The guide examines a SYLVANIA SmartPlus A19CCECWF RGBCT bulb and its hidden Tuya/Sylvania identifiers, including Model A19CCECWF and product_id 1ijupffokexbz0cl.
A sacrificed bulb was opened, the PCB and LED package were inspected, and Cloudcutter was used to flash the device.
The bulb carries SKU 75663 for the 1-pack and SKU 75674 for the 4-pack, and the module is labeled WB8P BK7231T.
Flashing succeeded, but the device configuration reports WB3S even though the module is WB8P, leaving RGBCT tuning for another bulb.
AI summary based on the discussion. May contain errors.
I have a bunch of these and decided to sacrifice one bulb so I could use cloudcutter on the others if it all works out. I was able to successfully flash the bulb using the cloudcutter method.
Model name stamped on the base:
The model name is a bit obfuscated with this one:
Model: A19CCECWF (Printed on the base of the bulb itself, but this is nowhere to be found online or on LEDVANCE/SYLVANIA's website anywhere)
SKU: 75663 (1-pack)
SKU: 75674 (4-pack)
product_id: 1ijupffokexbz0cl (Tuya / Sylvania product identifier found with [tuya-uncover](https://github.com/blakadder/tuya-uncover))
Like all smart bulbs, they basically come apart the same way:
LED close up:
Board close up 1:
Board close up 2 (thought I needed to get the capacitors out of the way to read the flash, but not needed):
WB8P BK7231T:
Original firmware:
sylvania-s...t-bulb.bin (2 MB)You must be logged in to download this attachment.
The only thing odd is the device configuration states it is a WB3S, however, the module is a WB8P. Maybe that's actually "normal"?
I'll flash another fully functional bulb soon to try and see if I can get it dialed in with all of the RGBCT settings.
About Author
rronnander wrote 8 posts with
rating 3 , helped 2 times.
Been with us since 2024 year.
Thank you, but can you also please include a full JSON template from the Web App, so I can add this device to our list here: https://openbekeniot.github.io/webapp/devicesList.html [Read more]
Near as I can tell from comparing these boards is that the 8P has improved characteristics for antenna gain 2 dBi vs 1.2 and higher operating temp 105 'C vs 85'C with a new layout with I/O pins on 1 side... [Read more]
rronnander
09 Feb 2024 22:48
I've taken a closer look at the main chips used on the circuit board:
BP2306 - LED Driver:
https://obrazki.elektroda.pl/7614173000_1707515177_thumb.jpg
BP5628C - Dimmer:
https://obrazki.elektroda.pl/4239665500_1707515144_thumb.jpg... [Read more]
Sunnysky
09 Feb 2024 23:04
LED driver is controlled by PWM https://obrazki.elektroda.pl/6552116200_1707515767_thumb.jpg
The low side switch for regulation and buffer of current is provided by FET
https://obrazki.elektroda.pl/8613852200_1707516026_thumb.jpg... [Read more]
rronnander
10 Feb 2024 04:10
Okay, I have the following PWM mappings:
https://obrazki.elektroda.pl/4719186600_1707525839_thumb.jpg
RGB mode seems to be working well with brightness and colors. The RED seems a little miscalibrated... [Read more]
floydcohen
05 Oct 2024 03:04
Gotten a few of these, how did you get the cloudcutter to work? Can't seem to get these bulbs into slow-flashing AP mode. Just quick flashing color cycling. [Read more]
p.kaczmarek2
05 Oct 2024 07:51
Which version did you get? Maybe it's patched already.
Here are tutorials for UART flash method (check which BK7231 chip you got):
https://www.youtube.com/playlist?list=PLzbXEc2ebpH0CZDbczAXT94BuSGr... [Read more]
floydcohen
05 Oct 2024 08:56
Same model: A19CCECWF
But different SKU 75812 (4-pack)
Sylvania Wifi App shows device firmware version 1.1.4. Can't add to SmartHome/Tuya to double check firmware version.
Tried many different methods... [Read more]
rronnander
08 Oct 2024 17:39
I believe the magic number is 6 cycles. This is technically 6.5/7 cycles if you count the first power on event as a cycle. When flashing I was easily able to get each bulb into AP mode by powering the... [Read more]
ScottK
13 Dec 2024 00:34
Just joined. I can confirm that the 4 packs from Menards with this bulb still work, and still are exploitable.
I have just converted 2 of my 4 just now, using tuya-cloudcutter.
Worked perfectly, and... [Read more]
birwin88
21 Dec 2024 20:06
Thanks for the Menards tip.. I grabbed a few boxes today at $6.
