Feature Request

Description

It would be useful to allow users to configure custom manufacturer and model values for meters in the Home Assistant autodiscovery payload. Currently, these values are hardcoded to "RTLAMR2MQTT" and "Smart Meter" respectively.

Use Case

Users may want to specify the actual manufacturer and model of their smart meters for better identification and organization in Home Assistant, especially when managing multiple meters from different manufacturers.

Proposed Solution

Add optional manufacturer and model configuration fields to the meters schema in config.yaml, defaulting to the current hardcoded values if not specified.

Example Configuration

meters:
  - id: 22222222
    protocol: r900
    name: my_energy_meter
    manufacturer: "Sensus"
    model: "iCon A"
    device_class: energy