Home Deluxe Whirlpool Splash -> Smart Control

Hardware
1

Hi together,
this is my first post in the community forum.
I hope the post is correcty signed.

As the titel sais, I got a low budget whirlpool from Home Deluxe; Model Splash. It only has a power supply to 230V and nothing else. All the functions are controlled by the internaly fitted board.

As soon as the pool has been pluged in, it shows the default temperature of 20 degrees celsius and heating inactive (i guess because of protection if no water is filled in).

I would like to transfere it to be smart controlled by Home Assistant.
I do have a solar system fitted on my house.

The idea is to switch on the power socket by a ShellyPlus1 if there is some produced power left.

Problem: As soon as the whirlpool get powered up, the heating is off and the target temperature is at 20 degrees.

The challenge is, to edit 2 default flags on the internaly fitted board software:

  • „heating on“ when powered up instead of „heating off“
  • target temperature to 38 degrees insted of 20

I‘ll post a detailed picture the next days of the Board.
I do have different on board programer. If there is a supported chip on it, I‘ll also post a dump file of it.

Is there anybody who can support me to get this job done?

Regards Bavarian

2

Hello together,
I managed to get out the board today.

control panel front
control panel front1920×1440 235 KB

control panel back
control panel back1920×1440 285 KB

control board front
control board front1920×1440 243 KB

Under the gel, I found the microcontroller STC 8H1K08 361-TSSOP20

STC 8H1K08 361-TSSOP20
STC 8H1K08 361-TSSOP201920×2560 358 KB

I did a couple of measures and found the connections between the MC and the seriel interface (picture 3 bottom right corner):

seriel interface
seriel interface947×770 76.6 KB

the following pins are connected to the seriel interface:
8 VCC / 9 VRef+
10 Gnd
11 RxD
12 TxD

Can anybody explain how to get a read out of this microcontroler?

Regards Bavarian

3

I have the same pool and am also interested in making it work, as I want to connect it to my PV system. I found the following pages where the Lay-Z-Spa was converted with an ESP32. Apparently, this pool has the same connection, so maybe the software would work here too :wink: Our pool has 6 wires, and the Lay-Z-SPA also has 6 wires :wink: