# Home Assistant Community Add-on: wmbusmeters (W-MBus to MQTT)
This add-on allows you to acquire utility meter readings **without** the vendors bridge or gateway as long as they support C1, T1 or S1 telegrams using the wireless mbus protocol (WMBUS).
## Installation
The installation of this add-on is pretty straightforward and not different in
comparison to installing any other community-driven Home Assistant add-on.
1. Navigate to Supervisor > Add-on Store > Repositories
1. In the logs you should see all the W-Mbus telegrams that wmbusmeter is able to receive. <br>_If you don't see anything, check the logs carefully. <br> If you configure it late evening or in the night, please note the radio modules often send telegrams less frequently than in typical working hours or don't send them at all. <br> If your antenna is in a distance to the radio module, try to locate it closer._
1. You are ready to configure!
1. Finally, don't forget about adding the MQTT sensor into your Home Assistant.
## Configuration
Once the wmbusmeters is receiving the telegrams you need to configure your meter using `meters` option (see below) to pass the readings to MQTT topic.
Specify your meters using YAML format. The `driver` and `id` values can be read from the add-on logs after the initial start (with empty `meters` configuration). The `name` is your label for the meter and `key` is the encryption key to decrypt telegrams (if your meter use any).
Path relative for add-on where wmbusmeters files are stored:
```
/logs/meter_readings/
/etc/wmbusmeters.conf
/etc/wmbusmeters.d/
```
#### Option: `mqtt`
By default it is empty `{}` and leverages then the _Moquitto broker_ addon details provided by supervisor. However, you can specify the custom mqtt broker connection details here
Finally, you need to tell Home Assistant how to extract the readings from the MQTT. You can add the following sensor definition into your `mqtt:` section of `configuration.yaml`.
-`MainWater` is the water meter name used in `meters` configuration._
-`device_class` is necessary to be adapt on your meters type (water, gas, etc.) [see here](https://developers.home-assistant.io/docs/core/entity/sensor/#available-device-classes)