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[BK7231T] Prosto WFU-08PM Smartplug with BL0937 Energy Monitoring

lukabodroza 210 9
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  • Helpful post
    #1 21583711
    lukabodroza
    Level 3  
    Hey there!

    First time posting something over here -- let alone adding a new device.

    The device is a Prosto WFU-08PM Smartplug with Energy Monitoring.

    I wasn't able to open it up but because it's glued down. Although I did manage to use Tuya Cloudcutter. It was using MCU 1.3.5 and is based on the BK7231T chip. After messing around in the config panel, it turned out the smartplug uses the BL0937 chip for power monitoring.

    Code: text Expand Select all Copy to clipboard
    
{
  "vendor": "Prosto",
  "bDetailed": "0",
  "name": "Prosto WFU-08PM Smartplug with Energy Monitoring",
  "model": "WFU-08PM",
  "chip": "BK7231T",
  "board": "TODO",
  "flags": "1024",
  "keywords": [
    "TODO",
    "TODO",
    "TODO"
  ],
  "pins": {
    "1": "Btn;1",
    "6": "WifiLED;0",
    "7": "BL0937CF;2",
    "8": "BL0937CF1;2",
    "10": "LED_n;1",
    "11": "Btn;1",
    "24": "BL0937SEL;2",
    "26": "Rel;1"
  },
  "command": "",
  "image": "https://obrazki.elektroda.pl/YOUR_IMAGE.jpg",
  "wiki": "https://www.elektroda.com/rtvforum/topic_YOUR_TOPIC.html"
}



    [BK7231T] Prosto WFU-08PM Smartplug with BL0937 Energy Monitoring
    AI: Hey, could you clarify what exactly you need help with regarding the Prosto WFU-08PM Smartplug? Are you looking to flash custom firmware, configure energy monitoring, or something else?
    Nothing, I created the power plug configuration, I'm just sharing it.
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  • #2 21584242
    p.kaczmarek2
    Moderator Smart Home  
    Nice, just don't forget to add "PowerSave 1" to startup. This will reduce power supply wear and heating. It should work good with BL0937 since the recent update.
    Helpful post? Buy me a coffee.
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  • #3 21584310
    lukabodroza
    Level 3  
    >>21584242

    Doesn't seem like it changed anything. The temperature is still around 60C. Still -- thanks!
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  • #5 21584474
    lukabodroza
    Level 3  
    Looks like I've accidentally kept a button during debugging. I saw that other plugs in the file don't have feature flags set so I've updated the JSON based on the commit you've shown.

    Here's the update:
    Code: text Expand Select all Copy to clipboard
    {
  "vendor": "Prosto",
  "bDetailed": "0",
  "name": "16A 3680W Smart Plug with Energy Monitoring (EU)",
  "model": "WFU-08PM",
  "chip": "BK7231T",
  "board": "",
  "keywords": [
    "socket",
    "tuya"
  ],
  "pins": {
    "6": "WifiLED;0",
    "7": "BL0937CF;2",
    "8": "BL0937CF1;2",
    "10": "LED_n;1",
    "11": "Btn;1",
    "24": "BL0937SEL;2",
    "26": "Rel;1"
  },
  "command": "PowerSave 1",
  "image": "https://obrazki.elektroda.pl/4824277100_1750330552.png",
  "wiki": "https://www.elektroda.com/rtvforum/topic4126933.html"
}


    I've fully reset the device and then tried this import -- works very nice.

    Edit:

    Woops, forgot screenshot:

    [BK7231T] Prosto WFU-08PM Smartplug with BL0937 Energy Monitoring

    Also added PowerSave command.
  • #6 21584554
    divadiow
    Level 35  
    updated PR. If you're able to extract that file we can confirm the module. I think it'll be WB2S, same as the non-power metering Presto already in device list.
  • #7 21584561
    lukabodroza
    Level 3  
    I managed to fully miss the config file part...

    How/Where do I extract the config file? If it's from cloudcutter sadly I don't have it anymore.

    I'm a dumb*ss, I just saw it's a gif, posting it in a sec.

    Added after 3 [minutes]:

    Here you go, added as an attachment.
    Attachments:
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  • #9 21584696
    DeDaMrAz
    Level 20  
    As a word of caution since I've been operating these devices for some time now, while in there replace the 470uF/16V (or 10V) cap with something of good known quality!! Or you will, as I did several times, have to go back in again and replace it once reading start to go crazy or device begins browning out due to that cap leaking or bursting.
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Topic summary

The discussion focuses on the Prosto WFU-08PM Smartplug featuring energy monitoring based on the BK7231T chip and the BL0937 power monitoring IC. Initial attempts to optimize the device included adding the "PowerSave 1" command to reduce power supply wear and heat, though temperature remained around 60°C. Configuration adjustments were made by updating the JSON device definition, removing unnecessary feature flags, and confirming the device module as WB2S, consistent with similar Prosto models. Users shared a pull request to improve support in the OpenBekenIOT webapp. A critical hardware recommendation was to replace the original 470µF/16V (or 10V) electrolytic capacitor with a high-quality component to prevent measurement errors and device instability caused by capacitor leakage or failure. Additional references to capacitor-related issues and fixes were provided, including links to related forum topics addressing device malfunctions such as chirping or brownouts.
Summary generated by the language model.
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