New Itead based Wall Switch

[drbrains]

Hi guys,

I just got a new Itead based Wall Switch (SONOFF-Touch look-a-like) based on the PSB-B04-GL.

outside front.jpg (35.19 KiB) Viewed 35874 times

outside back.jpg (38.82 KiB) Viewed 35874 times

Inside touch panel.jpg (38.41 KiB) Viewed 35874 times

behind touch shield.jpg (49.38 KiB) Viewed 35874 times

relay board.jpg (54.72 KiB) Viewed 35874 times

closeup relayboard J2.jpg (58.96 KiB) Viewed 35874 times

back of touchpanel.jpg (56.04 KiB) Viewed 35874 times

Since it is based on the PSB-B04-GL I was hoping to re-flash with ESPEASY and use it with Domoticz. However I can't find the correct TX/RX and GPIO0 pins. On the Itead wiki page there is some documentation for the module: https://www.itead.cc/psb-04.html

The switch is availlable in 1, 2 and 3 gang versions and different colors. I noticed on AliExpress that the same PSB module is also used in a 4 CH USB power Relay board. I hope someone can help me figure out how to flash this board.

[Shardan]

Hello,

i suppose i have to disappoint you.

The PSB is based on ESP-8266. The little drawing on the page you mentioned shows that TxD and RxD are lead through another chip and not connected to the outside pins.
So it won't be possible to flash ESPEasy on the PSB-circuit. All key and relay connections run through this chip.

Itead does not give much info about the PSB circuit but i think it's the same as with the Sonoff Dual. They use a serial driven port chip to read keys and switch the relays.
As far as i know this is not supported by ESPEasy at this time.

So even if you manage to flash ESPEasy an the PSB it won't work.

Sadly i can't give a better news, sorry.

Regards
Shardan

[drbrains]

Thank you Shardan for the reply.

I was looking at that little picture myself and was wondering what they were doing with the "other chip'.

Too bad. Guess I have to start making space in my walls to fit multiple SonOFF Touch (single gang), or hope they will make their own version.

[Shardan]

You're welcome.

Sorry i couldn't give better news.

It is a bit critical with these items.
Sonoff basic works as at least the relay is connected directly to the ESP.
Sonoff Dual does not work as they use this additional chip, might be a STM8003 or similiar MCU.
Sonoff 4ch should work, i will test it as soon as my sample arrives.

Even the new ESP-014 uses a STM8003 internally and is not compatible with ESPEasy.

It might be a good idea to make a verified list in the forum wich items work and which do not.

Regards
Shardan

[drbrains]

I am glad I don't take "NO" as an answer

I managed to flash the devices with firmware called "ESPurna" from Tinkerman. (http://tinkerman.cat/tag/espurna/)

Its basically the SonOFF Dual as suggested (support chip is SIL F330). I realise its not ESPEASY so I will not continue this topic but I wanted to share this anyway.

PSB-B04-PinMap.jpg (95.48 KiB) Viewed 35795 times

PSB-B04 flashable.jpg (57.9 KiB) Viewed 35795 times

I removed the cover to get a better look on the inside, this is not required to flash.

[gajotnt]

Where did you buy this?

[drbrains]

I got it on Taobao.com. The switch is not branded, but it came in a box from tantech.

Http://tantech.taobao.com

I didn't find them in EU format (round) yet. This one is "Chinese", so square.
As to control it with ESPEasy: I am looking at the ser2net plugin to see if I can make a plugin to talk to the SIL F330 chip.

[gajotnt]

Thanks for the reply
ESP Easy working with this and the Sonoff Dual, would be amazing

[Shardan]

Seems the dual wall Switch is not on the Itead page, only the retired Version.

The actual one channel is availlable at
https://www.itead.cc/sonoff-touch.html

[ferbulous]

Hi, have you tried flashing the firmware on the 3 gang switch version?
Is is the same procedure? I'm planning to grab a few

[jomeg0]

Hi drbrains,

I have one question about the taobao switches. Despite being square, is the back of the switch small enough to fit in the European switch (round) box?

