Support for Wi-Fi Dimmer?

[jsponz]

Is this Wi-Fi Dimmer supported?

https://www.aliexpress.com/item/Wifi-Smart-Dimmer-220V-240V-150W-Controller-Timer-Switch-light-Voice-Control-Works-With-Amazon-Alexa/32962631174.html?spm=a2g0s.9042311.0.0.27424c4dZ69TdG

I have used tuya-convert to flash Tasmota, and it works. I have it with Tasmota.

I can't find any Info about this device. I have tried Tuya Dimmer but no success (no switching, no dimming control from the Tasmota interface).

Thanks!

[thxthx0]

Hi, 👍

the dimmer is also listed @ amzon: 'TOOGOO Wifi Smart Dimmer Module 220V-240V 150W'

For flashing/reading ESP8266 maybe also set pin marked 'RE' (Reset?) to GND - to disable ST MCU while flashing (same as for tuya-touch-dimmer).

[Jason2866]

These are typical bytes sent - each line is for a button press/slider move in the app FF 55 00 05 DC 0A FF 55 71 05 DC 0A FF 55 FD 05 DC 0A FF 55 FC 05 DC 0A FF 55 FC 05 DC 0A FF 55 FE 05 DC 0A FF 55 FF 05 DC 0A FF 55 FF 05 DC 0A

The third byte is the dim level (00 = Off, FF = Full on, anywhere in between according to the dimmer slider)

With (s)serialsend you can test the commands like done for this device

[HA-TB303]

I have exactly the same dimmer and I was able successfully to flash tasmota 6.5 to it using tuya-convert. Unfortunately I did not know at the time this is a "special" dimmer module using a seperate dimming chip which does seem to be supported in tasmota, but requires different tx and rx gpio's.

Before I fount that out, I flashed esphome. played around with that, but found there is no support for this special tuya dimming chip in esphome and tried to go back to tasmota. Flashed the tasmota minimal and then soft-bricked it somehow.

I now have to reflash by wire, but I'm not 100% sure how to proceed. Anyone having any luck flashing tasmota by wire and willing to share the wiring?

[DeanoXX]

I have flashed 1 via Tuya-convert and subsequently via Serial using the pins from the Lingan data sheet above.

From the edges of the Chip... GPIO0 to GND to put it into flash mode UTXD = TX URXD = RX

Used the GND + VCC from the board itself as they're easier.

I desolder from the dimmer board first...

Cannot get my later 2 to flash at all. Via Serial or Tuya-Convert. very frustrating.

[HA-TB303]

Tried, but mine won't flash either :(

[thxthx0]

Did you try to set marked pin 'RE' (Reset?) to GND too, as mentioned above?

[DeanoXX]

I have tried that yes with no success.

[thxthx0]

Thanks for trying it out. So we'll have to find other connections between ESP8266 and STM8S003F3 MCU - maybe cut traces.

[Slofware]

So problems are not flashing the ESP, so you could use Arduino software. But the problem is how and what you send to the chip which controls the dimming?

[james-fry]

Just ordered one from CN. Happy to be involved in testing when it arrives in a couple of weeks.

[xbmcnut]

I too have a dimmer now if anyone wants to me try things. I also have the switch (QS-WIFI-S03) which I believe is supported.

[davidelang]

note, I don't have the time to work on this right now, but it sounds like what's needed is to hook up a second esp8266 up with it's rx pin on the tx and rx pins of the dimmer (one at a time obviously) and record what goes back and forth between the two chips, at startup, and as you manipulate the controls (stock firmware on the dimmer)

David Lang

[xbmcnut]

If someone can show me how that would be connected, I'd be up for giving that a go. I've got various Wemos and NodeMCU floating about.

[james-fry]

Is there a manual for these devices? (can anyone link pdf or scan it? I searched high and low but I cant find anything) I am interested whether it supports manual dimming control from the push switch. There are other "in wall behind switch" dimmers that support:

• click = toggle light
• press and hold = adjust brightness, release to set

[keesschollaart81]

@james-fry That depends on the implementation on the firmware I guess. The Tuya implementation does not do 'press and hold' at least. But with Tasmota this should be possible, I think?

[james-fry]

@james-fry That depends on the implementation on the firmware I guess. The Tuya implementation does not do 'press and hold' at least. But with Tasmota this should be possible, I think?

Thanks that was super quick! :)

Actually it looks like it does support from the manual.

[MortenVinding]

I am interested whether it supports manual dimming control from the push switch. There are other "in wall behind switch" dimmers that support:

• click = toggle light
• press and hold = adjust brightness, release to set

Thats how it works yes. Actually all dimmers I have seen works that way, so I would be very surprised/disappointed if it didn't.

Don't think it has any advanced features like double/triple click though...

