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[BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW

ferbulous 4962 23
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  • This is a short teardown of the Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW based on - BK7231N (CB2L).

    Basic information:
    Brand: Aubess
    Chip: CB2L (BK7231N) - the chip listed is QM-02L, but seems to be another variant of CB2L
    Local Vendor: https://www.aliexpress.com/item/1005004846008613.html


    Teardown Photos:
    [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW
    [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW


    Flashing method:
    a) Using tuya-cloudcutter
    1. Select profile with firmware version 1.3.21

    b) Serial:
    1. You'll need to desolder the CB2L chip because the TX & RX pin are not accessible from the back
    2. Using serial method with hid_download tool. Start flashing and do a power cycle or ground the CEN pin.
    UART TX --> PCB RX
    UART RX --> PCB RX
    UART GND --> PCB GND
    UART 3.3V --> PCB 3.3V

    Pinout:
    PinAssignment
    P8PWM 1
    P7PWM 2
    P6PWM 3
    P24PWM 5
    P26PWM 4

    Cool? Ranking DIY
    About Author
    ferbulous
    Level 18  
    Offline 
    ferbulous wrote 417 posts with rating 55, helped 8 times. Been with us since 2022 year.
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  • #2 20396948
    Zain00
    Level 10  
    Thank you for the review.
    I ordered this bulb https://www.aliexpress.com/item/1005004816481....order_list.order_list_main.22.51fc1802pM0UN1 and it's identical to yours.

    Flashed it using tuya-cloudcutter and set the pins and it's working now.

    What I didn't like about this bulb is Color temperature it's 3000k - 6500k not 2700k - 6000K as advertised in the seller page
    I still like the sonoff bulb better because it gives 2700k color
  • #3 20404156
    spin55
    Level 17  
    Hello. I have flashed via USB and it works, but I have a problem.
    The light bulb is integrated into Home Assistant and from here I can control it and it updates the values ​​fine on the web, but when I control it from here it doesn't update the values ​​in Home Assistant. Any ideas?

    Code: text Expand Select all Copy to clipboard
    mqtt:
  light:
  - unique_id: "OpenBK7231N_FF2F4FEB_light"
    name: "obkFF2F4FEB 0"
    rgb_command_template: "{{ '#%02x%02x%02x0000' | format(red, green, blue)}}"
    rgb_value_template: "{{ value[0:2]|int(base=16) }},{{ value[2:4]|int(base=16) }},{{ value[4:6]|int(base=16) }}"
    rgb_state_topic: "obkFF2F4FEB/led_basecolor_rgb/get"
    rgb_command_topic: "cmnd/obkFF2F4FEB/led_basecolor_rgb"
    command_topic: "cmnd/obkFF2F4FEB/led_enableAll"
    state_topic: "obkFF2F4FEB/led_enableAll/get"
    availability_topic: "obkFF2F4FEB/connected"
    payload_on: 1
    payload_off: 0
    brightness_command_topic: "cmnd/obkFF2F4FEB/led_dimmer"
    brightness_state_topic: "obkFF2F4FEB/led_dimmer/get"
    brightness_scale: 100
    #brightness_value_template: "{{ value }}"
    color_temp_command_topic: "cmnd/obkFF2F4FEB/led_temperature"
    color_temp_state_topic: "obkFF2F4FEB/led_temperature/get"
    #color_temp_value_template: "{{ value }}"

    Regards

    It's fixed. The problem was the redrafting of yaml text.
  • #4 20404232
    Zain00
    Level 10  
    @spin55 Did you have the QM-02L module ? I removed the module from the board but Tx and Rx were not marked
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  • #5 20404290
    spin55
    Level 17  
    They are marked as:
    P10 --> RXD1
    P11 --> TXD1
    P0 --> TXD2
    P1 --> RXD2
    This module is the same as the CB2L, only the nomenclature of the pads changes.
    I say this from memory because I have already closed the bulb.
    Regards

    To remove the QM-02L module, it is convenient to unsolder the electrolytic capacitor next to it, which is lying horizontally.

