# Meshtastic Sensor Broadcaster

Periodically reads selected Home Assistant sensors and broadcasts them as a
single short text message to a Meshtastic channel.

## Options

| Option | Description |
|--------|-------------|
| `connection` | `tcp` (node on the network) or `serial` (node on USB). |
| `host` | Node IP/hostname (TCP mode). |
| `serial_port` | Device path, e.g. `/dev/ttyUSB0` (serial mode). |
| `channel_index` | Meshtastic channel index. `0` = primary. |
| `interval` | Seconds between broadcasts. |
| `prefix` | Optional text/emoji prepended to each message. |
| `sensors` | List of `{label, entity_id, unit}` to include. |

Example message: `🏠 T:21.4°C H:48% P:1013hPa`

## Airtime

Keep messages short and the interval reasonable (>= a few minutes) to stay within
LoRa duty-cycle limits and avoid congesting the mesh. Unavailable sensors are
skipped automatically.

## Serial nodes

Set `connection: serial` and `serial_port` to your device. The add-on requests
`uart`/`usb` access; check the device path under Settings -> System -> Hardware.