Teardown and Flashing Guide for SYLVANIA SmartPlus A19CCECWF RGBCT Bulb
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:
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.
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:
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.
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]