Yewelink/Tuya WiFi Touch wall light switch

[countcobolt]

Heyhey

can you confirm that this EU version works? I would like to set up these as simple "dummy" switches (basically set the switch for another Sonoff switch)

Kind regards

Steve

[NDR008]

That would be nice - me too.

[NDR008]

Actually, I am just wondering, ESP's were first used by people over UART with ARDUINOs in the early days before unlocking its own MCU capability.
I guess these PIC based devices are following the same approach.

Couldn't we just cut the trace to the pic, and wire the GPIO of the ESP directly to the relay instead?

[enesbcs]

Couldn't we just cut the trace to the pic, and wire the GPIO of the ESP directly to the relay instead?

I think it can be done, but VDD and signal level is usually not designed to be 3V3 on the other components in these cases. (MCU working at 2.6V and the Touch switches wired directly to it, Relays works at 12V..)
I'am not so confident with the soldering iron, so if a problem can be solved in software, i prefer it.

[barrymossel]

And two other potential clones:
https://www.banggood.com/1-Gang-1-WIFI- ... 16178.html (uses the app from Tuya as you can see in the description).
https://aliexpress.com/item/WiFi-Switch ... 67947.html (uses YeWeLink app)

[enesbcs]

And two other potential clones:
https://www.banggood.com/1-Gang-1-WIFI- ... 16178.html (uses the app from Tuya as you can see in the description).
https://aliexpress.com/item/WiFi-Switch ... 67947.html (uses YeWeLink app)

The first one seems to be the same S1W-1 that i bought and using in my pantry with ESPEasy+P169. The second one seems to be a little different, but as the description mentions yewelink app, that should be compatible also. Anyway, after the Sonoff T1 arrived, and there are a very little difference in prices, i rather choose 2gang Sonoff T1 devices in the future, as they are easier to flash.

[barrymossel]

The first one seems to be the same S1W-1 that i bought and using in my pantry with ESPEasy+P169. The second one seems to be a little different, but as the description mentions yewelink app, that should be compatible also. Anyway, after the Sonoff T1 arrived, and there are a very little difference in prices, i rather choose 2gang Sonoff T1 devices in the future, as they are easier to flash.

Sure, they are easier to flash, but also less attractive in my opinion. I really do not like the logo and blue accents when no led is turned on. Is it possible to exchange out those front panels anyway?

[barrymossel]

And two other potential clones:
https://www.banggood.com/1-Gang-1-WIFI- ... 16178.html (uses the app from Tuya as you can see in the description).
https://aliexpress.com/item/WiFi-Switch ... 67947.html (uses YeWeLink app)

The both are identical except for the print on the glass. GPIO4 is connected to the relay. The button is connected to a CRS02A chip, which is connected to Rx of the ESP.

And how would I continue now? Any help?

[enesbcs]

The both are identical except for the print on the glass. GPIO4 is connected to the relay. The button is connected to a CRS02A chip, which is connected to Rx of the ESP.
And how would I continue now? Any help?

I assume this is a one button version. CRS02A is a simple schottky diode, so you can use RX as a simple GPIO-3 after setting it in ESPEasy:
Tools->Advanced->Enable serial port (check box unticked - so disable!)
Tools->Advanced->Serial log level: None
And of course enable "Rules" in Advanced.

Now you can set up things according to the Sonoff Touch Rules:
https://www.letscontrolit.com/wiki/inde ... noff_Touch
Just replace GPIO numbers.
touch: 3 instead 0
relay: 4 instead 12

If RX does not hold state, and works like a push button, you can use for example a Dummy variable to hold a state, or any likable solution.

[barrymossel]

The both are identical except for the print on the glass. GPIO4 is connected to the relay. The button is connected to a CRS02A chip, which is connected to Rx of the ESP.
And how would I continue now? Any help?

I assume this is a one button version. CRS02A is a simple schottky diode, so you can use RX as a simple GPIO-3 after setting it in ESPEasy:
Tools->Advanced->Enable serial port (check box unticked - so disable!)
Tools->Advanced->Serial log level: None
And of course enable "Rules" in Advanced.

