TYWE3S With different pinout

[Darozas]

Hi All

After 3 weeks without sleep finaly managed to get this unit to work.

Any one that struggling to flash TYW3S with any flasher existing on earth. Note its not flasher its TYW3S that have completely different pinout.

Now got my Light switches Tazmotised nice !!!

Pleases see below.

Regards

[sfromis]

Is that a photo of your module? It would appear not.... Where did you find it?

There may be similar form factor modules which are not actually TYWE3S, just appearing to be similar?

[Darozas]

I purchased switches on ebay and they came with TYWE3S chips that i could not flash using existing pinouts after 3 weeks i took steel shell off and traced pins that was completely different to all available pinouts. And i have seen loads of post that people cant flash these chips this could be the reason that Tuya changed pinout on purpose to stop replacements.

Picture attached is pinout on my module to be able flash it successfully.

Hopefully this will help alot of people go round in circles

[Darozas]

I have managed to swap TYWE3S with ESP12F by cutting trace on pad 4(esp12F GPOI0) and remapped to different pin as pin4 is not GP0i0 on TYWE3S

[joewiatyahoodotcom]

Thanks for this! I just resurrected 2 Tuyas from the trash - I couldn't flash them and tossed them - so I'll try your pinout sometime this week.

[Darozas]

Glad it helped. Led me know how did u get on!!

Flashi it dont botther replacing chip as original chip works just fine

[Skrucz]

Thanks @Darozas for your astonish sacrifice. I'm just trying to imagine what it must have felt like when you figured out the connections. Your discovery today blown my mind and save my nerves!
I've attached your picture with described other pins. It's a shame that the buttons only return a falling edge transition but still nice wall switch for good price.

[Spp595]

I don't know what I'm doing wrong, but my device is not flashing. I soldered everything right rx To tx a tx To rx. when I press the install button I close ground and gpio0 but the program writes that I need to close them during loading.

[sfromis]

You have to ground gpio0 before/while applying power.

[Spp595]

Вы должны заземлить gpio0 до/во время подачи питания.

then the device becomes inaccessible and not even displayed while in tty

[Spp595]

Вы должны заземлить gpio0 до/во время подачи питания.

then the device becomes inaccessible and not even displayed while in tty

I made a mistake, it shows up but it still doesn't change anything

[Spp595]

Solved, it turns out that the esp8266 that I used as a usb bridge was flashed by esphome. I connected the switch to the programmer and everything worked.

[Spp595]

again I come back here) I can not find a suitable template for my 2 gang no neutral switch

[Darozas]

i got as this dont remember which is which try both.

[sfromis]

You can often explore pins, especially for simple switch/relay devices.
https://tasmota.github.io/docs/Configuration-Procedure-for-New-Devices/

Different 2 gang devices will very often differ when it comes to pin assignment.

[Spp595]

This template came up {"NAME":"Wall Switch 2C","GPIO":[289,288,1,32,33,0,0,0,0,224,225,0,0,0],"FLAG":0,"BASE":28} , but there are still difficulties with it. If you turn on both switches at the same time, you cannot turn them off by pressing them, you can only use the web interface.
https://user-images.githubusercontent.com/104263581/225003516-e6bf9bb6-9dd3-425a-b9bf-c326619dd364.mp4

[zmaxb]

@Darozas Thanks buddy you saved my nerves! I tried to flash for a day on the pins from the official datasheets

[alecsandes]

Dears, please help.
Trying to flash on Tywe3s

it cannot be flashed.
I bridge GPIO0 with gnd before powering up
I release the bridge
I start the flasher

I tried also to bridge RST with GND while flashing, nothing

[Darozas]

Try to solder it as per pinout above.ignore writings on board.
Keep vcc and gnd as you have

[alecsandes]

Tried, didn't work ...
guess, i'm gonna throw them away

[sfromis]

To flash ESP-12 (or compatible modules like TYWE3S), you generally need to ground gpio 15, and connect EN/CH_PD to vcc. These connections are typically on the main PCB, but not if you flash the module separately.

[alecsandes]

I think I am gonna renounce ...
I have tried the different configurations posted here ... nothing works ... I have opened the cover and found that the controller is 8266EX In fact and it is very hard for me to follow the wiring to check whether the markings are coinciding with the real pinout or not.

Isn;t there an easier way to flash these shits? I can make it work in tuya local as I had it in the past, but I really want it off the tuya fw, so I can access it any time I change some wifi setting ...

[sognetic]

Hi, I have the exact same module (YDM_WIFI_SV7) and ran into the same problem (flashing [esphome in my case] doesn't work when detaching the board). I did, however, discover that flashing does work when plugging the board back into the dimmer (i.e. the boards with all the mains stuff). Everything still powered from the FTDI serial converter, no mains!

The board does connect to wifi, but unfortunately I'm now stuck because the Tuya MCU module won't initialize (I think maybe because it's actually a different MCU, a Puya PY32). I'd be curious if Tasmota has the same issues. Do you still have the board and could try this, @alecsandes ?

[protectivedad]

Just a heads up I received one of the US two gang touch switches (top-bottom, not side-by-side). It had the TYWE3S module. Just a silver plate no markings. I tried the real connections no go. The connections mentioned here and still no go. I removed the board board tried again. Eventually after removing the cover I found, it had the serial connections of the new with the gpio0 of the old. So to save everyone the hassle I thought I mention it here.