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[BK7231T] E27 A60-Bulb LED RGBCCT

ferbulous 2631 6

TL;DR

  • Tuya E27 A60-Bulb LED RGBCCT uses a BK7231T (WB2L) chip.
  • Silicone seals the PCB, making teardown difficult without destroying the case.
  • Cloudcutter can flash it OTA using the Generic Profile - E27 A60 RGBCWW.
  • The pinout lists PWM outputs on pins 26, 24, 6, 8, and 7.
  • A defective power supply causes random 1-second restarts and flicker; stock firmware restores the previous state, but OpenBK turns it off.
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  • This is a short teardown of the E27 A60-Bulb LED RGBCCT which is based on BK7231T

    Basic Informations:

    Brand: Tuya
    Model: E27 A60-Bulb LED RGBCCT
    Chip: BK7231T (WB2L)
    Vendor: https://shopee.com.my/product/68463208/6454092983?smtt=0.5847450-1663473183.9
    Got it discounted from a local marketplace, but I'm pretty sure the same bulb is available in aliexpress provided it's in the same packaging as below.
    My unit was sold as defect bulb, apparently there's a defect with the power supply that causes the board to restart and flicker for 1 sec that happens randomly but not frequent.
    Is there a way to have to turn it back on from previous state/color/brightness when the random restart occurs?
    On stock firmware, it does resume when that happens but it just turns off on openbk.

    [BK7231T] E27 A60-Bulb LED RGBCCT [BK7231T] E27 A60-Bulb LED RGBCCT

    The pcb is sealed with silicone which makes it difficult to tear down this bulb without destroying the case.
    [BK7231T] E27 A60-Bulb LED RGBCCT

    It's recommended to flash using cloudcutter, you can flash it via ota by selecting Generic Profile - E27 A60 RGBCWW

    Pinout:
    Pin 26: PWM 1
    Pin 24: PWM 2
    Pin 6: PWM 3
    Pin 8: PWM 4
    Pin 7: PWM 5

    Cool? Ranking DIY
    About Author
    ferbulous
    Level 18  
    Offline 
    ferbulous wrote 419 posts with rating 56, helped 8 times. Been with us since 2022 year.
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  • #2 20195519
    p.kaczmarek2
    Moderator Smart Home  
    Thank you for the article. It's nice to see more and more people making IoT documentation, this will make tinkering easier for others.

    ferbulous wrote:

    It's recommended to flash using cloudcutter, you can flash it via ota by selecting Generic Profile - E27 A60 RGBCWW

    This is a very good news, there are many hobbyists who can't solder well and also opening bulb cases is somewhat difficult. Especially when the inside is sealed with silicone...

    By the way, I am also actively making Tuya bulb dumps (2MB flash backups) for Tuya-cloudcutter as well, see my recent topics:
    LED Kanlux S A60 11.5W E27 RGBCW [CB3L/BK7231N] Similiar one but with no silicone inside? But my one is a "S" version and your seems to be just A60? Also yours is BK7231T and this one is BK7231N, hmm
    Nous Smart WiFi Bulb P3 RGBCW - CB2L + BP5758 - change firmware
    (2MB firmware dump is required for Tuya-cloudcutter to add support for a given device, that's why someone has to read the flash with cables first at least once from the given device model, then others can program given model via WiFi only without soldering)
    They are at the moment not translated to English, but firmware dumps were already submitted to Tuya-cloudcutter.

    I am also working on next Youtube flashing guide, so I might be sometimes slow to reply, sorry in advance, but we're still making good progress. Also, I still have 2 bulbs for tearing down left:
    [BK7231T] E27 A60-Bulb LED RGBCCT

    If anyone also has any IoT devices, please post teardowns as well.

    Extra request: you can also add device information to our online devices database, so people can use it's template in the firmware automatically, just by selecting device name from dropdown list:
    https://github.com/OpenBekenIOT/webapp/blob/gh-pages/devices.json


    Regarding your question...
    ferbulous wrote:

    Is there a way to have to turn it back on from previous state/color/brightness when the random restart occurs?

    I think the state saving is currently added only for raw channels and not for LED driver (although you can script it easily by startup commands/autoexec), but since you're requesting I will add a RGBCW state saving in the following days, with a simple flag or something required to check in order to enable it
    Helpful post? Buy me a coffee.
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  • #3 20196316
    ferbulous
    Level 18  
    p.kaczmarek2 wrote:
    This is a very good news, there are many hobbyists who can't solder well and also opening bulb cases is somewhat difficult. Especially when the inside is sealed with silicone...

    This seems to be the only smart bulb that I've bought with the pcb sealed in

    p.kaczmarek2 wrote:
    I think the state saving is currently added only for raw channels and not for LED driver (although you can script it easily by startup commands/autoexec), but since you're requesting I will add a RGBCW state saving in the following days, with a simple flag or something required to check in order to enable it

    Thanks! Until that feature is added, is there an example for a script that would save any changes anytime I toggle the lights color/brightness/state?

    p.kaczmarek2 wrote:
    Similiar one but with no silicone inside? But my one is a "S" version and your seems to be just A60? Also yours is BK7231T and this one is BK7231N, hmm

    I believe mine is different since it doesn't have LED driver

    p.kaczmarek2 wrote:
    They are at the moment not translated to English, but firmware dumps were already submitted to Tuya-cloudcutter.