[MortenVinding]

note, I don't have the time to work on this right now, but it sounds like what's needed is to hook up a second esp8266 up with it's rx pin on the tx and rx pins of the dimmer (one at a time obviously) and record what goes back and forth between the two chips

Thats already been done, read DeanoXX comment:

These are typical bytes sent - each line is for a button press/slider move in the app FF 55 00 05 DC 0A FF 55 71 05 DC 0A FF 55 FD 05 DC 0A FF 55 FC 05 DC 0A FF 55 FC 05 DC 0A FF 55 FE 05 DC 0A FF 55 FF 05 DC 0A FF 55 FF 05 DC 0A

Btw: when I was poking around with my scope I noticed that one the the lines (can't remember if it was RX or TX) was very weak. It was not even able to drive the input of a FTDI chip or my logic analyser. Maybe it would be a good idea to add a current amplifier before the RX input of your serial port. Like a simple emitter follower (the resister is probably not needed).

[thxthx0]

Would be great if this thread could be reopened again because of the public interest 😄 and maybe support of the pros here 👍

This is a trailing edge phase dimmer (NON triac) with conventional pushbutton/switch control, wall installation and usable for most lights.

lowest price I found today €13,23 @Alixpress

[james-fry]

This is a trailing edge phase dimmer (NON triac) with conventional pushbutton/switch control, wall installation and usable for most lights.

AKA the holy grail :) As far as I am aware only zigbee and zwave solutions exist, and at 3+ times the price.

[thxthx0]

Well now I'm not 100% sure, instruction manual says QS-WIFI-D01-TRIAC :(

I still haven't received my order, maybe somebody could be so kind to take a picture/ read marking of the black component in its TO-220 package.

edit: well, sure, it's definitely a Power MOS FET (and not TRIAC) :)

[MortenVinding]

Well now I'm not 100% sure, instruction manual says QS-WIFI-Do1-TRIAC :(

I still haven't received my order, maybe somebody could be so kind to take a picture/ read marking of the black component in its TO-220 package.

Well I have personally never thought about that. Has always assumed that any dimmer would use a Triac all though I have wondered how it would turn it off midway in a wave...

The front (and printing) of the triac/mosfet is not easy visible, but on I see what looks like two rectifier bridges, so by looking at this diagram: I assume it is intact a mosfet based dimmer.

I have tried it with LED bulbs, and it works so I guess it is a trailing edge dimmer.

Best picture I could get of the "TO220" component: (technically not a TO220 I think, but never mind 😀) (the bridge rectifiers is the ones in front of it)

[thxthx0]

That's great. Thank you @ MortenVinding

When I looked at the photos for the first time, I thought I could see bridge rectifiers with Power MOSFET in the background.

This actually seems to be MOSFET SVF12N60 or similar type

Datasheet: http://www.silan.com.cn/english/product/apply/SVF12N60(F)(S)(K)%20Datasheet_2.20190103084411636821.pdf

Now we have all we wanted, just a little missing Tasmota integration 😄

[thxthx0]

Got my WiFi Dimmer today and flashed it successfully with Tasmota, it's workin'...

I had to set pin RE (= STM8 MCU Pin4 NRST) to GND for backup and flash (and also GPIO0 to GND for flash mode) - didn't try Tuya-Convert.

As DeanoXX already found out, there seems to be only one simple command with dim level between 0 to 255 (00 = Off / FF = full on).

With Tasmota and SerialSend5 I can now adjust all brightness levels: off 0% -> SerialSend5 FF 55 00 05 DC 0A on 100% -> SerialSend5 FF 55 FF 05 DC 0A 0 - 100% -> SerialSend5 FF 55 xx 05 DC 0A

Push Button / Switch input 'S' is connected to GPIO13

I can control the dimmer module well with virtual relays and rules,

but the manual push switch isn't working reliably yet, it doesn't always respond (?), and of course no 'Long Push' for dimming.

[dr-apple]

@thxthx0 10000x thanks for your work !!!!

@all very big thanks !!!!

[jsponz]

@thxthx0 Thanks!!!

Excellent.

[james-fry]

Great job. Thxthx @thxthx0 ;) Next I guess is more exploration on why the local control is shonky. Is long press dimming even a possibility with tasmota?

[james-fry]

Got my WiFi Dimmer today

Haha actually I found mine arrived today, too! Time to play!

[jsponz]

@thxthx0 If possible could you explain further the process? I am not familiar with SerialSend5...

Thanks!

[thxthx0]

Hi, it's pretty simple:

• Serial Tx and Rx setup as shown in the Generic Module pic above and then
• in Tasmota Console: Baudrate 9600 SerialSend5 FF55FF05DC0A SerialSend5 FF550005DC0A SerialSend5 FF558005DC0A

... and so on.

BTW the 'switch issue' seems to be because ESP GPIO13 is also connected to MCU Pin10.

Is long press dimming even a possibility with tasmota?

I think in the depths of the Tasmota source it is possible ;), but hardly only with rules.

[jsponz]

@thxthx0 Thanks again!!!

