Teardown & Flashing Guide: BK7231N LSC 200 LED Multicolor Smart Light GP-SWXXXDCXXXX(EU)-1C Plug

Teardown of GP-SWXXXDCXXXX(EU)-1C plug
Internally it has an vertically mounted wifi board with tuya and a BK7231N

You can push the the cover (where the led strip is connected to) pretty easily up to open the electronic compartment

Pull out the pcb by grabbing it with a plier

Was able to flash the chip with

sometimes i had to pull down CEN to get a bus

when you are getting "WriteSector 1 failed" try another usbttl converter
with my first one i constantly got the errors

module configuration is currently unknown, help is appreciated

Hello, I will try to help you, can you please provide some more information what kind of IC is used for this device? Your teardown lacks this crucial information currently. Is it some kind of WS2812b device?
Is device able to display multiple colors at the same time (on multiple LEDs, of course)?

hey, thanks for your reply

the ic is the BK7231N or what do you need?

i made a picture of the wifi/control board during flash


on the back are no more components, just some breakout solder points

as far as i understood this light strip with only one single color (but that you can choose) for all
but, as i never tried, i can't really tell
i don't think it's a ws2812* device as comunication is only via +6v and/or -6v
there are only two connector pins to the strip

I found this, it is ESP version, but the rest might be the same

yes, that was the reason why i brought it
but i was unable to flash tasmota, so i dig deeper
and that was the result here

This is indeed a useful information. I will look into that tomorrow in detail.

Are you saying that this device used to be based on ESP8266 (85?), and now is using Beken?

It looks like.
But it would be nothing new, there are many templates for Tasmota which say "this device is now being shipped with Beken MCU".

So you think it's fair to say that there is a trend of migration from ESP to BK?

Well, don't worry, I got it covered. From what I've seen, it indeed requires a custom driver. I will try to port that one soon. Please wait, let's hope, a day or so... but I am not sure right now how hard can it be.

By the way, here are further device specs:

Model	GP-SWXXXDCXXXX(EU)-1C,IP20 SERIES,GP-SWXXXDCXXXX-IP44(EU)-1C,IP44 SERIES
Physical dimension	L x W x H : 113.5mmx 42mmx42 mm
Input voltage	100-240V~
Input frequency	50-60Hz
Output voltage	3-42VDC
Output current	20-1200mA
Output Power	6W Max
Special function	OCP,SCP
HIPOT Testing	3000Vac/5mA/Min
AC pin type	EU
Mean time between failures	50,000 HOURS AT FULL LOAD AND 25°C AMBIENT
Application	LED Driver
Safety certification	EN 61347-2-13:2014+A1:2017;EN 61347-2-11:2001;EN 61347-1:2015;EN 62493:2015
Safety regulations and Electromagnetic interference standards	EN 55015:2013+A1:2015;EN 61547:2009;EN 61000-3-2:2014;EN 61000-3-3:2013
Energy efficiency standards	VI
Protection index	IP20-IP44(Indoor/Outdoor use)
Burn-in	100% Full Load Burn in
Operating temperature	-20~40℃
8 functions	1.COMB 2.IN WAVES 3.SEQUENTIAL 4.SLO-GLO 5.CHASING/FLASH 6.SLOW FADE 7.TWINKLE/FLASH 8.STEADY ON
Timing	Perform free setting for 0-24 hours
Dimming	Four Dimmer:100%、75%、50% 、25%

thanks for helping me out with that
if you need some help with testing, just give me a ping

p.kaczmarek2 wrote:

So you think it's fair to say that there is a trend of migration from ESP to BK?

I would say so. Copy and paste this to Google:


and it will show around 1020 results (there might me some duplicates).