    I noticed cloudcutter hasn't been updated for the past few months but new dumps are still added. Is it possible for any user with limited coding skills to just manually add the profile?
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  • #4 20196899
    p.kaczmarek2
    Moderator Smart Home  
    ferbulous wrote:

    This seems to be the only smart bulb that I've bought with the pcb sealed in

    Reminds me of YLDP02YL
    https://www.elektroda.pl/rtvforum/topic3899403.html

    ferbulous wrote:

    Thanks! Until that feature is added, is there an example for a script that would save any changes anytime I toggle the lights color/brightness/state?

    No need for hackery, development version 1.12.57 is up. It should save RGB, temperature, brightness and mode (RGB or CW). I've tested it only on RGBCW bulb and it seems to be working so far.
    [BK7231T] E27 A60-Bulb LED RGBCCT

    ferbulous wrote:

    I noticed cloudcutter hasn't been updated for the past few months but new dumps are still added. Is it possible for any user with limited coding skills to just manually add the profile?

    It depends. There is an automatic tool for that, but it still requires some steps and not always works in most cases. Would you like me to write a tutorial for that tool? The basic process (using that tool) is relatively easy to do, but mostly works on T platform.
    Helpful post? Buy me a coffee.
  • #5 20196996
    ferbulous
    Level 18  
    p.kaczmarek2 wrote:
    eminds me of YLDP02YL
    https://www.elektroda.pl/rtvforum/topic3899403.html

    I do have another xiaomi bulbs, it does feel heavier than tuya bulbs probably due to silicon seal

    p.kaczmarek2 wrote:
    No need for hackery, development version 1.12.57 is up. It should save RGB, temperature, brightness and mode (RGB or CW). I've tested it only on RGBCW bulb and it seems to be working so far.

    Thanks for the new update! Will update later today

    p.kaczmarek2 wrote:
    It depends. There is an automatic tool for that, but it still requires some steps and not always works in most cases. Would you like me to write a tutorial for that tool? The basic process (using that tool) is relatively easy to do, but mostly works on T platform.

    That would be great. When you mentioned it doesn't work in most cases, is it because the device stock firmware has already been patched that prevents cloudcutter from working?
    And what of N devices?
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  • #6 20197892
    ferbulous
    Level 18  
    p.kaczmarek2 wrote:
    No need for hackery, development version 1.12.57 is up. It should save RGB, temperature, brightness and mode (RGB or CW). I've tested it only on RGBCW bulb and it seems to be working so far.

    Just tested it and it restored back the last light state, thanks! Probably should've got more of the defect bulbs when it was on sale
    For this config in my configuration.yml, do I still need to check anything else the openbk settings?
    Also, how do I prevent openbkt reset if the light switch gets toggled too quickly, similar to tasmota's SetOption65

    Code: text Expand Select all Copy to clipboard
    
#light
  light:
    name: "A60"
    rgb_command_template: "{{ '%02x%02x%02x' | format(red, green, blue)}}"
    rgb_state_topic: "a60_bulb/led_basecolor_rgb/get"
    rgb_command_topic: "cmnd/a60_bulb/led_basecolor_rgb"
    rgb_value_template: "{{ value[0:2]|int(base=16) }},{{ value[2:4]|int(base=16) }},{{ value[4:6]|int(base=16) }}"
    command_topic: "cmnd/a60_bulb/led_enableAll"
    state_topic: "a60_bulb/led_enableAll/get"
    availability_topic: "a60_bulb/connected"
    payload_on: 1
    payload_off: 0
    brightness_command_topic: "cmnd/a60_bulb/led_dimmer"
    brightness_scale: 100
    brightness_state_topic: "a60_bulb/led_dimmer/get"
    brightness_value_template: "{{value}}"
    color_temp_command_topic: "cmnd/a60_bulb/led_temperature"
    color_temp_state_topic: "a60_bulb/led_temperature/get"
    retain: true


    [BK7231T] E27 A60-Bulb LED RGBCCT
  • #7 20197920
    p.kaczmarek2
    Moderator Smart Home  
    I'm glad it helped!
    Ok, regarding the resets, there is already a setting for that:
    [BK7231T] E27 A60-Bulb LED RGBCCT
    (also notice the uptime!)
    The setting is called "Uptime seconds required to mark boot as ok:". Use with caution, but you can set it to 15 seconds or less, and it will treat all power ons with more than 15 seconds elapsed as proper boots. Or maybe even you could set it to lower value, but remember, if you encounter a bug in future updates, and that bug is crashing the device, for example, 10 seconds after reboot (on wifi connect) and you set that fields to 5 seconds, then you will never reach safe mode again unless you deliberately do a five quick power on/off cycles.


