# Buderus Logamatic HMC 20

Source: https://docs.evcc.io/en/heating/buderus-logamatic-hmc-20

For heatpumps with Luxtronik 2.1 controller. Uses Modbus TCP. Requires software v3.90.3 or later. Enable via SERVICE, Systemsteuerung, Konnektivität, Smart-Home-Interface.

Supported features: dim

## Parameters

| Name | Description | Default / example | |
| --- | --- | --- | --- |
| modbus | Modbus Type (tcpip) |  |  |
| heatoffset | Heating temperature boost | 0.0 K |  |
| wwoffset | Hot water temperature boost Temperature boost offset for hot water. Possibly increases wear on compressor. | 0.0 K | advanced |

## Configuration example for evcc.yaml

```yaml
chargers:
    - name: my_heating
      type: template
      template: luxtronik
      
      # Modbus TCP
      modbus: tcpip
      id: 1
      host:  # Hostname
      port: 502 # Port
      timeout: 10s # optional
      heatoffset: 0.0 # Heating temperature boost (K), optional
      wwoffset: 0.0 # Hot water temperature boost (K), Temperature boost offset for hot water. Possibly increases wear on compressor. (optional)
```