Bosch WAV28G43/04 Washing machine with homeconnect

[MichaelHeimann]

Model (E-Nr.)

wav28g43/04

Spare parts page

https://www.bosch-home.com/de/de/spare-parts-list/WAV28G43-04

Appliance type

Washing machine

Your contribution

I've got a WAV28G43-04 which has homeconnect but I wasn't very happy with the homeconnect functionality (e.g. in home assistant), so I replaced it with a BSH Board like my dryer

Here's some photos:
Device Front

Fron Panel Back

The left RAST connector goes to the main power module in the machine with 7 pins. In the picture from right to left the pins are "Ground, d-Bus, VCC, rest unknown".
The middle RAST connector was used for the BSH Board. I used the cable from the homeconnect module for the BSH board which worked perfectly after cutting off two little plastic bumps.
The VCC pin of the middle RAST connector is not directly connected to the homeconnect module RAST connector - it is switched on when the module is setup in the machine. This is why I used the middle connector.
On the photo you can still see the COM2/homeconnect module being connected to the third RAST connector. The module is again located in the front of the machine even in front of the display PCB - probably for best Wifi connectivity.

Close-Up of the RAST connectors with the homeconnect module clearly visible.

Display PCB front

homeconnect module still in place.

homeconnect module removed front

homeconnect module removed back

homeconnect connector Close-Up with gap

The homeconnect module is now available for anybody who needs it.

The machine works with the RC2 BSH Board although I connected it to the front panel. I was afraid it needed the 1.0 adapter with the pullup resistor.

I still need to work on the esphome config and will post it here when I consider it done.

Please confirm

• I understand that it is not allowed to upload copyrighted material, particularly images, exploded views, or firmware binaries that I do not own.
• I read and understood the safety warnings.
• I checked the exploded diagrams on the spare parts page to learn more about my home appliance.
• I searched the discussion forum and the contrib directory for similar problems or appliance types.

[MichaelHeimann]

I've added my config as a pull request now since it reliably works and has quite a lot of info.

In the dest: 0x21 command: 0x1000 section I'm still VERY unsafe about the meanings.

But the config reliably reports when washing is done and that counts for me - everything else is nice2have and reverse engineering I'm to old for that sh*t ;)

Oh, and I did some silencing in the config since I use thread and I don't want to spam unneccessary.