Thanks in advance,

Sincerely

Edward

[drbrains]

The back of this switch is square. I'm not sure if it would fit in the European round hole. I noticed other brands gave special eu cases and the seem slightly smaller.

As for a 1,2 or 3 gang. The process is the same and software can handle up to 4 switches as the little PCB has 4 In and 4 Out pins.

[VanShava]

Hi, drbrains,

It's so excited to find a way for flashing custom firmware on esp-b04.
I have similar switch in 3 gang and would give a try on it.

May i know which Hardware to "Un-Comment" inside arduino.h? SONOFF_DUAL? SONOFF_4CH?
Which board and Flash size to be selected? Generic ESP8266 module/ 1M(128K) SPIFFS?
Do need to modify any code inside espurna, let say for matching any GPIO for Button / Relay?

[Shardan]

Hello,

not all Sonoff's run seamlessly on ESPEasy.
Sonoff Basic / TH10 / TH16 / S20 are known to work with ESPEasy.
Most of them use the 1MB (1024) binary afaik.
The Sonoff 4ch works, but it uses a slightly different processor (ESP8285 instead of 8266),
so you have to compile your own binary with the settings for that chip.

Sonoff Dual and several other Sonoff products use ESP8266 with a signal processor on the serial output..
These are not supported atm. There are some workarounds but not really "technically perfect" .

Regards
Shardan

[ferbulous]

Hi, drbrains,

It's so excited to find a way for flashing custom firmware on esp-b04.
I have similar switch in 3 gang and would give a try on it.

May i know which Hardware to "Un-Comment" inside arduino.h? SONOFF_DUAL? SONOFF_4CH?
Which board and Flash size to be selected? Generic ESP8266 module/ 1M(128K) SPIFFS?
Do need to modify any code inside espurna, let say for matching any GPIO for Button / Relay?

The back of this switch is square. I'm not sure if it would fit in the European round hole. I noticed other brands gave special eu cases and the seem slightly smaller.

As for a 1,2 or 3 gang. The process is the same and software can handle up to 4 switches as the little PCB has 4 In and 4 Out pins.

I'd appreciate if you could go into detail for the arduino setup
Also, were you able to get it to work with mqtt & homeassistant?

I've also ordered another 4 gang itead based wall switch that should be arriving within the end of this week
It's not tantech, but it could be based on PSB-B04-GL as well, I will know more once I open it

Here's the link if anyone's interested

https://world.taobao.com/item/540194306 ... .14.ZBoI9j

[jomeg0]

Hi drbrains,

I'm new to all this. I have managed to flash a few standard Sonoff switches for Smartthings and they all working well. What I'm trying to do now is flashing a WiFi wall switch like you did. Does this Chinese switch despite being square fit in an EU box (round)?

Thanks in advance

Best regards

Edward

[drbrains]

I am not sure if it will fit in the round European wall sockets. These switches were designed for China. They have square holes. Most switches I saw for the EU market have a different form factor. They are round in the back, which means redesigned pcb most of the time.

It's all based on this:
https://www.itead.cc/wiki/PSB_Smart_Switch_Module

The espurna firmware (last I checked) only uses 2 pins, cause it was designed for the sonoff dual. The sketch is easy to read and modify to add the other pins / switches / relays.

[ferbulous]

I am not sure if it will fit in the round European wall sockets. These switches were designed for China. They have square holes. Most switches I saw for the EU market have a different form factor. They are round in the back, which means redesigned pcb most of the time.

It's all based on this:
https://www.itead.cc/wiki/PSB_Smart_Switch_Module

The espurna firmware (last I checked) only uses 2 pins, cause it was designed for the sonoff dual. The sketch is easy to read and modify to add the other pins / switches / relays.

Could you give more detailed instruction on how to configure that?
Did you have to add another extra pin since it's a 3 gang switch? What if I try to flash different firmware like tasmota to this 4 gang wall switch from herehttps://world.taobao.com/item/540194306 ... .14.ZBoI9j
Will it list all 4 main switch automatically on the settings or I still need to modify the sketch?

Btw, the 4 gang wall switch is using PSF-B85.