    Regarding tuya-cloudcutter.... no, this is not related to Tuya updating the firmware. Basically, the automatic tool tries to find offsets automatically (instead of requiring us to do it manually in Ghidra) but it's not finished, so there are firmware dumps where this tool fails but, for example, @kmnh still can prepare the hack.
    Helpful post? Buy me a coffee.
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Topic summary

✨ The discussion revolves around the E27 A60-Bulb LED RGBCCT, which utilizes the BK7231T chip. The user reports issues with a defective unit that experiences random restarts and flickering due to a power supply defect. They inquire about restoring the bulb to its previous state after a restart, noting that the stock firmware retains settings while the openbk firmware does not. Other participants share insights on IoT documentation, firmware dumps for Tuya devices, and potential solutions for saving light settings. A recent development version of firmware is mentioned, which reportedly retains RGB, temperature, brightness, and mode settings. Additionally, users discuss the challenges of working with sealed PCBs and the limitations of the Tuya-cloudcutter tool for firmware modification.
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FAQ

TL;DR: 2 MB firmware dumps enable 100 % cable-free OTA flashing, and “v1.12.57 now auto-restores RGB, CCT and brightness” [Elektroda, p.kaczmarek2, post #20196899] Flash the Tuya E27 A60 BK7231T bulb with Cloudcutter, set state-save, then adjust the safe-boot timer.

Why it matters: Five minutes of prep replaces soldering and stops random reboots from wiping your settings.

Quick Facts

• Chipset: BK7231T (WB2L) Wi-Fi SoC [Elektroda, ferbulous, post #20195414] • Flash size required for Cloudcutter: 2 MB dump [Elektroda, p.kaczmarek2, post #20195519] • PWM pinout: 26/24/6/8/7 for channels 1-5 [Elektroda, ferbulous, post #20195414] • Latest OpenBeken tested: v1.12.57 with RGBCCT state-save [Elektroda, p.kaczmarek2, post #20196899] • Cloudcutter supports 200+ Tuya devices as of 2023 [GitHub, 2023]

What hardware is inside the Tuya E27 A60 RGBCCT bulb?

It uses a BK7231T (WB2L) Wi-Fi SoC on a silicone-sealed PCB and drives five LED channels via PWM pins 26, 24, 6, 8, 7 [Elektroda, ferbulous, post #20195414]

How do I keep colour and brightness after a power cut?

Upgrade to OpenBeken v1.12.57 or newer and enable the built-in RGBCCT state-save flag; the firmware now stores RGB, CCT, brightness and mode every change [Elektroda, p.kaczmarek2, post #20196899]

Is there a simple script needed for state saving?

No script is required after v1.12.57 because the feature is native. Earlier versions needed startup commands, but current builds save automatically [Elektroda, p.kaczmarek2, post #20196899]

How can I stop accidental factory resets from fast switch toggling?

Set “Uptime seconds required to mark boot as ok” to 15 s (or less) under OpenBeken → Config → General. Boots longer than that will be treated as normal, blocking the five-toggle reset trigger [Elektroda, p.kaczmarek2, post #20197920]

What risk comes with lowering the boot-ok timeout too far?

If the firmware ever crashes after the timeout (e.g., at 10 s) and you set the threshold to 5 s, you can’t reach safe mode without five rapid power cycles [Elektroda, p.kaczmarek2, post #20197920]

Does this bulb contain a separate LED driver board?

No. The reviewer notes that unlike other Tuya bulbs, this model drives LEDs directly from the main PCB; no secondary LED driver is present [Elektroda, ferbulous, post #20196316]

How do I add a new device profile to Cloudcutter?

An automatic offset-finder exists but sometimes fails. Steps: 1. Load the 2 MB dump, 2. Run the helper script to locate MIOT tables, 3. Submit pull-request. It currently works best on BK7231T firmware [Elektroda, p.kaczmarek2, post #20196899]

Edge case: What if the bulb is sealed with silicone—can I still open it?

You can, but expect to destroy the plastic dome. Heat the seam to 70 °C, pry slowly, and be ready to cut silicone blobs. Damage-free teardown success rate is under 30 % according to community reports [Elektroda, ferbulous, post #20196316]

How do I perform the OTA flash with Cloudcutter?

  1. Put the bulb in pairing mode.
  2. Run Cloudcutter, choose the Generic E27 A60 profile, and supply the 2 MB dump.
  3. Wait ~3 min; when finished, the bulb restarts into OpenBeken. “Three clicks and coffee time” [Elektroda, p.kaczmarek2, post #20195519]

Is the bulb compatible with Home Assistant via MQTT?

Yes. Use topics such as cmnd/a60_bulb/led_dimmer and led_basecolor_rgb. Retain is supported; publish 1 for on/off, 0–100 for dimmer. Example YAML is provided in post #20197892 [Elektroda, ferbulous, post #20197892]

How many devices does Cloudcutter currently support?

The GitHub repository lists 200+ distinct Tuya device profiles, up from 120 in 2022 [GitHub, 2023].

What happens if I toggle the wall switch very fast?

Five quick toggles still force Safe-Mode recovery unless you disabled it. Normal rapid toggling that exceeds your uptime threshold simply reboots without wiping settings [Elektroda, p.kaczmarek2, post #20197920]
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