Teckin SP22 with Realtek chips RTL8710BN

[rikthefrog]

Currently Tuya is selling Teckin SP22 smart connectors with the Realtek chip RTL8710BN. On these chips is doesn't look Tasmota is working. According to Max Prokhorov these chips can only be flashed with an SDK which is provided to the vendor by Tuya :(

So be careful if you want to buy Teckin SP22 and want to flash it, you can run into a big disappointment.

[Jason2866]

This is really bad news :-(

[hochwasser]

On the template repository I put a warning about those plugs. Maybe a warning should be put one the wiki here too. I think about buying ESP-12F modules or the original ones from tuya TYWE2S. Has somebody done this?

[Jason2866]

@hochwasser You can make changes in wiki ;-)

[hochwasser]

I created a page: https://github.com/arendst/Sonoff-Tasmota/wiki/Teckin-SP22

[znanev]

@hochwasser Most of the UK plugs that I got come with module ESP8266-3 (manufactured by Hysiry for Tuya). I damanged one of the modules while desoldering it from the main board, but found replacement on AliExpress:

https://www.aliexpress.com/item/32869538851.html

Its form factor is closer to TYWE2S, so you could use that.

[MaSylvester]

Some Pictures from the new V15 with Realtek-Chip

[hochwasser]

@znanev The module you suggested has the pins opposite of each other. One the TYWE2S the pins on the back side have an offset. You can see this quite well on this picture:

@MaSylvester How did you open the case? I made some damage to the border and on one side I cut the over lapping of the border. So the case does not look nice any more.

Does somebody know what the IC U1 make and what type it is?

[Jason2866]

You mean U4? This is the power monitoring ic BL0937

[znanev]

@hochwasser I thought that you're not looking for a direct replacement, because you mentioned ESP-12F, which has quite different pinout than TYWE2S.

[hochwasser]

@Jason2866 No. That chip could i identify. I mean the chip U1 on the top right side in the picture from @MaSylvester.

@znanev Sorry, my failure. The ESP-12F is easier and faster to get here. This is the cause why I want to use it. I found https://german.alibaba.com/product-detail/tuya-tywe2s-wifi-module-develop-wireless-networking-module-esp-8285-wifi-module-development-62133775853.html but I don't know if the supplier is trustworthy.

[znanev]

@hochwasser I would give alibaba.com a go, I've used them in the past. At least the price is not prohibitive.

Did you manage to track the signals going in / out the RTL module, i.e. is it pin compatible to TYWE2S?

[hochwasser]

@znanev I looked at the datasheet tuya supplied: TYWE2S / WR2 (at the bottom you can change the language to english)

The pinout seems equal enough and the marking on the PCB on the module slot is TYWE2S. So I'm pretty sure the TYWE2S would fit.

[znanev]

@hochwasser Indeed, just compared the pins of both modules and they look compatible. So you could try replacing the RTL module for the ES8266-based TYWE2S. This will be a nice module transplantation exercise - I even envy you a bit for that opportunity :)

[MaSylvester]

@hochwasser : I used the blade from my IFixiIt-Kit and made some turn-around at the case. I'm also interested in some TYWE2S-Modules if you would buy some from alibaba.

[MaSylvester]

@hochwasser , @znanev Some more pictures from U1 ans the WLAN-module

[Jason2866]

From whats around the IC U1 it is a switching power supply unit

[andrethomas2]

Closing this issue as it relates to an unsupported device on which Sonoff-Tasmota will not run.

At this point only ESP8266/ESP8285 devices are supported in this repository.

[rdlvm]

Do you know if there is the same problem with teckin sp21? or sp21 only has chips yours flasheables via wifi? Thank you

[ToxicF]

@znanev I looked at the datasheet tuya supplied: TYWE2S / WR2 (at the bottom you can change the language to english)

The pinout seems equal enough and the marking on the PCB on the module slot is TYWE2S. So I'm pretty sure the TYWE2S would fit.

hey @hochwasser , did you had success with changing the chip? I would be really interested because i got some SP22's too, and unfortunately they also got the new chip.

[krakkato]

Hi, I have SP22 with a new chip ... I replaced the chip with esp12s and tasmota. Relay, blue and red LEDs work fine... but I can't read the consumption measurement.

[hochwasser]

@ToxicF sorry for not answering earlier. I did not work and like @krakkato I could not read the power consumption. The chip for the power consumptions seems really picky: I did not get any meaningful data or changes on the pins. I measured with an oscilloscope with not luck ether.

I cut my losses and bought DELOCK 11826, they already come with tasmota and are easy to update. A friend of mine told me that there is a new one with power meter, DELOCK 11827. But on the WLAN he get packet losses. Maybe someone can test this device if his setup is broken or the 11827 has some problems.

[jaymemaurice]

I have purchased a pair of Teckin sp20's that appear to have this same chip 👎 From the outside they are indistinguishable (including FCC ID) from the ESP based ones I had purchased earlier. The silk-screening on my ESP based version is slightly lighter and crisper... but maybe that's just my imagination.

[frank-ydf]

just to add some info: I opened my SP-22 EU plug version (shuko) bought on amazon a couple of months ago and I found a T112_V1.1 wifi module inside. It seems to be like the T102 (same realtek chip) as mentioned above BUT is bigger and with different pinout than the TYWE2S (that I have already at home) so, it is not possible to switch them just by desoldering/soldering in the same position

[array81]

Is there a wat to know if a SP22 use or not use a ESP chip without open it?

[sfromis]

Yes, find the MAC, and look it up on a site like macvendors.com. If it is Espressif, the chip is ESP.

The MAC just might be on a label somewhere (don't count on that), or find it in pairing mode using some Wifi analyzer app.

[zillion42]

Hi,

I don't know if I'm right here. Please point me to a general serial flashing hardware discussion if not.

I have some moderately old Teckin Sp22 which hopefully still can be tasmotized ?

The BlitzWolf SHP2, HomeCube SP1, and Teckin SP22 are basically the same device barring the branding.

I tried OTA tuya convert today but unfortunately the firmware is to new.

could not establish sslpsk socket: [SSL: NO_SHARED_CIPHER] no shared cipher (_ssl.c:1056) don't panic this is probably just your phone! new client on port 443 from 10.42.42.24:49153 ID: 02f90525f2566f56f7a7c37d5f02c07588de99375850ed78f6f429d7643fe62669ed9cac325e8017ca9e35faf4fc88e274

and

Attempting to diagnose the issue... Your device's firmware is too new. Tuya patched the PSK vulnerability that we use to establish a connection. You might still be able to flash this device over serial.

So I would like to flash them over serial... I managed to open one of the housings today (they have no screws, and I broke it, but its collateral) and found the following:

https://photos.app.goo.gl/ZBCecqas7YuGs3Xw5 https://photos.app.goo.gl/DkAsqHvbKk3iAASRA

Looking at the pictures, I found this thread.

P.S: Mac Address is: 18:69:D8:5E:EA:A8 =>Tuya Smart Inc.

Can those be flashed ? Thx in advance.

[barbudor]

Not an ESP Bad luck

[sfromis]

MAC lookup should say "Espressif", and this round logo means "Tasmota-compatible"

[flohav]

Hi, I just flashed ESPHome on a SP22 plug with RTL8710BN using LibreTuya. https://github.com/kuba2k2/libretuya I posted the config on their Discord.

[Jason2866]

@flohav Tasmota crew has not planned to support Realtek nor any other chips from other vendors than espressif