I also grabbed a box of the smart plugs for $7.. I have been able to use cloudcutter on those as well. So far I don't see energy monitoring... [Read more]
birwin88
03 Jan 2025 16:52
I bought 5 boxes of these from the Menards clearance deal. I had a set of 4 bulbs from back in 2022 already outside that I was using local Tuya with. I was able to flash the 4 I already had with cloudcutter... [Read more]
byarg
08 Jan 2025 02:08
A little more info on getting these into slow blink AP mode. Rronnander's (#21251013) advice worked well for me:
When I did it, I did the off & on each less than a second, and did the initial... [Read more]
bleeblak8
10 Jan 2025 15:39
I am struggling to get these A19CCECWF Bulbs to get into Slow AP flash. I've tried so many different versions of the above.
Power on for 20 seconds, turn off and on 6 times with 1 second inbetween.
Power... [Read more]
dizzinator00
13 Jan 2025 03:49
Same issue here. Unable to get these into slow AP. Following in case someone knows a reliable method
Model: A19CCECWF
SKU: 75812 (4 pack) [Read more]
racer7
14 Jan 2025 03:51
I was able to grab four boxes of these from Menards. I've only opened two boxes so far, and here are my findings.
Box #1
Firmware v1.1.4
Unable to place into AP mode to run tuya-cloudcutter against... [Read more]
FAQ
TL;DR: For SYLVANIA A19CCECWF owners, 4 of 5 Menards boxes flashed successfully, and one user said "the magic number is 6 cycles." This FAQ shows how to enter slow-blink AP mode, use tuya-cloudcutter, and choose UART fallback when newer bulbs only quick-flash or color-cycle. [#21375154]
Why it matters: This thread identifies the exact AP-mode timing, firmware split, and BK7231T pin mapping needed to make these bulbs usable without the vendor cloud.
Variant
Reported firmware
AP mode result
Practical outcome
Older retail units
1.0.9
Slow-blink AP mode works
tuya-cloudcutter succeeded
Newer retail units
1.1.4
Often only quick-flash/color-cycle
Cloudcutter often failed
Locked-out units
Unknown
No slow AP mode
Use teardown and UART flashing
Key insight: Firmware version mattered more than the printed model. In this thread, v1.0.9 bulbs were repeatedly flashable, while multiple v1.1.4 reports could not reach slow-blinking AP mode.
Quick Facts
The bulb was identified as SYLVANIA SmartPlus A19CCECWF RGBCT, with SKU 75663 for a 1-pack, SKU 75674 for a 4-pack, and Tuya product ID 1ijupffokexbz0cl. [#20952558]
The opened bulb used a BK7231T chip on a WB8P module, even though the device configuration showed WB3S. [#20952558]
The working OpenBeken-style PWM map used P7, P8, P9, and P24, plus CTRange 154 370 to target about 2700K-6500K. [#20953963]
One board comparison claimed WB8P improves antenna gain from 1.2 dBi to 2 dBi and raises operating temperature from 85°C to 105°C versus WB3S. [#20953843]
Clearance pricing reached $6 for a 4-pack of bulbs and $7 for matching smart plugs at Menards, which made bulk flashing attractive. [#21357820]
How do you flash a SYLVANIA SmartPlus A19CCECWF RGBCT bulb with tuya-cloudcutter from AP mode?
You flash it by first forcing the bulb into slow-blinking AP mode, then running tuya-cloudcutter against a compatible profile. One user reported full success on this model and later confirmed the bulbs entered AP mode reliably after a specific power-cycle sequence. Another later report flashed all 8 bulbs with firmware v1.0.9 through cloudcutter and then moved them to ESPHome. Use the firmware-selection path if brand detection fails. [#21391865]
What is the correct power-cycle sequence to put the SYLVANIA A19CCECWF bulb into slow-blinking AP mode for cloudcutter?
The most explicit working sequence was a short-timing, 5-power-on pattern ending on a flicker. 1. Turn the bulb on and wait until it starts flashing. 2. Toggle off/on four times at about 0.5 seconds off and 0.5 seconds on. 3. On the fifth power-on, wait for a brief flicker; the bulb should then switch to slow AP flashing. If it comes on instantly at full brightness, the controller likely did not reboot. [#21391865]
Why do some A19CCECWF bulbs only quick-flash or color-cycle instead of entering slow AP mode?
Some bulbs appear to ship with firmware or behavior that prevents slow AP mode from appearing. The clearest thread evidence is that several bulbs on firmware 1.1.4 only quick-flashed or color-cycled, while v1.0.9 units entered AP mode and flashed successfully. One later user also suspected the AP path may lock out after inconsistent power cycling, because bulbs that initially failed never returned to slow blink. [#21391865]
What differences were reported between firmware v1.0.9 and v1.1.4 on SYLVANIA A19CCECWF bulbs when trying to use tuya-cloudcutter?
