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Tuya T2-U module first impressions: flashing firmware and OpenBeken (obk) testing

DeDaMrAz 1482 9
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  • #1 21626467
    DeDaMrAz
    Level 23  
    Posts: 621
    Help: 34
    Rate: 130
    I got T2-U module on hand

    Close-up of T2-U electronic module with T2 GU3433F0 microchip in center

    Will try more with it soon
    W pełni konfigurowalna automatyzacja domu - prezentacja Fox Wi-Fi Quad Input [sponsorowany]
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  • #2 21626473
    p.kaczmarek2
    Moderator Smart Home  
    Posts: 14795
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    T2 is BK7231N I think?
    Helpful post? Buy me a coffee.
  • #3 21626478
    divadiow
    Level 38  
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    insmod wrote:
    T1 - BK7238
    T2 - BK7231N
    T3 - BK7236
    T5 - BK7258
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  • BK7231N module confirmed in Tuya T2-U

    #4 21626485
    DeDaMrAz
    Level 23  
    Posts: 621
    Help: 34
    Rate: 130
    Screenshot from PuTTY terminal showing TUYA module initialization logs

    N module confirmed

    Quote:
    V:BK7231N_1.0.1
    REG:cpsr spsr r13 r14
    SVC:000000D3 00401C1C 000033AC
    IRQ:000000d2 00000010 00401e0c bf7e798f
    FIR:000000d1 00000010 00401ffc ffff7ff7
    SYS:000000df 0040192c 00000158
    ST:00000000
    J 0x10000
    bk_misc_init_start_type 0 0
    prvHeapInit-start addr:0x411fa0, size:122976
    [Flash]id:0xeb6015


    links to more found modules:

    T3-3S - https://www.aliexpress.com/item/1005007852415955.html
    T3-U - https://www.aliexpress.com/item/1005007852541322.html

    looking for more now...
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  • #5 21626487
    divadiow
    Level 38  
    Posts: 5236
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    Rate: 920
    old N SDK too, not even T2.

    ZIP files t2_1.4.0 and t2_1.5.0 with found_t2.log file shown in folder view
  • #6 21626495
    p.kaczmarek2
    Moderator Smart Home  
    Posts: 14795
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    Check GPIO, and make detailed photos of this board. Check if P16 (SPI output) is routed out - can it driver WS2812 easily? Once testing complete, I will make a detailed board article and devices list entry.
    Helpful post? Buy me a coffee.
  • #7 21626509
    DeDaMrAz
    Level 23  
    Posts: 621
    Help: 34
    Rate: 130
    https://www.aliexpress.com/item/1005009633496150.html

    https://developer.tuya.com/en/docs/iot-device...T5-E1-IPEX-development-board?id=Ke9xehig1cabj

    Tuya T5-E1 module as well, strange specs though

    Quote:
    Built-in with Tuya’s custom T5QN88 chip, Armv8-M Star (M33F) processor, with clock frequency of up to 480 MHz
    8 MB Flash
    16 MB PSRAM
    640 KB Share SRAM
    64 KB ROM
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  • #9 21626539
    p.kaczmarek2
    Moderator Smart Home  
    Posts: 14795
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    PSRAM is external RAM, like on ESP32. Nice! I wonder if SDK supports it?

    It's a shame they insist on internal Flash instead of external chip like with ESP8266...
    Helpful post? Buy me a coffee.

  • OpenBeken flashing on Tuya T2-U via download mode

    #10 21632536
    divadiow
    Level 38  
    Posts: 5236
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    Rate: 920
    not had to toggle a dip switch for a long time
    https://developer.tuya.com/en/docs/iot/t2-u-b...mv#title-6-Connection%20for%20DOWNLOAD%20mode

    TUYA BK7231N module with DIP switches, buttons, and status LEDs
    Tuya T2 Development Board V1.0.0 with green LEDs and USB cable connected

    https://github.com/openshwprojects/FlashDumps...mits/0acc699b5b8e1695dde588e57d748030d1dacf70

    CH342 / 2 COM ports

    Two CH342 COM ports shown as COM4 and COM47 in Device Manager.

    Code: Text
    Log in, to see the code
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Topic summary

LABEL_AI_GENERATED
Discussion centers on first impressions and identification of a Tuya T2-U module, with clarification that the T2 family uses BK7231N rather than BK7238/BK7236/BK7258. The module is confirmed as an N-series board, with additional references to related Tuya modules T3-3S, T3-U, and T5-E1. Later testing shows the board uses a BK7231N_1.0.1 firmware image, includes a CH342 USB interface with two COM ports, and can be put into download mode via a DIP switch. Flash dump work is referenced through an OpenShwProjects FlashDumps pull request, and serial boot logs confirm Tuya startup on the BK7231N platform. GPIO routing and possible P16/SPI output availability are mentioned as next steps for OpenBeken testing and board documentation.
AI summary based on the discussion. May contain errors.
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