    [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW
  • #6 20410879
    spin55
    Level 17  
    Hello,
    I'm trying to get an RGBCW bulb to turn on when the toggle switch is flipped.
    For this I have put the following code in autoexec.bat:
    Code: text Expand Select all Copy to clipboard
    backlog led_basecolor_rgb FFFFFF; led_enableAll 1; led_dimmer 100

    The bulb turns on correctly but after a few seconds it goes off.
    Looking at the Log it seems that it starts with a certain configuration in MQTT that overrides the one in autoexec.bat

    Info:MQTT:Publishing val 40FF00 to obkFF2F4FEB/led_basecolor_rgb/get retain=0
    Info:MQTT:Publishing val 463 to obkFF2F4FEB/led_temperature/get retain=0
    Info:MQTT:Publishing val 0 to obkFF2F4FEB/led_enableAll/get retain=0
    Info:MQTT:Publishing val 38 to obkFF2F4FEB/led_dimmer/get retain=0

    Code: Text
    Log in, to see the code


    Any solution?
  • #7 20410903
    ferbulous
    Level 18  
    @spin55 do you have flag 12 enabled?
    Are you turning off the relay from the switch or using detached mode to keep the bulb always online?
  • #8 20410941
    spin55
    Level 17  
    The bulb only connects to the mains when I flip the switch, that's why I have put the code in the starter.
    I did not have Flag12 activated because I considered that I did not need it, however I did the test activating it and it continues the same.
    When the switch is activated, 230 volts are applied and it turns on correctly, but after a few seconds it turns off by itself.
    The idea is that it works like a normal light bulb when turned on, and once turned on, it can be controlled remotely via the web or Home Assistant.
    Regards

    In Esphome, the bulb turns on during startup and does not go out until Home Assistant is activated or the power is cut off with the switch:
    Code: text Expand Select all Copy to clipboard
    esphome:
  name: albertlight
  platform: ESP8266
  board: esp8285
  on_boot:
    then:
      - switch.turn_on: relay

    It is a series connection, the bulb is powered through the mains on/off switch.
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  • #9 20411132
    ferbulous
    Level 18  
    @spin55 I’m using slightly different command on startup for the cold white and flag 12 disabled

    Code: text Expand Select all Copy to clipboard
    
backlog led_temperature 154; led_enableAll 1; led_dimmer 100
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  • #10 20411582
    spin55
    Level 17  
    @ferbulous, thanks, I've tried it and same effect. It turns on fine but then shuts itself off.
    Does that backlog command run from autoexec at startup when you plug in the bulb?
    I clarify that once the bulb is turned on, the operation is correct both from the web and Home Assistant. The problem occurs when turning it on for the first time or doing a Restart.

    Would you mind posting a Log, similar to mine, after a Restart or disconnection/connection?
    thanks
  • #11 20411724
    ferbulous
    Level 18  
    @spin55 i’ll update tomorrow once i’m home.
    Maybe there’s some automation running that keeps toggling it off?
  • #12 20415145
    ferbulous
    Level 18  
    @spin55