[bobbybeans]

how the heck did you buy them from there? it took me ages to sign up for it then they wanted a 2 step auth and it was all different language. I managed to order them and they charged me but they never came. I cancelled and got my money back
I have the original itead one and can confirm it can be flashed
only had one problem. it locked up after running for a few months . pulled it out put it back it and back up and runng

[ferbulous]

how the heck did you buy them from there? it took me ages to sign up for it then they wanted a 2 step auth and it was all different language. I managed to order them and they charged me but they never came. I cancelled and got my money back
I have the original itead one and can confirm it can be flashed
only had one problem. it locked up after running for a few months . pulled it out put it back it and back up and runng

So no updates at all on the tracking?
My current location is in Singapore & I usually get my orders from taobao within a week.

[bobbybeans]

nice, no i waited for 3 weeks and it said it didn't even shipped. They gave me the money back but I couldn't read much. it was hard enough to login with the forced 2fa. i mean dont get me wrong i love 2fa but if i have the option to enable it and i can read the website.../ texts they send (which I cant)

[enesbcs]

Itead does not give much info about the PSB circuit but i think it's the same as with the Sonoff Dual. They use a serial driven port chip to read keys and switch the relays.
As far as i know this is not supported by ESPEasy at this time.

It may be done with a plugin. Are there any information about used serial commands? Similar to Sonoff Dual?

[ferbulous]

hi drbrains,
I've flashed espurna on it,
I can turn on/off the touch from espurna webpage, but the switch status is not updated if I manually turned the the switches off/on.
Can you share how you configured it?

[papperone]

hi drbrains,
I've flashed espurna on it,
I can turn on/off the touch from espurna webpage, but the switch status is not updated if I manually turned the the switches off/on.
Can you share how you configured it?

Are you still talking about the discontinued "Touch" 2 channel switch?
I saw ITEAD has deployed a new line of switch, called "Sonoff T1" which are available in 1, 2 and 3 channel configuration.
Anyone got any? Would be great to understand the hardware and if ESPEasy pluing can be then written...

[ferbulous]

hi drbrains,
I've flashed espurna on it,
I can turn on/off the touch from espurna webpage, but the switch status is not updated if I manually turned the the switches off/on.
Can you share how you configured it?

Are you still talking about the discontinued "Touch" 2 channel switch?
I saw ITEAD has deployed a new line of switch, called "Sonoff T1" which are available in 1, 2 and 3 channel configuration.
Anyone got any? Would be great to understand the hardware and if ESPEasy pluing can be then written...

No, it's the same tantech switch that drbrains posted before
I actually a have few other wifi switch that are also ESP8285 based (using PSFB85 https://www.itead.cc/psf-b85.html)

https://goo.gl/photos/xzGnCyVKFUs284H89
https://goo.gl/photos/Q7zgtRbWN1BeszJw8

Those work right away after I flashed sonoff 4ch of the espurna firmware.
But it's not really working properly with this tantech

I think the newer Sonoff T1 might be using the PSFB85 chipset

[papperone]

PCB tracks for AC are ridiculous on those units you just posted pictures; I won't install them in my house!!
My philosophy si different and my system is designed to work differently, surely it requires more rewiring and is more exepnsive but I truly believe is safer.
I'll post some pictures / info as beside the hardware (which is custom made) I am working to have all nodes rurring ESPEasy!

[danielgajdos]

Sonoff Touch T1 is based on the same PSF-B04 chip so to get into flash mode you have to ground GPIO0 as usual. I successfully uploaded Tasmota firmware into 2 gang version of T1.

[gajotnt]

PCB tracks for AC are ridiculous on those units you just posted pictures; I won't install them in my house!!
My philosophy si different and my system is designed to work differently, surely it requires more rewiring and is more exepnsive but I truly believe is safer.
I'll post some pictures / info as beside the hardware (which is custom made) I am working to have all nodes rurring ESPEasy!

If you use +/-10watt led lights, you're talking about 0.05Amps

A 0.2mm tick cable can handle that amperage, looks safe to me.

Of course if one is using higher power lamps, then that's a different story

[Shardan]

Even those 0,05A circuits might produce a short circuit.