Now you can set up things according to the Sonoff Touch Rules:
https://www.letscontrolit.com/wiki/inde ... noff_Touch
Just replace GPIO numbers.
touch: 3 instead 0
relay: 4 instead 12

Will try this weekend. But I also have the two button version. Should I do the same with that one?

[enesbcs]

Will try this weekend. But I also have the two button version. Should I do the same with that one?

I doubt that the two button version also works with a simple diode. It has to be:
1/ a smarter MCU with an own program and RX+TX communication,
viewtopic.php?p=26321#p25988

2/ or two separated GPIO for the two buttons, which is easy.

[barrymossel]

Didn't measure the two button yet. Will do that later.

[vandalon]

I've found another potential Tuya clone.
Currently i do not have this yet, but it's mobile app (named "Jinvoo Smart") contains evidence that it is licensed from Tuya, such as the previous "Yewelink" WiFi touch light switch.
https://www.ebay.com/itm/New-EU-Type-2- ... 2572146126

Did you ever test this one, and if so, can you confirm if it works and tell me where the ground/3v/tx/rx pins are?

[enesbcs]

Did you ever test this one, and if so, can you confirm if it works and tell me where the ground/3v/tx/rx pins are?

Sorry, since the Sonoff T1 EU version arrived, i do not buy any other type.

[vandalon]

I understand . I don't like the looks very much of the sonoff though.

[dxfantome]

Hello
Where is your research on this type of material?
I am very interested in the subject :
pin, protocol between the MCU and the esp etc ...
possible flashing? espeasy?
I share tonight information that I have for the moment. picture of my model etc.
I think we all want to be able to make it work with our own home automation server (domoticz, openhab or other).

ps: still sorry for my english, i'm french, and i'm using an automatic translator

[enesbcs]

Where is your research on this type of material?
I am very interested in the subject :
pin, protocol between the MCU and the esp etc ...
possible flashing? espeasy?

I've tested two Tuya compatible model [1] [2], but there are several more, that i don't i do not have, and you only know if it is compatible, when you buy it, and try... the Tuya serial API is documented (between the MCU and the ESP), and the necessary ESPEasy plugin P165 can be found on the Playground repository, precompiled binaries also attached to the first forum entry.
But i'll warn you: IF A WIFI SWITCH IS TUYA COMPATIBLE IT IS NOT NECESSARILY SERIAL DRIVEN, IT IS AN OPTION! There are some Tuya recommendation about direct ESP GPIO controlling without an MCU, but if it has an MCU and the mobile application refers to "Tuya" somehow, than the Tuya serial API should work.

[dxfantome]

So I will post here my investigations (or create a new post?) Since this seems to me in the context of your work.
Here is my model:
compatible tuya
dimmer
3 buttons (+, on / off, -)
equipped with an ESP8266MOD
bought less than 15 € (postage included)

[dxfantome]

face led touch

[dxfantome]

inside

[dxfantome]

inside

[dxfantome]

the following
(resized image is better ...)

[enesbcs]

inside

Nice! The four pins on the left side i think will be the VCC-RX-TX-GND, started with the sqaured one.
But i do not see any serial MCU on this device.

[dxfantome]

But i do not see any serial MCU on this device.

there is a world on the other side of the first pcb

[dxfantome]

I see one "CR302 B751T004BG" ??? what's this ?
and
I see one "8S103F3P6" :
this is 8bit MCU STM8S in tssop20 case
http://www.st.com/content/ccc/resource/ ... 226640.pdf

the four pin with the one square is not VCC-RX-TX-GND
is not connected to esp8266mod but is just connected to MCU
is VCC- SWIM-GND-NRST
the pin SWIN (Single Wire Interface Module) is communication protocol and debug module
http://www.st.com/content/ccc/resource/ ... 173911.pdf

the pin 21(U0RXD ) of ESP8266mod is connected to pin 2(UART1_TX) of MCU
the pin 22(U0TXD ) of ESP8266mod is connected to pin3(UART1_TX) of MCU