    This is the logs after it's turned on


    Code: text Expand Select all Copy to clipboard
    Info:GEN:sta:rssi=-60,ssid=Suliana,bssid=a0:ab:1b:84:8c:d0 ,channel=10,cipher_type:CCMP
Info:MAIN:Main_Init_Before_Delay
Info:CFG:####### Boot Count 44 #######
Warn:CFG:CFG_InitAndLoad: Correct config has been loaded with 19 changes count.
Error:CMD:no file early.bat err -2
Info:GEN:PIN_SetupPins pins have been set up.
Info:CFG:####### Flash Save LED #######
Info:MAIN:Main_Init_Before_Delay done
Info:MAIN:Main_Init_Delay
Info:MAIN:Main_Init_Delay done
Info:MAIN:Main_Init_After_Delay
Info:MAIN:Using SSID [Suliana]
Info:MAIN:Using Pass [0122345318]
Info:MQTT:MQTT_RegisterCallback called for bT aubess_bulb5/ subT aubess_bulb5/+/set
Info:MQTT:MQTT_RegisterCallback called for bT cmnd/aubess_bulb5/ subT cmnd/aubess_bulb5/+
Info:MQTT:MQTT_RegisterCallback called for bT cmnd/BK7231N/ subT cmnd/BK7231N/+
Info:MQTT:MQTT_RegisterCallback called for bT aubess_bulb5/ subT aubess_bulb5/+/get
Info:CFG:####### Flash Save LED #######
Info:CFG:####### Flash Save LED #######
Info:CFG:####### Flash Save LED #######
Info:MAIN:Main_Init_After_Delay done
Info:MAIN:Time 1, idle 276279/s, free 80224, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 2, idle 188783/s, free 80224, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Boot complete time reached (1 seconds)
Info:CFG:####### Set Boot Complete #######
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 3, idle 181008/s, free 80224, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 4, idle 190402/s, free 80224, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 5, idle 189051/s, free 80224, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:ssid:Suliana key:0122345318
Info:MAIN:Time 6, idle 192871/s, free 75264, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 7, idle 187530/s, free 74192, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 8, idle 113318/s, free 73880, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 9, idle 0/s, free 73880, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 10, idle 0/s, free 73880, MQTT 0(0), bWifi 0, secondsWithNoPing -1, socks 2/38 
Info:GEN:dhcp=0 ip=0.0.0.0 gate=0.0.0.0 mask=0.0.0.0 mac=fc:67:1f:59:d1:f6 
Info:GEN:sta: 0, softap: 0, b/g/n
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:wl_status 3
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_CONNECTING - 1
Info:MAIN:wl_status 10
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_CONNECTED - 4
Info:MAIN:wl_status 11
Info:MAIN:Main_OnWiFiStatusChange - WIFI_STA_CONNECTED - 4
Info:MAIN:Time 11, idle 55500/s, free 74552, MQTT 0(0), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MAIN:Time 12, idle 187763/s, free 74592, MQTT 0(0), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MQTT:mqtt_user
mqtt_pass 
mqtt_clientID aubess_bulb5
mqtt_host 192.168.1.40:1883
Info:MAIN:Time 13, idle 188751/s, free 74312, MQTT 0(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:HA discovery is scheduled, but MQTT connection is not present yet
Info:MQTT:mqtt_connection_cb: Successfully connected
Info:MQTT:mqtt_subscribed to aubess_bulb5/+/set
Info:MQTT:mqtt_subscribed to cmnd/aubess_bulb5/+
Info:MQTT:mqtt_subscribed to cmnd/BK7231N/+
Info:MQTT:mqtt_subscribed to aubess_bulb5/+/get
Error:MQTT:MQTT client "aubess_bulb5" request cb: err 0
Error:MQTT:MQTT client "aubess_bulb5" request cb: err 0
Error:MQTT:MQTT client "aubess_bulb5" request cb: err 0
Error:MQTT:MQTT client "aubess_bulb5" request cb: err 0
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_enableAll/get
Info:MQTT:MQTT in topic aubess_bulb5/led_enableAll/get
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_temperature/get
Info:MQTT:MQTT in topic aubess_bulb5/led_temperature/get
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_dimmer/get
Info:MQTT:MQTT in topic aubess_bulb5/led_dimmer/get
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_finalcolor_rgbcw/get
Info:MQTT:MQTT in topic aubess_bulb5/led_finalcolor_rgbcw/get
Info:MQTT:channelSet part topic led_enableAll/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MQTT:channelSet part topic led_temperature/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MQTT:channelSet part topic led_dimmer/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MQTT:channelSet part topic led_finalcolor_rgbcw/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MQTT:Publishing val aubess_bulb5 to aubess_bulb5/host retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -13 result 0
Info:MAIN:Time 14, idle 156610/s, free 74504, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will scheduled HA discovery in 9 seconds
Info:MQTT:Publishing val Build on Jan 24 2023 03:37:40 version 1.15.377 to aubess_bulb5/build retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -12 result 0
Info:MAIN:Time 15, idle 186679/s, free 74232, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will scheduled HA discovery in 8 seconds
Info:MQTT:Publishing val fc:67:1f:59:d1:f6  to aubess_bulb5/mac retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -11 result 0
