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[BK7231N/CBLC5] Flashing LSC Smart Connect A60 E27 RGB Bulb with BK7231N and CBLC5 Module

gehaxelt 585 2
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  • Helpful post
    #1 21419280
    gehaxelt
    Level 6  
    Hi there,

    this is my first post, so please let me know if I overlooked any rules or forgot to add anything...
    I have bought a LSC Smart Connect A60 E27 RGB light bulb. Teardown is similar to the previous versions, but I believe this to be a new version.

    LSC Smart Connect bulb packaging with technical specifications
    Teardown of LSC Smart Connect bulb with connected wires and PCBite probes

    After opening the bulb, I learned the following:

    - It comes with a CBLC5 module from Tuya which contains a BK7231N.
    - The LED driver appears to be KP18058 (?)
    - Since I didn't want to remove the PCB from the socket for easier reassembly, I soldered VCC and GND and used PCBites for TX1 and RX1. There's not much space, but flashing worked out without problems with BKN Flasher GUI and the power on/off method.
    - The GUI's config extractor showed:

    Code: text Expand Select all Copy to clipboard
    
{
   "Jsonver":"1.1.9",
   "brightmin":"10",
   "gmwb":"75",
   "title20":"0",
   "gmwg":"70",
   "wfcfg":"spcl_auto",
   "colormin":"10",
   "pmemory":"1",
   "gmkb":"60",
   "cmod":"rgbcw",
   "kp58comps_slope":"1",
   "mixway":"0",
   "kp58rgb_mode":"0",
   "kp58comps_rc":"1",
   "cwtype":"0",
   "rstbr":"100",
   "colormax":"100",
   "kp58wcur":"10",
   "iicw":"3",
   "notdisturb":"0",
   "module":"CBLC5",
   "iicsda":"6",
   "cwmaxp":"100",
   "dmod":"9",
   "iicc":"4",
   "brightmax":"98",
   "iicg":"1",
   "wfct":"3",
   "iicr":"2",
   "defbright":"100",
   "rstcor":"c",
   "rstnum":"3",
   "deftemp":"100",
   "bleonoff":"1",
   "kp58ccur":"5",
   "iicb":"{nc_tp",
   "ssid":"null",
   "passwd":"null",
   "md":"0",
   "wfb64":"1",
   "stat":"0",
   "token":"null",
   "region":"null",
   "reg_key":"null",
   "dns_prio":"0 }{uuid",
   "psk_key":"dLAxzodD7z4TiwkIecVkeWY8R0BXAMTedrz8t",
   "auth_key":"8C37n7GnZCjzcWsx1NbcDQev2KWiNI0V",
   "ap_ssid":"SmartLife",
   "ap_passwd":"null",
   "country_code":"CN",
   "bt_mac":"null",
   "bt_hid":"null",
   "prod_test":"false",
   "fac_pin":"gql7pvxvlawmudor }0",
   "iicscl":"24",
   "wt":"20",
   "prodagain":"0",
   "kp58comps_start":"13",
   "remdmode":"0",
   "cagt":"20",
   "colorpfun":"0",
   "kp58comps_lv":"1",
   "gmwr":"100",
   "rgbt":"20",
   "gmkg":"60",
   "onoffmode":"1",
   "rsttemp":"100",
   "category":"0505",
   "gmkr":"80",
   "defcolor":"c",
   "crc":"8"
}

    and
    Code: text Expand Select all Copy to clipboard
    
Device configuration, as extracted from Tuya: 
- KP18058DAT on P6
- KP18058CLK on P24
- LED remap is 2 1 {nc_tp 4 3
Device seems to be using CBLC5 module, which is using BK7231N.
And the Tuya section starts at UNCOMMON POSITION 0


    But importing it in OpenBeken's Web UI generated invalid commands. After going through some more posts in the forum, I figured out the following configuration:

    Code: text Expand Select all Copy to clipboard
    
ClearIO // clear old GPIO/channels
lfs_format // clear LFS
StartupCommand ""  // clear STARTUP
stopDriver *  // kill drivers
startDriver KP18058  // so we have led_map available
setPinRole 6 KP18058_DAT
setPinRole 24 KP18058_CLK
KP18058_Map 2 1 0 4 3 


    Which appears to work:

    LSC Smart Connect A60 E27 RGB bulb glowing brightly.

    There are some questions I have at the end:

    1) The bulb got really hot (OpenBeken reported 100*C after 5mins). I don't think this is normal - do I need to limit the LED's current using KP18058_Cur? What are sensible values?

    2) Does anyone want to have a look at the firmware to update the extractor?

    3) Is there anything else I should share so you can update the device list?

    All the best
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  • #2 21420423
    divadiow
    Level 34  
    gehaxelt wrote:
    1) The bulb got really hot (OpenBeken reported 100*C after 5mins). I don't think this is normal - do I need to limit the LED's current using KP18058_Cur? What are sensible values?


    Might be an idea to mirror those values in OBK
    Have you also set powersave 1 in startup command or autoexec?
  • #3 21422346
    gehaxelt
    Level 6  
    Hi,

    thanks! I have played around with the values a bit and setting the current to 4 4 keeps the bulb below 80° C at 100% brightness.

    Here's the full config:

    Code: text Expand Select all Copy to clipboard
    
{
  "vendor": "Action",
  "bDetailed": "0",
  "name": "LSC Smart Connect LED Smart Lightbulb A60 E27 RGB (WiFi)",
  "model": "ArtNo. 2578539.1",
  "chip": "BK7231N",
  "board": "CBLC5",
  "flags": "5124",
  "keywords": [
    "Action LCS",
    "Lightbulb",
    "BK7231N",
    "CBLC5",
    "OpenBeken"
  ],
  "pins": {
    "6": "KP18058_DAT;0",
    "24": "KP18058_CLK;0"
  },
  "command": "backlog PowerSave 1; KP18058_Current 4 4; Dimmer 50;",
  "image": "https://obrazki.elektroda.pl/9597690800_1738360849.jpg",
  "wiki": "https://www.elektroda.com/rtvforum/topic4103341.html"
}


    All the best
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