gang switch type DS-101. I flashing the BK7231N with version 1.15.38. Can somebody telling me how to configurated, try many but can't find the right configuration for the device. Any help are welcome.


    Can you share more pictures of the device pcb?
    When you said you can’t find the right configuration, what does it mean?
    Can you still toggle the relays or buttons


    Hi, i changed the module with a esp 12F and flashing tasmota.
    Works great now.
    Any way thanks