So even if the components and the jtag are not exactly the same, it seems that the logic remains the same. a esp8266 that manages only the wifi and communicates via tx rx has an MCU that manages all the hardware. it remains to be supossed that on Tx Rx transits the game of classic command of "tuya"

[dxfantome]

no esp8266 pin is connected to the strange chip "cr302 ..."
hte pin 18 of esp8266mod is connected to MCU 8S103F3P6 pin 1 (UART1_CK)
no another pin of esp is connected to the mcu, nor to the various jtag

[galak]

Did you have any issues flashing. I'm trying to figure out how things work since the microcontroller is also connected to the ESP8266 uart line RX/TX pins, you'd end up having multiple devices possibly driving those pins.

[zedd]

the pin 21(U0RXD ) of ESP8266mod is connected to pin 2(UART1_TX) of MCU
the pin 22(U0TXD ) of ESP8266mod is connected to pin3(UART1_TX) of MCU

So even if the components and the jtag are not exactly the same, it seems that the logic remains the same. a esp8266 that manages only the wifi and communicates via tx rx has an MCU that manages all the hardware. it remains to be supossed that on Tx Rx transits the game of classic command of "tuya"

Sounds logical to me, as it has to control three seperate dimmers.
Anyone got this flashed yet? I think we might have to connect to the esp pins directly to get thing working.
I’m a little worried about we’ll control the dimmers through espeasy, but let’s get it flashed first.

[zedd]

So, I was able to flash this anonymous dimmer, only to discover the default ESPEasy does not work. Flashing did work however.
I had to make the connections to the ESP manually "by hand", as you can see in the photo's.

IMG_20180622_111910.jpg (647.23 KiB) Viewed 639932 times

IMG_20180622_111901.jpg (862.59 KiB) Viewed 639932 times

Not easy and you have to keep your hand really steady, but it worked. You can't really see, but I'm holding two pins (RX and TX). The yellow wire holds GPIO0 down.
Sorry for using similar colors, they don't come out right in the photo. Wiring is as follows:
- Brown = GDN
- Bright yellow = VCC 3.3V (next to brown)
- Darker yellow = GPIO0, attached to GND
- Red - TXD
- Green - RXD

I flashed the standard ESPEasy_R120_4096.bin, which did not work and ESPEasy_Mega_P165_4M_1MS_lwip20 from this discussion. Neither caused the ESP_-access point to show.
Reattaching the board to the rest of the device make all LEDs light up - it knows somethings wrong !
Will try more later.

[zedd]

OK, so a neighboring project is a little ahead of us here: https://github.com/arendst/Sonoff-Tasmota/issues/469

[enesbcs]

I flashed the standard ESPEasy_R120_4096.bin, which did not work and ESPEasy_Mega_P165_4M_1MS_lwip20 from this discussion. Neither caused the ESP_-access point to show.
Reattaching the board to the rest of the device make all LEDs light up - it knows somethings wrong !
Will try more later.

The neighboring project uses 1M firmware with no SPIFFS, and esptool with "dout" mode, i suppose you did not.

[Maxime28]

I never heard this brand. But I like it

[adhossain]

I flashed the standard ESPEasy_R120_4096.bin, which did not work and ESPEasy_Mega_P165_4M_1MS_lwip20 from this discussion. Neither caused the ESP_-access point to show.
Reattaching the board to the rest of the device make all LEDs light up - it knows somethings wrong !
Will try more later.

The neighboring project uses 1M firmware with no SPIFFS, and esptool with "dout" mode, i suppose you did not.

I got this similar device today but unfortunately I cannot get it into reset mode to pair with phone app. So I decided, if I can flash it with different firmware and found this post.

Did you guys able to flash it and get it worked? If so, how.

By the way, the

CR302 B751T004BG

is a capacitaive touch IC

[alifarooq]

Hello All, Need help regarding Tuya 4 gang Wifi Touch Wall light switch.

It has TYWE3S with esp8266 wifi chip. It also has MCU. I want to reprogram it and want to use it in home assistant. I also attaching its board view. Does anybody have its schematic or GPIO function list or some helpful material?

Also what is the IC number of MCU?