Firmware v1.0.9 was reported as flashable, while v1.1.4 was repeatedly reported as resistant to AP-mode entry. In one side-by-side report, a box with v1.0.9 entered slow AP mode and flashed successfully using the profile "1.0.9 - BK7231T / oem_bk7231s_light_sp_mix4to5_db." A second box with v1.1.4 could not be put into AP mode, and both tuya-cloudcutter and tuya-convert failed. [#21391865]
How do you configure the PWM pins for the BK7231T/WB8P inside the SYLVANIA SmartPlus A19CCECWF so RGB and white modes work correctly?
Use PWM on pins 7, 8, 9, and 24, then enable the two LED flags that fix white-mode behavior. The working map was P7=PWM1, P8=PWM2, P9=PWM3, and P24=PWM5. The thread also enabled Flag 8 for alternate CW light mode and Flag 24 to emulate cool white with RGB plus warm. That combination made RGB mode and white mode both work acceptably on the BK7231T/WB8P bulb. [#20953963]
What CTRange setting was used to get the SYLVANIA A19CCECWF bulb to the proper 2700K-6500K color temperature range?
The thread used CTRange 154 370 to match the bulb to roughly 2700K-6500K. That setting was posted after the RGB channels were already working and was specifically described as the proper color range. Before the final flag changes, the temperature slider acted more like a second brightness control and stayed near a stock-looking 2700K. [#20953963]
Why does the OpenBeken or device configuration show WB3S when the bulb module is actually marked WB8P?
The thread suggests this can be normal because WB8P may be a later hardware revision compatible with earlier WB3S-oriented configuration data. One reply compared the modules and described WB8P as having 2 dBi antenna gain instead of 1.2 dBi, a 105°C rating instead of 85°C, and a revised pin layout. The same reply concluded that manufacturers may keep major compatibility while changing module revisions. [#20953843]
What are the BP2306, BP5628C, and KP15051SPA chips doing on the SYLVANIA A19CCECWF bulb board?
BP2306 is the LED driver, BP5628C is the dimmer, and KP15051SPA handles power distribution on this board. A follow-up comment added that the LED driver is PWM-controlled and uses a low-side FET for current regulation and buffering, with PWM current sensing support. Those three parts explain why the bulb needs both power-stage control and separate channel dimming for RGB and white output. [#20953869]
What is tuya-cloudcutter, and how is it used to exploit compatible Tuya-based smart bulbs without opening them?
"Tuya-cloudcutter" is a software flashing tool that exploits compatible Tuya devices over Wi-Fi, without opening the device, by using the bulb's AP pairing mode and loading replacement firmware. In this thread, users used it by putting the bulb into slow-blinking AP mode, then selecting a matching BK7231T firmware profile. One user confirmed the original A19CCECWF bulbs flashed successfully that way, while newer firmware sometimes blocked the process. [#20952558]
What is AP mode on a Tuya smart bulb, and how can you tell the difference between slow-blink AP mode and normal fast flashing?
"AP mode" is a Wi-Fi pairing state that makes a Tuya bulb broadcast for direct setup, and its key sign is a slow blink rather than the bulb's normal fast flashing or color-cycling behavior. In this thread, slow blink was the required state for cloudcutter. Fast flashing meant the bulb was not in the needed mode, and one quoted instruction said to power-cycle three more times if a bulb blinked quickly instead of slowly. [#21255509]
How does UART flashing work on BK7231T bulbs like the SYLVANIA A19CCECWF when cloudcutter fails?
UART flashing is the thread's main fallback when the bulb will not enter AP mode. "UART flashing" is a wired recovery method that talks directly to the BK7231T serial interface, requires opening the bulb, and bypasses AP-mode dependence. The thread explicitly pointed stuck users to BK7231 UART tutorials and advised checking which BK7231 variant the bulb contains first. Another user with the diffuser removed said the EN pin was physically hard to reach, which is the main mechanical downside. [#21250984]
What ESPHome configuration works for the SYLVANIA SmartPlus A19CCECWF RGBCT bulb after flashing a BK7231T module?
A working ESPHome setup used bk72xx with generic-bk7231t-qfn32-tuya and mapped PWM outputs to P8 green, P9 blue, P7 red, and P24 white. The posted YAML then exposed the lamp as an rgbw light with color_interlock: true, plus Random and Flicker effects. The same report said all 8 v1.0.9 bulbs flashed through cloudcutter first and then ran this ESPHome configuration successfully. [#21391865]
OpenBeken vs ESPHome for the SYLVANIA A19CCECWF bulb — which is better for RGBW/RGBCW control and setup?
