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Alternative for WBSAB Voltage Regulator on USB Wi-Fi Smart Switch Board?

150219v8 186 4
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  • #1 21563053
    150219v8
    Level 2  
    Maybe a new device here.
    It's a USB Wi-Fi smart switch.

    Unfortunately, I accidentally destroyed the voltage regulator on the board, but the sub-module with the microprocessor and Wi-Fi still worked.
    This way, I was able to salvage the original firmware and the port configuration I had read.
    I was also able to successfully flash new firmware.
    Please see the port configuration in the image.

    The designation on the voltage regulator is WBSAB, which appears to be an internal designation.
    If anyone has any suggestions for an alternative voltage regulator, please let me know.

    {
    "vendor": "Tuya",
    "bDetailed": "0",
    "name": "Full Device Name Here",
    "model": "enter short model name here",
    "chip": "BK7231N",
    "board": "TODO",
    "flags": "1024",
    "keywords": [
    "TODO",
    "TODO",
    "TODO"
    ],
    "pins": {
    "6": "WifiLED_n;0",
    "7": "Rel;0",
    "8": "Btn;0",
    },
    }
    Instruction manual for a Wi-Fi USB/Type-C switch module with technical specifications and connection diagrams.
    Screenshot with device configuration showing pin assignments and BK7231N module indication.
    The image shows a Wi-Fi USB switch module set with user manual, switch module, and packaging labeled WF-USB Adaptor.
    Wi-Fi USB switch module with DC input/output and a button on the casing.
    Wi-Fi USB switch module in a white case, partially disassembled, showing USB ports and the device's interior.
    Four close-ups of different circuit boards with visible electronic components and technical markings.
    [img-0]
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  • #2 21563058
    p.kaczmarek2
    Moderator Smart Home
    Thx, but can you attach also a JSON template of the device? It's easier to copy JSON...
    Helpful post? Buy me a coffee.
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  • #4 21584752
    AquaMan2421
    Level 1  
    Love these switches, I found your post looking for info on WBSAB chip. I too have wrecked 2 of my WiFi switches, driving LED panels. I was hoping to find a fuse inside but no luck. How did you power your device to verify the data was still valid? My devices are unresponsive when I plugged them in, no blue or red lights, no devices show up over WiFi. Also I opened mine using a pair of pliers to gently distort the shell so I could get a pick in to separate the cover. I was pleasantly surprised to see it wasn’t glued together,
  • #5 21584770
    150219v8
    Level 2  
    I noticed something strange about these USB Wi-Fi switches. I successfully re-flashed two of them to OBK, but both were no longer accessible after the flashing. The chip in question was defective in both. I did everything as usual, and I wondered why the voltage IC broke after flashing. Since I couldn't find either this or a replacement, I desoldered it (U1) and replaced the power supply with an AMS 1117.
    Alternative for WBSAB Voltage Regulator on USB Wi-Fi Smart Switch Board?
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