Info:MAIN:Time 16, idle 189376/s, free 74504, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will scheduled HA discovery in 7 seconds
Info:MQTT:Publishing val 2 to aubess_bulb5/sockets retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -8 result 0
Info:MAIN:Time 17, idle 190986/s, free 74504, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will scheduled HA discovery in 6 seconds
Info:MQTT:Publishing val -61 to aubess_bulb5/rssi retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -7 result 0
Info:MAIN:Time 18, idle 189454/s, free 74272, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will scheduled HA discovery in 5 seconds
Info:MQTT:Publishing val 18 to aubess_bulb5/uptime retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -6 result 0
Info:MAIN:Time 19, idle 377989/s, free 74504, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will scheduled HA discovery in 4 seconds
Info:MQTT:Publishing val 74504 to aubess_bulb5/freeheap retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -5 result 0
Info:MAIN:Time 20, idle 187656/s, free 74504, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:GEN:dhcp=0 ip=192.168.1.105 gate=192.168.1.1 mask=255.255.255.0 mac=fc:67:1f:59:d1:f6 
Info:GEN:sta: 1, softap: 0, b/g/n
Info:GEN:sta:rssi=-61,ssid=Suliana,bssid=a0:ab:1b:84:8c:d0 ,channel=10,cipher_type:CCMP
Info:MAIN:Will scheduled HA discovery in 3 seconds
Info:MQTT:Publishing val 192.168.1.105 to aubess_bulb5/ip retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -4 result 0
Info:MAIN:Time 21, idle 181249/s, free 74504, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will scheduled HA discovery in 2 seconds
Info:MQTT:Publishing val 1 to aubess_bulb5/led_enableAll/get retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -3 result 0
Info:MAIN:Time 22, idle 188058/s, free 74264, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will scheduled HA discovery in 1 seconds
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_enableAll/get
Info:MQTT:MQTT in topic aubess_bulb5/led_enableAll/get
Info:MQTT:channelSet part topic led_enableAll/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MQTT:Publishing val 155 to aubess_bulb5/led_temperature/get retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -2 result 0
Info:MAIN:Time 23, idle 183964/s, free 74504, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MAIN:Will do request HA discovery now.
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_temperature/get
Info:MQTT:MQTT in topic aubess_bulb5/led_temperature/get
Info:MQTT:Queued topic=homeassistant/light/OpenBK7231N_aubess_bulb5_light/config, 1 items in queue
Info:MQTT:channelSet part topic led_temperature/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MQTT:Publishing val 100 to aubess_bulb5/led_dimmer/get retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -1 result 0
Info:MAIN:Time 24, idle 188609/s, free 73088, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_dimmer/get
Info:MQTT:MQTT in topic aubess_bulb5/led_dimmer/get
Info:MQTT:channelSet part topic led_dimmer/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MAIN:Time 25, idle 185275/s, free 73328, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MQTT:Publishing val (812 bytes) to homeassistant/light/OpenBK7231N_aubess_bulb5_light/config retain=1
Info:MAIN:Time 26, idle 190208/s, free 72248, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MQTT:Publishing val 1 to aubess_bulb5/led_enableAll/get retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -3 result 0
Info:MAIN:Time 27, idle 183862/s, free 73328, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_enableAll/get
Info:MQTT:MQTT in topic aubess_bulb5/led_enableAll/get
Info:MQTT:channelSet part topic led_enableAll/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MQTT:Publishing val 155 to aubess_bulb5/led_temperature/get retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -2 result 0
Info:MAIN:Time 28, idle 183562/s, free 73120, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_temperature/get
Info:MQTT:MQTT in topic aubess_bulb5/led_temperature/get
Info:MQTT:channelSet part topic led_temperature/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MQTT:Publishing val 100 to aubess_bulb5/led_dimmer/get retain=1
Info:MQTT:[g_bPublishAllStatesNow] item -1 result 0
Info:MAIN:Time 29, idle 191147/s, free 73328, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:MQTT:MQTT client in mqtt_incoming_publish_cb topic aubess_bulb5/led_dimmer/get
Info:MQTT:MQTT in topic aubess_bulb5/led_dimmer/get
Info:MQTT:channelSet part topic led_dimmer/get
Info:MQTT:channelSet channel 0
Info:MQTT:channelSet NOT 'set'
Info:MAIN:Time 30, idle 184540/s, free 73328, MQTT 1(1), bWifi 1, secondsWithNoPing -1, socks 2/38 
Info:GEN:dhcp=0 ip=192.168.1.105 gate=192.168.1.1 mask=255.255.255.0 mac=fc:67:1f:59:d1:f6 
Info:GEN:sta: 1, softap: 0, b/g/n
Info:GEN:sta:rssi=-61,ssid=Suliana,bssid=a0:ab:1b:84:8c:d0 ,channel=10,cipher_type:CCMP
  • #13 20415631
    spin55
    Level 17  
    @ferbulous, thanks for the log. I have solved it by activating Flag12
    Regards
  • #14 20542579
    jkwim
    Level 12  
    Does OpenBK Support Philips Hue Emulation like Tasmota does?

