How do I use the HP for multi-zones (Tado alternative)

[buuhsmead]

Hi,
I am complete new to this area of Heat Pump (HP) control. So glad that P1P2MQTT exists and is usable for me to monitor and control the HP.
The nice thing is that I can use commands to control the HP and don't have to create ESP code, because others and specific Arnold did that already.

What I would like to have is a multi-zone heated home, which each zone (rooms like living-room, bed-room, bath-room) can be set to a different temperature. I could do that with Tado, but Tado does not work with P1P2 controlled Daikin HP's.

And I wonder if and how you did this, if at all.
I could off course by the Daikin LAN Adapter and the radiator controls with thermostats. But ..... Daikin does it with their LAN Adapter, which for me, the P1P2MQTT is a nice alternative.

I have a hybrid system without cooling and only radiators. The HP is the inside unit 'EHYHBH08AAV32' with 'NHYKOMB33AA' and the out-side unit 'EVLQ08CAV3' and MMI (EKRUCBL).

I am not using Home Assistant (HA) at the moment, just sometimes to check/verify. The most I use is 'telnet' and 'MQTT Explorer'. I like the for me, raw input / verify tools. And no, I am not able (yet) to understand the ESP level of steering.

Via telnet, I was able to put P1P2 into 'L1 mode' as needed to be an auxiliary controller.

Looked through the documentation and found several packet-types, let's see what happens and maybe, maybe I come to the right combi, somebody tells me, or I have to leave this idea. I have still several months before winter (July 2024).

Mode	Telnet	outcome
RT	E35002D01 35003101	did not work, maybe temp room and outside too high, above 22 C
RT	E35002D01 35003100	boiler active on display, could not use the MMI
RT	E35003100	MMI interface off
RT	E35003101	MMI interface on
	E3900BB09000200	switched from RT into LWT mode
LWT	E35002F01	Heating ON gives Circulation pump ON and Compressor pump ON
LWT	E35002F00	Heating OFF gives Circulation pump OFF and Compressor pump OFF
LWT	E35002F01 35003101	Did not notice a difference with 'E35002F01'