Dimplex si8tu

[grericht]

I have a dimplex si8tu
this has the pco5+ module installed. It also has a LAN card installed and an RTMEcon is connected to J23 FBus2.
I have integrated the heat pump into Home Assistant using various http requests. The control system in particular is very complicated.
Now I have come across this option. Can I also use it for my heat pump? I need a ModBus module on an ESP32 with ESPHome? I don't have a clue how to start it.
I would like to leave out the RTMEcon. But I need it because the passive cooling seems to need a temperature and humidity sensor.

[MadOne]

Hi,

i have no clue about the devices you are talking about. I know some weishaupt heatpumps are rebranded dimplex.
Can you enable modbus in the settings. We are using modbusTCP (over ethernet), so if you are lucky you already have everything you need.

[grericht]

this means ther is modbusTCP?

here is my pco5+

[MadOne]

To me this looks like modbus tcp is enabled on port 502 (default)

[grericht]

then i have to ask a stupid question: how can i conect to the heatpump over modbustcp?
the pco5+ is linked to my private network. i can reach over the configured ip adress.

looks like this. but is hard for me to get the values in my home assistant and harder to control them.

[grericht]

try but ther are no entities

[grericht]

this is my heatpump wiki:
https://dimplex.atlassian.net/wiki/spaces/DW/pages/3303571457/Modbus+TCP+Anbindung
but i dont know what is the correct yaml code:
modbus:

• name: "dimplex"
  type: tcp
  host: 192.168.188.94
  port: 502
  sensors:
  • name: "Dimplex Mode"
    slave: 1
    address: 5007
    scan_interval: 5
    input_type: input
  • name: "Dimplex Smart Grid"
    slave: 1
    address: 5167
    scan_interval: 5
    input_type: input
  • name: "Dimplex Parallel Displacement"
    slave: 1
    address: 5002
    scan_interval: 5
    input_type: input

[grericht]

i works. yeah. thankx

modbus:

• name: "dimplex"
  type: tcp
  host: 192.168.188.94
  port: 502
  sensors:

  • name: "Wärmemenge Heizen 1-4"
    slave: 1
    address: 5096
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

  • name: "Wärmemenge Heizen 5-8"
    slave: 1
    address: 5097
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

  • name: "Wärmemenge Heizen 9-12"
    slave: 1
    address: 5098
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

  • name: "Wärmemenge Warmwasser 1-4"
    slave: 1
    address: 5099
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

  • name: "Wärmemenge Warmwasser 5-8"
    slave: 1
    address: 5100
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

  • name: "Wärmemenge Warmwasser 9-12"
    slave: 1
    address: 5101
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

  • name: "Wärmemenge Schwimmbad 1-4"
    slave: 1
    address: 5102
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

  • name: "Wärmemenge Schwimmbad 5-8"
    slave: 1
    address: 5103
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

  • name: "Wärmemenge Schwimmbad 9-12"
    slave: 1
    address: 5104
    input_type: holding
    unit_of_measurement: "kWh"
    scan_interval: 10

[grericht]

reading is fine. but actually i couldnt write a value.

i try this may:

automation:
  - alias: "Aktualisiere Wärmepumpe"
    trigger:
      - platform: state
        entity_id: input_button.trigger_heatpump_update
    action:
      - service: modbus.write_register
        data:
          hub: dimplex
          unit_id: 1
          address: 5066  # Beispieladresse für Start Stunde 1
          value:
            - "{{ states('input_number.start_stunde_1') | int }}"
      - service: modbus.write_register
        data:
          hub: dimplex
          unit_id: 1
          address: 5067  # Beispieladresse für Start Minute 1
          value:
            - "{{ states('input_number.start_minute_1') | int }}"

[adobe-hills]

Hi @grericht,
looks like you have also a Dimplex pco5 steering heat pump. I have a similar machine and want to start bringing it to home assistant. Do you now have more register in your yaml file. Maybe you are so kind to share this modbus yaml? I never used modbus before, perhaps it will be easier for me to start with, if I have a starting yaml file.
Thx so much