Elektroda.com
Elektroda.com
X
Elektroda.com

[BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)

leoshusar 546 4
  • Brand: Immax
    Model: MK-C37-5LU-20SMD-DLV01
    Chip: BK7231N [CBLC5]
    Local Vendor: https://www.immax.cz/immax-neo-lite-smart-zar...t-barevna-a-bila-stmivatelna-wifi-c37-p11837/

    I've got 3 of these bulbs and wanted to throw Tuya where it belongs. So I bought one more for disassembly, because I didn't know if I'll be able to reassemble it again. I dumped the FW, sent profile request for Cloudcutter and waited. Glad I bought one, because it was impossible to reassemble. If you disassemble it the wrong way.

    After a month of waiting, I've lost my patience with Tuya and finally decided to flash it manually. I bought one more for another test and sure enough I found a way to not destroy it.

    You will need point tip soldering station and steady hand.

    Here is the bulb:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)

    Opening it is quite easy. You can press around the seal and this will loosen it, once you can rotate it, just pop it off.
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)

    Now the hard part. You cannot just rip it off, because the neutral AC wire is pushed between the plastic and thread. If you pull it out, you won't be able to reassemble it. Maybe if you soldered a wire directly to the thread from the inside.
    The second wire is pushed under the bottom pin - if you rip off this one, it's still possible to put it back, because that pin falls off.

    So, what now?
    First press on these pins with something to push them down, this will give you more place to not rip off AC wires:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)
    Now get something thin that will act like a hook, I used thin allen key.
    Stick it in the WiFi antenna hole:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE) [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)
    Now you can pull hard on it to pop the module off. I had to hold it with pliers and pulled really hard.
    Be careful to not pull it all the way! Do it just like this:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)



    Now stick something like flat screwdriver where the arrow points - between the white PCB and the base module. With the screwdriver you will hold the base module while pulling off the LED PCB:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)
    You might also use razor knife to cut the silicone glue on the left side, but sometimes it's not necessary.

    Pull it off and the first hard part is done! (yellow circle is where I held my screwdriver - I hope it's understandable)
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)

    Now second hard part. Soldering!
    Since we cannot pull the base out, we need to solder it as it is. Here is where your steady hand comes in.
    There is CBLC5 module and UART pins are in the back, in that tight space:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)
    But it's doable!
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)

    Now I just soldered GND because I was too lazy to find which of those 6 pins is GND:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)
    Then I screwed it in my desk lamp (yes, I was also lazy to find VCC :) ), connected UART and flashed. Easy!
    Don't connect anything to mains unless you know what you're doing! Or rather even if you know what you are doing.

    This is what it looks like when you pull it all out, so you don't have to:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)
    And this is where AC wires were - live under the bottom pin and neutral under that "thing" on the top:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)

    Now reassembly. Quite easier process.
    I used thin string, put it under / around the Tuya module and pulled it through the WiFi hole:
    [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE) [BK7231N] 6W RGBCCT E14 LED candle bulb with reassembly (Immax Neo LITE)
    This was so I can pull the base module up with the string and push the LED module on those pins again. If you just try to push on it, the base module will "spring down", because it's just holding on wires and doesn't have any support.

    Now just pull the string out and done!

    Code:

    P24: BP1658CJ_DAT
    P26: BP1658CJ_CLK

    I can finally remove the stupid abandoned Tuya integration from HA.

    I hope somebody will find this useful!

    Cool? Ranking DIY
    About Author
    leoshusar
    Level 3  
    Offline 
    leoshusar wrote 5 posts with rating 5, helped 0 times. Been with us since 2022 year.
  • #2
    ferbulous
    Level 13  
    I applaud your soldering skills, i don’t think i can accomplish the same thing in that tight space

    As for the AC neutral wire between the plastic and the scree thread. Wouldn’t it be easier to just remove the screw in the first place just like in this tutorial?



  • #3
    p.kaczmarek2
    Level 28  
    leoshusar wrote:

    Then I screwed it in my desk lamp (yes, I was also lazy to find VCC :) ), connected UART and flashed. Easy!

    Please do not ever connect devices with flashing circuit to mains! This is very dangerous. You could even make a short and blow both device and PC. It is better to keep all tinkering to low voltage only, for your own safety.

    Aparat from that, nice guide. Flashing by wires is not so hard, with a correct approach one could flash many bulbs by wires in a hour or so.
  • #4
    leoshusar
    Level 3  
    Thank you both!

    I tried to remove the thread on my first already broken test bulb and didn't manage to remove it without breaking even more. This way was a little harder but less destructive and I'm all for non destructive ways.

    I also added warning about the mains. I need to buy some adjustable power supply for these things, I currently don't have one.
  • #5
    p.kaczmarek2
    Level 28  
    Everything you need for the Beken (or BL602, or XR809, or W600, etc) "hacking" (as people say) is the USB to UART converter and 3.3V LDO (I am using TC1264-3.3V). Futhermore, you will most likely need a separate USB cable for powering the device (through the mentioned 3.3V LDO, of course, not directly from 5V) and separate USB to UART converter for flashing. This is because the easiest way to reboot the device is to do a power on/off cycle, that way you don't have to solder CEN, just RX, TX, 3.3V and GND.