Unkown tuya chip

Hardware
287

On the workbench it worked. But returning it to the facility is as if there is no pulse.
The installation is as it was before tasmotizing. I have measured in the connection of the Moes and between N and Siwtch there is 110v. Once pressed 220v.
I also know that the switch “reads it” because when I do several on/off it emits beeps
Any indication?

I answer myself in part:
I have tasmotized another switch very similar to the Moes MS104. I don’t know what model it is. But electronics is very similar, not the same.
It looks the same as the one in the PDF I mentioned a few days ago, but I remember that this is not Moes.
I have put an ESP8266 just like with the same process as the Moes.
In the Tasmota console I have configured GPIO12 with Relay and GPIO13 as button.
Connected and running!
From what I understand that this configuration works only with the web switch (relay). You have to find the configuration to make the Moes MS-104 work with the relay and switch!
Thanks for the help!

288

Thanks for trying, trouble with aftermarket/open source firmware is you have to reverse engineer and re-implement all the required functions according the the coding standards of the new platform whether it’s esphome or tasmota I’m having similar issues with shelly dimmer 2 which was working fine using older firmware now the push switch does not respond also trying to figure out all the tuya codes for a Skydance S1-B(WT). Helps to have the right tools like a multimeter or oscilloscope and also reading serial data and checking the unit against the original firmware

289

Is it possible on a Moes M104-B (2 switch) to replace the WA2 by a tywe2s as a direct replacement without other modifications ?

290

Hi guys, something’s odd about this one, gpio02 is for the esp12 blue led, so this leaves only tx & rx pins.
Also swapped with esp12f & esp12s but I still can’t get button 2 to work if I assign gpio01 or gpio03

I swapped back the wb3s chip (beken) and button 2 works just fine which rules out if i accidently severed any connection when i was desoldering it.

Any thoughts on this?

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Solved, it wasn’t tx/rx pins, i needed to assign ADC as button 2

291

Well, I managed to tasmotize the ones that weren’t ms-104. Once the chip and firmware were changed, it worked the first time.
The MS-104 I have not been able to make them work. Neither with pulses, nor anything… :frowning:

292

You do not need to replace the chips anymore. You can use https://github.com/openshwprojects/OpenBK7231T_App to OpenBekenize the new WB3S, WB2S, WB2L, etc chips. The flashing of the new chip as easy as using Tasmota on ESP chips. I have done this for an AU Deta Smart Double Power Point 6922HA. https://www.elektroda.com/rtvforum/viewtopic.php?p=20087146#20087146

3 Likes
294

Manual for what?

295

Very nice!

I’ve just bought the same module. Instead of transplanting an ESP module, I flashed the original WB2S module with OpenBK7231T.

What annoys me is that when I operate the switch, it takes some time for the module to receive the pulse. Does it happen with yours, too?

296

No. Mine is pretty instantaneous

1 Like
297

I wrote up a guide on how to flash the new Tuya DETA Smart Swithces with OpenBK7231T firmware.

3 Likes
298

The delay happens with Moes MS-104B. I assume you’ve tested with other hardware, not MS-104B. Am I correct? It seems to be something related to this model.

Congrats on writing the guide. OpenBK7231T seems to be a promising project.

299

For the Skydance S1-B(WT) 1CH*1.5A WiFi-RF+Push AC Phase-cut Dimmer S1-B(WT)

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I managed to get this working with both tasmota and esphome, DOIT ESP02 or TYWE2S TYWE2S Replacement Module (ESP-02S) Configuration for Tasmota modules work fine but WT32C3-01N Module (WT32C3-01N) Wireless Tag WT32C3-01N Module (WT32C3-01N) Configuration for Tasmota does not work, the serial communication like never happens.

the uart needs to be set as follows in esphome yaml: -

uart:
  rx_pin: RX
  tx_pin: TX
  baud_rate: 115200
  stop_bits: 1

in tasmota that would be

SetOption97 1

Datapoints are configured as follows: -

light:
  - platform: "tuya"
    name: "${friendly_name}"
    dimmer_datapoint: 22
    switch_datapoint: 20
    min_value: 25
    max_value: 1000

or

Backlog TuyaMCU 11,20; TuyaMCU 21,22; DimmerRange 25,1000

for tasmota,

The issues I have are, if operated from either the RF remote or AC Push button. the statuses will not update, they update fine using the tuya integration and original firmware.

Anybody have any idea how I could track the dimmer commands from RF or AC Push button I have an isolated TTL adaptor and an untouched original firmware dimmer module with the TX and RX traces soldered to wires for sniffing?

2 Likes
300

I just bought an AOFO 4AC+4USB Tuya Power Strip from Amazon

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Opening the power strip I found that a Tuya custom CB2S ESP is built in instead of the expected TYWE2S (ESP02S), which apparently comes without the GPIO needed for the boot options. Has someone found in the meantime a way to flash this chip with ESP Home using an UART/USB Adapter, or is it still required to replace it with an ESP02S?

Especially as I did not find a ESP02S on Aliexpress shipping to Germany…

301

Not esphome, you’ll need to replace with esp
But you can still flash with openbkt on the bk7231n (cb2s)

302

What is openbkt? Do you have any instructions? If it will get me local control i. Home Assistant, I am willing to give it a try.

303

Read about 10 posts above. There is even a tutorial.

304

Thanks for the hint.
Using the Beken Writer V1.60 I opend/browsed for the OpenBK7231N_QIO_1.12.1.bin file I downloaded.
On the power strip’s CB2S I soldered some pinned cables to

  • GND
  • 3.3V
  • RX and
  • TX

according to the datasheet of the CB2S and connected them to my USB to TTL connector with RX and TX crossed over. At this point a red LED on the power strips PCB started flashing.
Following I pressed “Programm” and connected CEN pin on the CB2S briefly to GND, but the tool did not establish a connection.

Am I missing anything?

305

@T1ppes for me, it takes several tries with CEN resetting to get bkWriter or hid_download_py to work. It’s tricky, you have to connect CEN to gnd for a certain amount of time, I don’t know, half a second.
I mostly just reboot device with power line instead of using CEN.

For OpenBeken information, see: https://www.elektroda.com/rtvforum/viewtopic.php?p=20119492#20119492
I reply there faster.

Some new information: OpenBeken is now multiplatform and supports also W800/W801 platform with OTA.
So, to sum up, it works on BK7231T, BK7231N, XR809, BL602, and W801/W800 (also on T34 which is just a Beken die in extra casing)

306

Has anyone already tried the “openbk7231T_App” with Moes MS-104?
After changing the UART converter I have managed to flash. But I have only managed to configure the relay by configuring it on pin24. The switch, I still haven’t managed to make it work…
Would anyone know anything else?

307

Don’t complicate yourself more… I bought another 340G UART adapter.
It is already installed and working! :smiley:
Now the only thing left for me to solve is that if it restarts it maintains the state. That takes a couple of nights appearing lights on!
another thing i have checked is that the relay is configured as inverted.
So when on screen is On. It really is off.
Any way to reverse this?