[james-fry]

Since I only got the device today I am playing with the default f/w before I hack it. When I 1st turned it on I skipped configuration with the tuya app and went straight to testing switch functions... and now I cannot get back to pairing mode. I tried both (!) of the reset methods in the instructions but neither worked for me. (hold switch for 10+ secs, switch on/off 5 times) Any idea how to reset the device to pairing mode? (with original tuya f/w)

[jsponz]

It works great, but I have some questions (sorry but I am not an expert in Tasmota... yet):

• After rebooting the device, the baudrate is lost and I have to enter it again via console. How can I store this value?
• Switch is not working here. I have the same wiring as with the original f/w but with Tasmota, it makes nothing.

Thanks!

[HA-TB303]

Hi finally I managed to get the dimmer flashed by wire.

I have tasmota running now, set up as:

And wired as:

But when I send the commands via the console nothing happens...:(

09:59:23 MQT: tele/%topic%/INFO3 = {"RestartReason":"Power on"}
09:59:31 MQT: tele/%topic%/STATE = {"Time":"2019-06-20T09:59:31","Uptime":"0T00:00:14","Vcc":3.182,"SleepMode":"Dynamic","Sleep":50,"LoadAvg":20,"Wifi":{"AP":2,"SSId":"XXXXX","BSSId":"XXXXXXXXXXXXXX","Channel":11,"RSSI":54,"LinkCount":1,"Downtime":"0T00:00:04"}}
10:01:15 CMD: Baudrate 9600
10:01:15 MQT: stat/%topic%/RESULT = {"Baudrate":9600}
10:01:32 CMD: SerialSend5 FF55FF05DC0A
10:01:32 MQT: stat/%topic%/RESULT = {"SerialSend":"Done"}
10:01:40 CMD: SerialSend5 FF550005DC0A
10:01:40 MQT: stat/%topic%/RESULT = {"SerialSend":"Done"}
10:01:48 CMD: SerialSend5 FF558005DC0A
10:01:48 MQT: stat/%topic%/RESULT = {"SerialSend":"Done"}
10:02:01 MQT: tele/%topic%/UPTIME = {"Time":"2019-06-20T10:02:00","Uptime":"0T00:02:43"}

[dr-apple]

I once tested it and it's great! But the problem is that you can not dim LEDS with it :-( lightbulb goes .... what have you already tested?

[HA-TB303]

I have tested with a 12v LED powersupply and a 12v LED behind it, but I measured the voltage output, and there is none.

[jsponz]

I have tested with several LED bulbs and it works. I have tested with LED bulbs and transformer.

[dr-apple]

@jsponz please post a link for the led und trafo ;-)

[dr-apple]

Here a video for my LED and Trafo tests: https://youtu.be/8gcd-AqhbHE

[jsponz]

Sure. I will do it tomorrow ;-)

[dr-apple]

@jsponz thanks ;-)

[jsponz]

I have watched your video. From my experience, the trafo is critical. In some cases, on the trafo, they use to write "flicker free".

I will send you pictures.

[james-fry]

With stock tuya f/w its working fine for my 0-100% with a philips dimmable LED bulb

[dr-apple]

Yes, also think that it lies on the transformer, the LEDs are dimmable ...

[dr-apple]

@james-fry is the p. led on a trafo or directly on 230V ?

[thxthx0]

Hi, you can and must use halogen or normal incandescent light bulbs, dimmable LED light bulbs, dimmable LED transformers, dimmable power supplies... e.g. https://www.amazon.de/s?k=led+trafo+dimmbar

@jsponz: baudrate isn't lost in my setup (?) but you can define a rule to set baudrate every startup

Rule1 1
Rule1 on System#Boot do Baudrate 9600 endon 

for switch you need a virtual relay (e.g. Relay1 @ GPIO14) and rule, but don't expect to much, it might work five times out of ten atm.

Rule2 1
Rule2 on Power1#State=0 do SerialSend5 FF 55 00 05 DC 0A endon on Power1#State=1 do SerialSend5 FF 55 FF 05 DC 0A endon

@HA-TB303: I can't see any error, maybe a bad connection...

[james-fry]

@james-fry is the p. led on a trafo or directly on 230V ?

Dimmable bulb directly in 240v

[dr-apple]

@thxthx0 thank you for this info: https://www.amazon.de/s?k=led+trafo+dimmbar

[DeanoXX]

Got my WiFi Dimmer today and flashed it successfully with Tasmota, it's workin'...

I had to set pin RE (= STM8 MCU Pin4 NRST) to GND for backup and flash (and also GPIO0 to GND for flash mode) - didn't try Tuya-Convert.

Can I ask what setup you used to flash ?

TTL/Serial USB ? 3.3v or 5v ? Which tool ?

Will have another go at mine !

[jsponz]

@jsponz please post a link for the led und trafo ;-)

As promised the pictures:

1) This is with a "flicker free" trafo:

2) This is a 220V dimmable LED from Sylvania:

3) This is a good quality dimmable LED driver:

I hope that helps.