[BK7231N/T34] TW2-0001A -Bingoelec DIY Series Smart WiFi Wall Touch Switch Base

Hello,

I recently started doing the lighting in my home and came across different versions of WiFi switches.
I bought the following: https://www.aliexpress.com/item/1005005221570334.html which turned out to be Bingoelec T34 modules, and came with bingoelec tape on the package.

The actual wifi DIY module is this: https://www.aliexpress.com/item/1005004526708666.html

Here are some pictures of the module:


I did not want to reverse engineer the board so that I can flash it, but I tried and successfully flashed them with cloudcutter.

Cloud Cutter option: 1.1.0 - BK7231N / oem_bk7231n_dctrl_switch

Here is the config dump I made for the 1-Gang where Toggle 0 is the integrated relay and Toggle 1 is the backlight of the switch.

Quote:

{
"vendor": "Tuya",
"bDetailed": "0",
"name": "Bingoelec DIY Series Smart WiFi Wall Touch Switch Base",
"model": "DIY Series Smart WiFi Wall Touch Switch",
"chip": "BK7231N",
"board": "TW2-0001A",
"flags": "1024",
"keywords": [
"Bingoelec",
"DAJIMEI",
"T34",
"TW2-0001A"
],
"pins": {
"17": "Rel;0",
"20": "WifiLED_n;0",
"24": "Rel_n;1",
"28": "Btn;0"
},
"command": "",
"image": "https://obrazki.elektroda.pl/8186154900_1682756167.jpg",
"wiki": "https://www.elektroda.com/rtvforum/topic3974861.html"
}

I don't have and don't need 2 and 3 gang modules, so I cannot provide pin configuration for them. If anyone is willing to provide the config feel free to reply to this thread.

Thanks. Actually, your module seem to have GPIO routed out for relay 2 and relay 3, so you should be easily able to check the GPIO required for Relay 2 and Relay 3 in the multi-gang modules, if you want, but that's not required.

The template has been added.

Yes, but the buttons are not routed, so I would prefer someone with the multi-gang module to check them.

I have a 2-gang switch Bingoelec T34. What do you need to check on it to create a template? I have no skills in electronics

Here is an easy way to get GPIO template:

Managed to flash it with libretiny ESPHome and it works like a dream, so I don't really need a new profile for CloudCutter.

my esphome yaml for 2 gang switch:

1/2/3 gang bingoelec diy switch modules use the same chipset T34 FW version 1.1.0 (as 1 and 2 gang), so easy to flash it with esp home/libretiny, but 4 gang I believe it uses a different chip as fw is 1.0.6 and there's no mark with T34 on the board and due to touch buttons can't see anything.
Some data from tuya cloud for 4 gang (maybe someone will manage to identify the chip based on this data):
"product_id": "vinqmcfbtepzjbw7"
"product_name": "四路开关（WIFI+BLE）"
"name": "4G Wifi Switch(WIFI+BLE)"
"category": "kg"

Also found that BSEED switches use the same diy switch modules: https://www.bseed.com/collections/wifi-light-switch
So if anyone is willing to create profiles for these... I don't have the knowledge to do it myself
They seem to be very popular in the UK

Can you post pictures of the internals for 4 gang switch?

The board can be removed from the power supply part. The microcontroller is on the other side. You can disassemble it and identify the controller.

no luck finding the chip... it might be on the other side of the internal board. there are two versions though (first pic is from another switch bought from the same supplier 1 week before the second one but atm i don't have access to it to check the back of the board - it is installed at a different location)...

Are you sure it's a WiFi version?

Of course.

Can you give overview pictures of the module that has the buttons on it? Front and Back. Most of the pictures you gave seem to be of the power supply side which we are currently not that interested in

One pic is from the front panel (the one with touch buttons) and one from the power supply. I'll take some better pictures later in the evening though.


Added after 8 [hours] 8 [minutes]:

Sorry for the late reply, but I have noticed that you sent photos. Looking at where the WiFi antenna cable is going, I believe that the actual microcontroller is on the power board on the back. As far as I can see from the traces on the board with the buttons, there are just the buttons, the controller that takes the signal from them, and the WiFi antenna. So I would guess that the actual microcontroller is on the back of the internal board.

I'll try to remove the switch and reveal the microcontroller once I get back home somewhere around 1st of Nov.

This is one of the two Bseed 4Gang I have. Microcontroller is T34 so easy to flash with ESPhome (chosen fw 1.2.1 dctrl switch in cloudcutter)
Working like a charm
The other one I'll dismantle it to identify the microcontroller when I'll be at the location where it is installed (pics posted in previous posts)

ESPhome yaml (for 4gang with T34 microcontroller):

Hi guys, this is Tangwo Electric Technology Co., Ltd, manufacturer of smart switches and sockets from China. Bseed and Bingoelec smart switches are the same, both manufactured by our factory. Have you seen the letter TW on the chip? It's the abbreviation of Tangwo.
So, any assistance needed from us? You can reach us at email: sale02(_at_)tangwoia.com or WhatsApp: 0086-18969742816.

@alan807571 would you be able to provide T34, BK7231N or TW module datasheet here?