Viega Wannenfüllamatur Tro E3

[Roeller]

Hello,

I have recently build a project with a Fantastic Bathroom with 2x Viega Trio. It really looks like a dream! I will post a video.

The Viega Trio WIFI module will be discontinued (and there will not be a follow-up device, they will not stop the Trio product, but just the Wifi unit because it was made by Oblamatik AG and that's Viega Swiss now, however, they moved a lot and decided to stop development for this thing)

but no problem!

I 'broke in' on the Wifi module, copied all files.. and have sniffed the BUS traffic (which is 9600baud rx/tx). Then I ordered the same connectors as the Display and the Wifi Module uses, and I am working on a very small (esp like) device which you can put between the display and the main unit.

You can even put it between the display and the main unit when you already have a wifi module connected.

I have documented my project here: https://github.com/roelbroersma/viega_multiplex_trio_e (about breaking in on the unit.. making photos.. and downloading all the files)

[mom]

The Viega Trio WIFI module will be discontinued (and there will not be a follow-up device, they will not stop the Trio product, but just the Wifi unit because it was made by Oblamatik AG and that's Viega Swiss now, however, they moved a lot and decided to stop development for this thing)

They wanted to stop the whole line or at least upgrade the electronics for years now.
Guess it's still selling well enough for now - or they have enough stock

I 'broke in' on the Wifi module, copied all files.. and have sniffed the BUS traffic (which is 9600baud rx/tx). Then I ordered the same connectors as the Display and the Wifi Module uses, and I am working on a very small (esp like) device which you can put between the display and the main unit.

That sounds great!
So given someone hacks together the right hardware, we could leave out the WiFi and connect this to LAN or even KNX?
Do you see any chance of writing to the file system of the Carambola2, so I could re-brand my modules? Maybe try to add a LAN port?
Too bad all the update servers are gone already.

Did you by any chance also play with the debug port of the main device or figure out the communications of the controls?

[Burgerking]

Hello,

I have recently build a project with a Fantastic Bathroom with 2x Viega Trio. It really looks like a dream! I will post a video.

The Viega Trio WIFI module will be discontinued (and there will not be a follow-up device, they will not stop the Trio product, but just the Wifi unit because it was made by Oblamatik AG and that's Viega Swiss now, however, they moved a lot and decided to stop development for this thing)

but no problem!

I 'broke in' on the Wifi module, copied all files.. and have sniffed the BUS traffic (which is 9600baud rx/tx). Then I ordered the same connectors as the Display and the Wifi Module uses, and I am working on a very small (esp like) device which you can put between the display and the main unit.

You can even put it between the display and the main unit when you already have a wifi module connected.

I have documented my project here: https://github.com/roelbroersma/viega_multiplex_trio_e (about breaking in on the unit.. making photos.. and downloading all the files)

That means, you are building your own WIFI Module?

This would be perfect! Because there is no chance to buy that anymore from viega! THX

[Roeller]

Yes. We can do two things:

- Put in an ESP, enable/connect the uart, and write a simple web/rest api.

- Put in an Pi or something and run the web files as on the original device. However, the files are not that sophisticated, we should be able to just ‘clone’ it fast by throwing it in AI and ask for an esp like version…

[mom]

Option 3?
Buy the last Carambola2 boards in existence (as that's also EOL and probably the reason Viega stopped production) and just rebuild the whole thing?
It's a multi-layer PCB so that's no fun - but the only active component outside of the Carambola board is an RS232 interface (ST3232EC).
IMG_3424.jpg
IMG_3422.jpg

[ppsm]

My Trio E3 broke down after being in use for merely 4 years. The stepper driver of the warm/cold mixer does not detect anymore if the stepper motor is stalled when the valve is at its limits. This means the controller keeps on trying to start up.
As it seems impossible to get only a new controller board instead of purchasing a complete new unit I am resolving to making my own controller.

I figured out most of the signals but I am stuck with the display knob.
Thanks to Roeller I know it uses a RS232 interface. The LAN module uses the same interface. But I have no idea what commands you need to send to get the display working. Because the controller board does not get initialized anymore there is no traffic on that bus that I can sniff out.

mom requested some time ago if anybody had more info on the interfaces so here is what I have.

Flow meter (VISION)

afbeelding.png

It looks like you get about a 1000 pulses/liter
The pulse output needs to be pulled up (open collector output).
Vcc is 8V on the board but it also functions at 5V.

Temperature knob

afbeelding.png

The encoder outputs and the switch are shorted to GND when operated. So you need to pull them up too.
In order to get the leds lit up you have to drive the inputs down in respect to Vcc.
Vcc is about 8V on the board. Driving LED R about 5V lower makes it light up.

Temperature sensor

Plain PT1000 sensor.

I have tried to send commands to the display knob based on several OLED protocols but without any luck. I guess there is microcontroller involved which expects dedicated commands.

If anybody would be capable and willing to check out the commands on the RS232 bus I would be very grateful.
Otherwise I will be forced to provide my own display too.