    Can these be integrated with Alexa?
  • #15 20576838
    jkwim
    Level 12  
    Same product from following link worked with cloudcutter as described in OP.

    Link

    [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW
  • #16 20627709
    anthonythomas
    Level 9  
    Pins and cloudcutter work with this AliExpress Choice Day B22 bulb
    [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW [BK7231N - CB2L] Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW
  • #17 20767445
    ferbulous
    Level 18  
    After using this for a few months now, i noticed like 4-5 bulbs stop working. And it’s always the same cause which is this blown 16/10v 220uF capacitor.

    The inside of a bulb with electronic components and a highlighted capacitor.

    Don’t throw it out just yet. just get the capacitor replaced and your bulb should work again
  • #18 20985289
    divadiow
    Level 34  
    I grabbed a couple of these from Ali. Went for the B22 bayonet fitting.

    Two smart LED bulbs with B22 on an online store page.

    I need module de-soldering practice so went for that option instead of cloudcutter.

    Close-up of a circuit board with electronic components. Close-up of a circuit board with component markings and solder points.

    After removing the capacitor, fluxing the pads and adding a little extra solder to the length, the module slid off very easily after holding the soldering iron down across the length of the module for a short period. The flux creeping under the module acting as lube helps make it float.

    I made a new pin pic

    QM-02L module with pin labels.

    then captured boot log. Curiously it was boot looping. Yes I'm using a decent 3.3v supply.

