Yewelink/Tuya WiFi Touch wall light switch

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dxfantome
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Re: Yewelink/Tuya WiFi Touch wall light switch

#31 Post by dxfantome » 19 May 2018, 19:53

inside
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dxfantome
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Re: Yewelink/Tuya WiFi Touch wall light switch

#32 Post by dxfantome » 19 May 2018, 20:03

the following
(resized image is better ...)
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enesbcs
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Re: Yewelink/Tuya WiFi Touch wall light switch

#33 Post by enesbcs » 19 May 2018, 20:28

dxfantome wrote:
19 May 2018, 19:52
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.

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Re: Yewelink/Tuya WiFi Touch wall light switch

#34 Post by dxfantome » 19 May 2018, 22:47

But i do not see any serial MCU on this device.
there is a world on the other side of the first pcb
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Re: Yewelink/Tuya WiFi Touch wall light switch

#35 Post by dxfantome » 02 Jun 2018, 17:02

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 :geek:
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" :D
Last edited by dxfantome on 02 Jun 2018, 21:04, edited 1 time in total.

dxfantome
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Re: Yewelink/Tuya WiFi Touch wall light switch

#36 Post by dxfantome » 02 Jun 2018, 17:26

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
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Re: Yewelink/Tuya WiFi Touch wall light switch

#37 Post by galak » 04 Jun 2018, 15:58

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
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Re: Yewelink/Tuya WiFi Touch wall light switch

#38 Post by zedd » 22 Jun 2018, 10:06

dxfantome wrote:
02 Jun 2018, 17:02

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" :D
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.

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Re: Yewelink/Tuya WiFi Touch wall light switch

#39 Post by zedd » 22 Jun 2018, 11:34

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
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IMG_20180622_111901.jpg
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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.

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Re: Yewelink/Tuya WiFi Touch wall light switch

#40 Post by zedd » 26 Jun 2018, 11:25

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

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Re: Yewelink/Tuya WiFi Touch wall light switch

#41 Post by enesbcs » 28 Jun 2018, 07:12

zedd wrote:
22 Jun 2018, 11:34
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
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Re: Yewelink/Tuya WiFi Touch wall light switch

#42 Post by Maxime28 » 15 Nov 2018, 11:58

:roll: :roll: :roll: :roll: I never heard this brand. But I like it

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