OpenBeken looked better for initial pin discovery, while ESPHome was the confirmed end-state for at least one large batch. The thread first solved PWM mapping, flags, and CTRange 154 370 in an OpenBeken-style workflow. Later, a user who flashed 8 bulbs on v1.0.9 said ESPHome worked on all of them with a clean BK7231T YAML. Pick OpenBeken for fast hardware bring-up, then ESPHome if you want an integrated Home Assistant setup. [#21391865]
Why does the red channel look miscalibrated or turn pink on this SYLVANIA RGBCT bulb, and how can you tune it?
The red channel looked pink because the initial PWM and white-emulation setup was not fully tuned. The thread reported a narrow sweet spot for deep red, after which the color picker quickly shifted toward pink, while other colors stayed fairly calibrated. The practical fix was to refine the PWM mapping and then enable Flag 8 and Flag 24, which improved overall mode behavior. Exact red-channel calibration values were not finalized in the thread. [#20953963]
What's the most reliable fallback method for A19CCECWF bulbs that seem locked out of AP mode and won't respond to the usual power-cycle tricks?
The most reliable fallback is teardown plus UART flashing of the BK7231T module. Several later posts showed that some bulbs, especially certain 75812 4-packs or v1.1.4 units, would not enter slow AP mode despite many 10-second, 20-second, or 6-cycle attempts. One user flashed 20 bulbs successfully overall but still found one full box where none of the bulbs would enter AP mode, making a wired method the safest recovery path. [#21375154]
AI summary based on the discussion. May contain errors.
Comments
Thank you, but can you also please include a full JSON template from the Web App, so I can add this device to our list here: https://openbekeniot.github.io/webapp/devicesList.html [Read more]
Here's the JSON: { "vendor": "SYLVANIA", "bDetailed": "0", "name": "SYLVANIA SmartPlus A19CCECWF RGBCT Bulb", ... [Read more]
Near as I can tell from comparing these boards is that the 8P has improved characteristics for antenna gain 2 dBi vs 1.2 and higher operating temp 105 'C vs 85'C with a new layout with I/O pins on 1 side... [Read more]
I've taken a closer look at the main chips used on the circuit board: BP2306 - LED Driver: https://obrazki.elektroda.pl/7614173000_1707515177_thumb.jpg BP5628C - Dimmer: https://obrazki.elektroda.pl/4239665500_1707515144_thumb.jpg... [Read more]
LED driver is controlled by PWM https://obrazki.elektroda.pl/6552116200_1707515767_thumb.jpg The low side switch for regulation and buffer of current is provided by FET https://obrazki.elektroda.pl/8613852200_1707516026_thumb.jpg... [Read more]
Okay, I have the following PWM mappings: https://obrazki.elektroda.pl/4719186600_1707525839_thumb.jpg RGB mode seems to be working well with brightness and colors. The RED seems a little miscalibrated... [Read more]
Gotten a few of these, how did you get the cloudcutter to work? Can't seem to get these bulbs into slow-flashing AP mode. Just quick flashing color cycling. [Read more]
Which version did you get? Maybe it's patched already. Here are tutorials for UART flash method (check which BK7231 chip you got): https://www.youtube.com/playlist?list=PLzbXEc2ebpH0CZDbczAXT94BuSGr... [Read more]
Same model: A19CCECWF But different SKU 75812 (4-pack) Sylvania Wifi App shows device firmware version 1.1.4. Can't add to SmartHome/Tuya to double check firmware version. Tried many different methods... [Read more]
I believe the magic number is 6 cycles. This is technically 6.5/7 cycles if you count the first power on event as a cycle. When flashing I was easily able to get each bulb into AP mode by powering the... [Read more]
Just joined. I can confirm that the 4 packs from Menards with this bulb still work, and still are exploitable. I have just converted 2 of my 4 just now, using tuya-cloudcutter. Worked perfectly, and... [Read more]
Thanks for the Menards tip.. I grabbed a few boxes today at $6. I also grabbed a box of the smart plugs for $7.. I have been able to use cloudcutter on those as well. So far I don't see energy monitoring... [Read more]
I bought 5 boxes of these from the Menards clearance deal. I had a set of 4 bulbs from back in 2022 already outside that I was using local Tuya with. I was able to flash the 4 I already had with cloudcutter... [Read more]
A little more info on getting these into slow blink AP mode. Rronnander's (#21251013) advice worked well for me: When I did it, I did the off & on each less than a second, and did the initial... [Read more]
I am struggling to get these A19CCECWF Bulbs to get into Slow AP flash. I've tried so many different versions of the above. Power on for 20 seconds, turn off and on 6 times with 1 second inbetween. Power... [Read more]
Same issue here. Unable to get these into slow AP. Following in case someone knows a reliable method Model: A19CCECWF SKU: 75812 (4 pack) [Read more]
I was able to grab four boxes of these from Menards. I've only opened two boxes so far, and here are my findings. Box #1 Firmware v1.1.4 Unable to place into AP mode to run tuya-cloudcutter against... [Read more]