    Code: text Expand Select all Copy to clipboard
    V:BK7231N_1.0.1
REG:cpsr     spsr     r13      r14
SVC:000000D3          00401C1C 000033AC
IRQ:000000d2 00000010 00401e0c 2348a230 
FIR:000000d1 00000010 00401ffc 00333768 
SYS:000000df          0040192c 00000158 
ST:00000000
J 0x10000
bk_misc_init_start_type 0 0
[MEM DBG] heap init-------size:164664 addr:0x407cc8---------
[Flash]id:0xeb6015
[load]bandgap_calm=0x5a->0x1a,vddig=4->5
[bk]tx_txdesc_flush
tkl_ethernetif_init
tkl_ethernetif_init
tkl_ethernetif_output: invalid vif: 255!
tkl_ethernetif_output: invalid vif: 255!
[01-01 00:00:00 TUYA N][lr:0x48147] crc_r[ca] crc_g[00] crc_b[67]
[01-01 00:00:00 TUYA E][lr:0xccc53] uf_open 8 err 8
[01-01 00:00:00 TUYA N][lr:0x55b63] reset is 0>>
[01-01 00:00:00 TUYA N][lr:0x55771] BleSwitch=1
[01-01 00:00:00 TUYA E][lr:0xccc53] uf_open 8 err 8
[01-01 00:00:00 TUYA N][lr:0x55b63] reset is 0>>
[01-01 00:00:00 TUYA N][lr:0x55795] first bright up
[01-01 00:00:00 TUYA N][lr:0x55b63] reset is 0>>
[01-01 00:00:00 TUYA E][lr:0x8968b] logseq empty
ota don't start or start err, can't end inform!
*******************************tuya_os_adapt_set_cpu_lp_mode,en = 1, mode = 0
pmu_release_wakelock(PMU_OS)
g_wifi_core.io_queue null
bk_wlan_mcu_ps_mode_enable()
*******************************tuya_os_adapt_set_cpu_lp_mode,en = 0, mode = 0
g_wifi_core.io_queue null
bk_wlan_mcu_ps_mode_disable()
bk_ps_mode_disable
[01-01 00:00:00 TUYA N][lr:0xba753] key_addr: 0x1ee000   block_sz 4096
[01-01 00:00:00 TUYA N][lr:0xba821] get key:
0x95 0xf2 0xc7 0x5d 0x18 0x1d 0xb3 0x7a 0xe2 0x0 0xf3 0x78 0x5f 0x8f 0xfd 0xae 
[01-01 00:00:00 TUYA N][lr:0x91ac9] uni_random_init...
[01-01 00:00:00 TUYA N][lr:0x88269] tuya_tls_rand_init ok!
[01-01 00:00:00 TUYA N][lr:0x4abf1] Light will reset!
bk_reboot


    factory fw dump attached.

    Easy UART Flasher 1.1.6 misses out P24 in its config analysis

    Device configuration from Tuya

    User interface of the OpenBK application for controlling LED lighting.

    Close-up view of a circuit board with two large electrolytic capacitors mounted vertically. Close-up of an electronic module labeled QM-02L on a wooden surface. Electronic module with components on a wooden table.
    Close-up of the BK7231N electronic module with connected test probes.

    deviclist entry tweaked slightly https://github.com/OpenBekenIOT/webapp/pull/82
    Attachments:
  • #19 20985508
    insmod
    Level 23  
    Mine arrived today, it has CB2L, instead of QM-02L. It also had 1.5.21 firmware, so unable to flash via cloudcutter, only UART.
    Close-up of an electronic board with a module labeled CB2L and LEDs.
  • #20 20985529
    divadiow
    Level 34  
    ferbulous wrote:
    Don’t throw it out just yet. just get the capacitor replaced and your bulb should work again


    @ferbulous I expect a number of my devices are ticking time bombs for failing capacitors. I should stock up on decent replacements. Did you go for particular brand?
  • #21 20985546
    ferbulous
    Level 18  
    @divadiow no preference, i just grabbed whichever i found online

    Some other issues :

    1) Only 1/2 leds lit up (either warm or cold led)
    Image of an LED board with flickering diodes in a lamp.

    2) Cold led light doesn’t lit up at all, but warm and rgb works just fine

    Both seem to be related to the led plate, if I swap with another working led plate. All the leds work just fine.
    I’ve stored the defect ones in the bin until i have some time to troubleshoot it

    Also noticed Cozylife E27 seems to be using the same hardware but with BL602
  • #22 20985568
    divadiow
    Level 34  
    indeed. PCB seems to be fairly consistent across lots of offerings.
  • #23 20987415
    divadiow
    Level 34  
    ferbulous wrote:
    Cold led light doesn’t lit up at all, but warm and rgb works just fine

    Did it fail on its own or when you were fiddling?
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Topic summary

The discussion revolves around the Aubess WiFi Smart LED Light Bulb 15W E27 RGBCW, utilizing the BK7231N (CB2L) chip. Users share experiences with flashing the bulb using tuya-cloudcutter and address issues related to color temperature discrepancies, integration with Home Assistant, and operational problems after power cycling. Several users report successful flashing and control via MQTT, while others encounter challenges with the bulb turning off unexpectedly. The conversation also touches on hardware modifications, including desoldering the chip and capacitor replacements for malfunctioning bulbs. Users provide insights into troubleshooting and configuration settings to maintain functionality.
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